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Question 1
Incorrect
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A 42-year-old man is brought in by ambulance after falling off a 6-foot ladder and hitting his head. He has a deep laceration to the lateral left knee and is being kept overnight for observations. An x-ray of the left leg shows no fractures. He has a history of hypercholesterolemia.
During the night, he is using the maximum dose of prescribed PRN morphine due to pain in his left leg. The doctor is called to review the patient and on examination, there is reduced sensation on the medial aspect of the plantar left foot.
What is the most likely diagnosis?Your Answer: Saphenous nerve injury
Correct Answer: Compartment syndrome
Explanation:Compartment syndrome is the likely diagnosis in this case, as excessive use of breakthrough analgesia and a history of trauma followed by lower limb pain should raise suspicion. Compartment syndrome occurs when pressure builds up in a compartment due to oedema and blood, resulting in venous compression and compromised transferring nerves. In this case, the patient’s medial plantar nerve has been compromised, leading to reduced sensation in the medial aspect of the plantar foot and paresthesia. The fact that the patient is using the maximum dose of PRN morphine should raise clinical suspicion of compartment syndrome, as it can be extremely painful. Pallor is a late sign, and x-rays may not show any findings in the context of compartment syndrome.
Acute limb ischaemia is an unlikely diagnosis, as the usual presenting complaint is pain with associated pallor from reduced arterial perfusion, which is not present in this case. Common peroneal nerve injury is also unlikely, as this nerve supplies the dorsum and lateral aspects of the foot, whereas the medial plantar nerve has been compromised in this case. Posttraumatic osteomyelitis is also an unlikely diagnosis, as it typically presents more than 48 hours after the trauma, and the loss of sensation in the medial aspect of the plantar foot cannot be explained by this condition.
Compartment syndrome is a complication that can occur after fractures or vascular injuries. It is characterized by increased pressure within a closed anatomical space, which can lead to tissue death. Supracondylar fractures and tibial shaft injuries are the most common fractures associated with compartment syndrome. Symptoms include pain, numbness, paleness, and possible paralysis of the affected muscle group. Diagnosis is made by measuring intracompartmental pressure, with pressures over 20 mmHg being abnormal and over 40mmHg being diagnostic. X-rays typically do not show any pathology. Treatment involves prompt and extensive fasciotomies, with careful attention to decompressing deep muscles in the lower limb. Patients may develop myoglobinuria and require aggressive IV fluids. In severe cases, debridement and amputation may be necessary, as muscle death can occur within 4-6 hours.
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This question is part of the following fields:
- Musculoskeletal
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Question 2
Correct
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A 35-year-old Japanese man presents with recurrent oral and genital ulcers, as well as painful nodules on his shin. He has a history of recurrent episodes of red eyes and thrombophlebitis in his legs.
What is the most probable diagnosis?Your Answer: Behçet syndrome
Explanation:Differentiating Behçet Syndrome from Other Rheumatic Diseases
Behçet syndrome is a rare inflammatory disorder that is most commonly seen in Turkey, Iran, and Japan. It is characterized by recurrent oral ulceration and can also involve the eyes, skin, joints, and other organs. Diagnosis is based on international criteria that require oral ulceration plus any two of genital ulcers, defined eye lesions, defined skin lesions, or a positive skin pathergy test. Treatment involves corticosteroids, immunosuppressants, and other medications.
It is important to differentiate Behçet syndrome from other rheumatic diseases that can present with similar symptoms. Familial Mediterranean fever is another rare genetic disorder that can cause recurrent fever, arthritis, and serositis, but it typically affects different ethnic groups and has a different pattern of symptoms. Polyarteritis nodosa is a type of vasculitis that can cause systemic inflammation and damage to blood vessels, but it typically presents with different symptoms than Behçet syndrome. Reactive arthritis is a type of arthritis that can occur after a bacterial infection, but it typically involves urethritis and conjunctivitis in addition to joint pain. Palindromic rheumatism is a rare type of arthritis that involves sudden attacks of joint pain, but it typically does not cause lasting joint damage.
By carefully considering the patient’s symptoms and medical history, healthcare providers can make an accurate diagnosis and provide appropriate treatment for patients with Behçet syndrome and other rheumatic diseases.
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This question is part of the following fields:
- Musculoskeletal
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Question 3
Correct
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During a routine medication review, you observe your patient, a 50 year-old male, displaying some skin changes. The knuckles of both hands have purplish plaques, and the patient's eyelids also appear purple. There is no history of skin problems in the patient's medical records. What is the probable diagnosis?
Your Answer: Dermatomyositis
Explanation:Dermatomyositis is a connective tissue disease that presents with skin changes such as plaques on the knuckles and eyelids, scaling of the scalp, and changes to the nail beds and cuticles. It is often accompanied by inflammation of the proximal muscles causing weakness. It can be an autoimmune condition or a paraneoplastic syndrome and is treated with immunosuppressants.
Dermatomyositis is a condition that causes inflammation and muscle weakness, as well as distinct skin lesions. It can occur on its own or be associated with other connective tissue disorders or underlying cancers, particularly ovarian, breast, and lung cancer. Screening for cancer is often done after a diagnosis of dermatomyositis. Polymyositis is a variant of the disease that does not have prominent skin manifestations.
The skin features of dermatomyositis include a photosensitive macular rash on the back and shoulders, a heliotrope rash around the eyes, roughened red papules on the fingers’ extensor surfaces (known as Gottron’s papules), extremely dry and scaly hands with linear cracks on the fingers’ palmar and lateral aspects (known as mechanic’s hands), and nail fold capillary dilatation. Other symptoms may include proximal muscle weakness with tenderness, Raynaud’s phenomenon, respiratory muscle weakness, interstitial lung disease (such as fibrosing alveolitis or organizing pneumonia), dysphagia, and dysphonia.
Investigations for dermatomyositis typically involve testing for ANA antibodies, which are positive in around 80% of patients. Approximately 30% of patients have antibodies to aminoacyl-tRNA synthetases, including antibodies against histidine-tRNA ligase (also called Jo-1), antibodies to signal recognition particle (SRP), and anti-Mi-2 antibodies.
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This question is part of the following fields:
- Musculoskeletal
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Question 4
Correct
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A 45-year-old man complains of pain and redness around his first metatarsophalangeal joint. Which medication is most likely responsible for this symptom?
Your Answer: Furosemide
Explanation:Causes of Gout: Medications and Other Factors
Gout is a type of joint inflammation that occurs due to the accumulation of monosodium urate monohydrate crystals in the synovium. This condition is caused by chronic hyperuricemia, which is characterized by high levels of uric acid in the blood (above 0.45 mmol/l).
Several medications and other factors can contribute to the development of gout. Diuretics such as thiazides and furosemide, as well as immunosuppressant drugs like ciclosporin, can increase the risk of gout. Alcohol consumption, cytotoxic agents, and pyrazinamide are also known to be associated with gout.
In addition, low-dose aspirin has been found to increase the risk of gout attacks, according to a systematic review. However, this risk needs to be weighed against the cardiovascular benefits of aspirin. Patients who are prescribed allopurinol, a medication used to treat gout, are not at an increased risk of gout attacks when taking low-dose aspirin.
Overall, it is important to be aware of the potential causes of gout, including medications and lifestyle factors, in order to prevent and manage this condition effectively.
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This question is part of the following fields:
- Musculoskeletal
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Question 5
Incorrect
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A typically healthy 44-year-old man is hospitalized with T11/12 discitis that is complicated by a T4 to L1 epidural abscess and a left psoas abscess. Following surgery to drain the abscesses, laboratory cultures reveal the presence of Staphylococcus aureus. Furthermore, blood cultures taken upon admission grow Staphylococcus aureus after 72 hours. What is the most suitable initial investigation to identify the source of the infection, given the pathogenic organism detected?
Your Answer: HIV serology
Correct Answer: Echocardiogram
Explanation:In cases of discitis caused by Staphylococcus, an echocardiogram is necessary to check for endocarditis. Staphylococcus aureus is a highly aggressive pathogen that can spread throughout the body when it enters the bloodstream. In cases of deep abscesses caused by Staphylococcus aureus, a haematogenous source of spread should be investigated, with septic emboli from endocarditis being the most common cause. An echocardiogram is necessary to check for valvular injury or vegetations in all cases of Staphylococcus aureus-positive cultures. CT imaging is useful in identifying other abscesses and foci of infection, but is unlikely to identify a primary source of haematogenous spread. HIV testing is recommended for patients with Staphylococcus aureus sepsis, but it would not identify the primary source of bacteraemia. Midstream urine is not a reliable test for identifying a primary source of Staphylococcus aureus infection. The Duke’s Criteria for Endocarditis can be used to diagnose bacterial endocarditis, with a positive blood culture for a typical organism being one major criterion. Treatment for complicated discitis typically lasts for 6-12 weeks, with the first two weeks requiring intravenous treatment. If endocarditis is diagnosed, the length of intravenous therapy and overall treatment time may be altered.
Understanding Discitis: Causes, Symptoms, Diagnosis, and Treatment
Discitis is a condition characterized by an infection in the intervertebral disc space, which can lead to serious complications such as sepsis or an epidural abscess. The most common cause of discitis is bacterial, with Staphylococcus aureus being the most frequent culprit. However, it can also be caused by viral or aseptic factors. The symptoms of discitis include back pain, pyrexia, rigors, and sepsis. In some cases, neurological features such as changing lower limb neurology may occur if an epidural abscess develops.
To diagnose discitis, imaging tests such as MRI are used due to their high sensitivity. A CT-guided biopsy may also be required to guide antimicrobial treatment. The standard therapy for discitis involves six to eight weeks of intravenous antibiotic therapy. The choice of antibiotic depends on various factors, with the most important being the identification of the organism through a positive culture, such as a blood culture or CT-guided biopsy.
Complications of discitis include sepsis and epidural abscess. Therefore, it is essential to assess the patient for endocarditis, which can be done through transthoracic echo or transesophageal echo. Discitis is usually due to haematogenous seeding of the vertebrae, which implies that the patient has had a bacteraemia, and seeding could have occurred elsewhere. Understanding the causes, symptoms, diagnosis, and treatment of discitis is crucial in managing this condition and preventing its complications.
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This question is part of the following fields:
- Musculoskeletal
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Question 6
Correct
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Which X-ray alteration is not linked to osteoarthritis?
Your Answer: Periarticular erosions
Explanation:X-Ray Changes in Osteoarthritis
Osteoarthritis is a degenerative joint disease that affects millions of people worldwide. One of the most common diagnostic tools used to identify osteoarthritis is an X-ray. X-ray changes in osteoarthritis are characterized by the acronym LOSS, which stands for loss of joint space, osteophytes forming at joint margins, subchondral sclerosis, and subchondral cysts.
Loss of joint space refers to the narrowing of the space between the bones in a joint. This occurs as the cartilage that cushions the joint wears away, causing the bones to rub against each other. Osteophytes are bony growths that form at the edges of the joint. These growths can cause pain and limit joint movement. Subchondral sclerosis is a hardening of the bone beneath the cartilage. This occurs as the bone tries to compensate for the loss of cartilage. Subchondral cysts are fluid-filled sacs that form in the bone beneath the cartilage. These cysts can cause pain and further damage to the joint.
In summary, X-ray changes in osteoarthritis are characterized by LOSS: loss of joint space, osteophytes forming at joint margins, subchondral sclerosis, and subchondral cysts. These changes can help doctors diagnose and monitor the progression of osteoarthritis.
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This question is part of the following fields:
- Musculoskeletal
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Question 7
Correct
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A 35-year-old woman presents to her General Practitioner complaining of pain in the outer aspect of the left elbow. This pain has been going on for a few months and she occasionally feels the pain in the outer aspect of the left forearm as well.
She is otherwise healthy and physically active. She mentions that she enjoys rock climbing and often participates in climbing competitions.
Which one of the following findings on examination would necessitate a referral to an orthopaedic surgeon for further evaluation?
Select the SINGLE best answer from the list below.
Your Answer: Loss of sensation over the dorsum of the right hand
Explanation:Understanding Lateral Epicondylitis: Symptoms and Diagnosis
Lateral epicondylitis, commonly known as tennis elbow, is a condition that affects the tendons of the forearm extensor muscles. It is often caused by repetitive activities such as typing, playing tennis, or manual work. While it is a self-limiting condition, it can cause significant pain and functional impairment.
Symptoms of lateral epicondylitis include tenderness on palpation of the bony prominence of the lateral epicondyle, reduced grip strength, and pain on resisted middle finger extension and wrist extension. Diagnosis is usually clinical, and management can be initiated at primary care.
If a patient presents with loss of sensation over the dorsum of the hand, it may be an indication to refer them to an orthopaedic surgeon to rule out differential diagnoses. However, normal sensation is a common finding in lateral epicondylitis.
Overall, understanding the symptoms and diagnosis of lateral epicondylitis is important for proper management and treatment of this condition.
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This question is part of the following fields:
- Musculoskeletal
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Question 8
Correct
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A 28-year-old presents to his General Practitioner with a 2-month history of pain in his right elbow. His GP suspects that the patient has lateral epicondylitis.
What examination findings would confirm the diagnosis?Your Answer: Pain worse on resisted wrist extension with the elbow extended
Explanation:Common Elbow Pain Symptoms and Their Features
Elbow pain can be caused by various conditions, each with its own set of symptoms. Here are some common elbow pain symptoms and their features:
1. Lateral Epicondylitis (Tennis Elbow)
– Pain and tenderness localized to the lateral epicondyle
– Pain worsens on resisted wrist extension with the elbow extended or supination of the forearm with the elbow extended
– Episodes typically last between six months and two years; patients tend to have acute pain for 6-12 weeks
– Pain aggravated by wrist flexion and pronation2. Medial Epicondylitis (Golfer’s Elbow)
– Pain and tenderness localized to the medial epicondyle
– Pain aggravated by wrist flexion and pronation
– Symptoms may be accompanied by numbness/tingling in the fourth and fifth fingers due to ulnar-nerve involvement3. Cubital Tunnel Syndrome
– Initially intermittent tingling in the fourth and fifth fingers
– Pain worsens when the elbow is resting on a firm surface or flexed for extended periods
– Later numbness in the fourth and fifth fingers with associated weakness4. Carpal Tunnel Syndrome
– Pain worsens when the wrists are in complete flexion for at least 30 seconds
– The Phalen test is done to investigate its presence5. Olecranon Bursitis
– Swelling over the posterior aspect of the elbow with associated pain, warmth, and erythema
– Typically affects middle-aged male patientsUnderstanding Common Symptoms of Elbow Pain
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This question is part of the following fields:
- Musculoskeletal
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Question 9
Incorrect
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A 56-year-old man has been diagnosed with gout and you are discussing ways to prevent future attacks. What is the most probable trigger for a gout attack?
Your Answer: Chocolate
Correct Answer: Sardines
Explanation:To prevent gout, it is recommended to steer clear of foods that are rich in purines such as liver, kidneys, seafood, oily fish like mackerel and sardines, and yeast-based products.
Gout is caused by chronic hyperuricaemia and is managed acutely with NSAIDs or colchicine. Urate-lowering therapy (ULT) is recommended for patients with >= 2 attacks in 12 months, tophi, renal disease, uric acid renal stones, or prophylaxis if on cytotoxics or diuretics. Allopurinol is first-line ULT, with an initial dose of 100 mg od and titrated to aim for a serum uric acid of < 300 µmol/l. Lifestyle modifications include reducing alcohol intake, losing weight if obese, and avoiding high-purine foods. Consideration should be given to stopping precipitating drugs and losartan may be suitable for patients with coexistent hypertension.
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This question is part of the following fields:
- Musculoskeletal
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Question 10
Incorrect
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A 25-year-old female presents to her GP complaining of pain in her right knee. She is an avid runner and reports that the pain is most noticeable after exercise. She denies any swelling or redness in the joint and has not experienced any locking of the knee. Upon examination, the knee has a full range of motion, but there is sharp pain when palpating the lateral epicondyle of the femur, especially when the knee is flexed at 30 degrees. What is the most probable diagnosis?
Your Answer: Osteochondritis dissecans
Correct Answer: Iliotibial band syndrome
Explanation:Iliotibial band syndrome is a prevalent reason for knee pain, especially among runners. A typical history and examination for this condition involves assessing lateral knee pain in avid runners. In contrast, Osgood-Schlatter disease, also known as tibial apophysitis, would result in pain and swelling around the tibial tubercle. Osteochondritis dissecans would cause joint locking, swelling, and tenderness. Patellar tendonitis would also cause post-exercise pain, but it would typically be located at the lower part of the patella.
Understanding Iliotibial Band Syndrome
Iliotibial band syndrome is a prevalent condition that causes lateral knee pain in runners. It affects approximately 10% of people who engage in regular running. The condition is characterized by tenderness 2-3 cm above the lateral joint line.
To manage iliotibial band syndrome, activity modification and iliotibial band stretches are recommended. These measures can help alleviate the pain and discomfort associated with the condition. However, if the symptoms persist, it is advisable to seek physiotherapy referral for further assessment and treatment.
In summary, iliotibial band syndrome is a common condition that affects runners. It is important to recognize the symptoms and seek appropriate management to prevent further complications. With the right treatment, individuals can continue to engage in running and other physical activities without experiencing pain and discomfort.
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This question is part of the following fields:
- Musculoskeletal
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Question 11
Correct
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A 56-year-old man presents to his GP complaining of numbness and tingling in his thumb, middle, and index fingers for the past 8 months. This is beginning to interfere with his work as a financial analyst. He has a history of hypothyroidism for which he takes 75 micrograms of thyroxine daily. Other than that, his medical history is unremarkable. Which nerves are likely affected in this condition?
Your Answer: Median nerve
Explanation:To identify the affected nerve, it is crucial to accurately diagnose the underlying condition. The patient’s symptoms, such as numbness and tingling in the thumb and middle finger (and possibly the radial half of the ring finger), suggest carpal tunnel syndrome. Additionally, the patient’s occupation involving computer use and hypothyroidism are risk factors for this condition. Carpal tunnel syndrome occurs when the median nerve is compressed at the wrist within the carpal tunnel.
Understanding Carpal Tunnel Syndrome
Carpal tunnel syndrome is a condition that occurs when the median nerve in the carpal tunnel is compressed. Patients with this condition typically experience pain or pins and needles in their thumb, index, and middle fingers. In some cases, the symptoms may even ascend proximally. Patients often shake their hand to obtain relief, especially at night.
During an examination, doctors may observe weakness of thumb abduction and wasting of the thenar eminence (not the hypothenar). Tapping on the affected area may cause paraesthesia, which is known as Tinel’s sign. Flexion of the wrist may also cause symptoms, which is known as Phalen’s sign.
Carpal tunnel syndrome can be caused by a variety of factors, including idiopathic reasons, pregnancy, oedema (such as heart failure), lunate fracture, and rheumatoid arthritis. Electrophysiology tests may show prolongation of the action potential in both motor and sensory nerves.
Treatment for carpal tunnel syndrome may include a 6-week trial of conservative treatments, such as corticosteroid injections and wrist splints at night. If symptoms persist or are severe, surgical decompression (flexor retinaculum division) may be necessary.
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This question is part of the following fields:
- Musculoskeletal
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Question 12
Correct
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A 28-year-old African female arrives at the Emergency Department complaining of escalating pain in her shoulders and thighs over the past week. She also reports aggravated knee pain. She was recently diagnosed with tuberculosis and has been taking the required medications. Her musculoskeletal symptoms disappear after discontinuing isoniazid. What type of antibodies are linked to her condition?
Your Answer: Antihistone antibody
Explanation:The presence of antihistone antibodies is linked to drug-induced lupus, which is the likely cause of the patient’s symptoms. One of the drugs she was taking, isoniazid, is known to cause this condition. Rheumatoid factor is typically found in patients with rheumatoid arthritis, while anti Jo-1 antibody is associated with polymyositis and anti-Scl70 antibody is linked to diffuse systemic sclerosis.
Understanding Drug-Induced Lupus
Drug-induced lupus is a condition that shares some similarities with systemic lupus erythematosus, but not all of its typical features are present. Unlike SLE, renal and nervous system involvement is rare in drug-induced lupus. The good news is that this condition usually resolves once the drug causing it is discontinued.
The most common symptoms of drug-induced lupus include joint pain, muscle pain, skin rashes (such as the malar rash), and pulmonary issues like pleurisy. In terms of laboratory findings, patients with drug-induced lupus typically test positive for ANA (antinuclear antibodies) but negative for dsDNA (double-stranded DNA) antibodies. Anti-histone antibodies are found in 80-90% of cases, while anti-Ro and anti-Smith antibodies are only present in around 5% of cases.
The most common drugs that can cause drug-induced lupus are procainamide and hydralazine. Other less common culprits include isoniazid, minocycline, and phenytoin.
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This question is part of the following fields:
- Musculoskeletal
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Question 13
Incorrect
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A 29-year-old male complains of experiencing low back pain and stiffness for a few months now, with the worst symptoms occurring in the mornings. He reports that exercise helps alleviate the pain, but prolonged sitting at his desk exacerbates it. During the examination, there is limited lumbar flexion, and a pelvic X-ray reveals sacroiliitis. What is the best initial approach to managing this condition?
Your Answer: Methotrexate
Correct Answer: Ibuprofen
Explanation:Ankylosing spondylitis, a spondyloarthropathy associated with HLA-B27 and commonly seen in men aged 20-30, can be managed with exercise regimes and NSAIDs as the first line of treatment. Pelvic X-rays are helpful in identifying subchondral erosions and sclerosis in the commonly affected sacroiliac joints. Physiotherapy and NSAIDs like ibuprofen are recommended as the initial management. Intra-articular corticosteroid injections are useful for unilateral joint symptoms, while methotrexate may be considered for peripheral joint involvement. Paracetamol can be used in conjunction with NSAIDs if needed, but ibuprofen should be the first-line option.
Investigating and Managing Ankylosing Spondylitis
Ankylosing spondylitis is a type of spondyloarthropathy that is associated with HLA-B27. It is more commonly seen in males aged 20-30 years old. Inflammatory markers such as ESR and CRP are usually elevated, but normal levels do not necessarily rule out ankylosing spondylitis. HLA-B27 is not a reliable diagnostic tool as it can also be positive in normal individuals. The most effective way to diagnose ankylosing spondylitis is through a plain x-ray of the sacroiliac joints. However, if the x-ray is negative but suspicion for AS remains high, an MRI can be obtained to confirm the diagnosis.
Management of ankylosing spondylitis involves regular exercise, such as swimming, and the use of NSAIDs as the first-line treatment. Physiotherapy can also be helpful. Disease-modifying drugs used for rheumatoid arthritis, such as sulphasalazine, are only useful if there is peripheral joint involvement. Anti-TNF therapy, such as etanercept and adalimumab, should be given to patients with persistently high disease activity despite conventional treatments, according to the 2010 EULAR guidelines. Ongoing research is being conducted to determine whether anti-TNF therapies should be used earlier in the course of the disease. Spirometry may show a restrictive defect due to a combination of pulmonary fibrosis, kyphosis, and ankylosis of the costovertebral joints.
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This question is part of the following fields:
- Musculoskeletal
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Question 14
Correct
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Which of the following is not a risk factor for developing osteoporosis?
Your Answer: Obesity
Explanation:An elevated risk of developing osteoporosis is linked to low body mass, not obesity.
Understanding the Causes of Osteoporosis
Osteoporosis is a condition that affects the bones, making them weak and brittle. It is more common in women and older adults, with the prevalence increasing significantly in women over the age of 80. However, there are many other risk factors and secondary causes of osteoporosis that should be considered. Some of the most important risk factors include a history of glucocorticoid use, rheumatoid arthritis, alcohol excess, parental hip fracture, low body mass index, and smoking. Other risk factors include a sedentary lifestyle, premature menopause, certain ethnicities, and endocrine disorders such as hyperthyroidism and diabetes mellitus.
There are also medications that may worsen osteoporosis, such as SSRIs, antiepileptics, and proton pump inhibitors. If a patient is diagnosed with osteoporosis or has a fragility fracture, further investigations may be necessary to identify the cause and assess the risk of subsequent fractures. Recommended investigations include blood tests, bone densitometry, and other procedures as indicated. It is important to identify the cause of osteoporosis and contributory factors in order to select the most appropriate form of treatment. As a minimum, all patients should have a full blood count, urea and electrolytes, liver function tests, bone profile, CRP, and thyroid function tests.
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This question is part of the following fields:
- Musculoskeletal
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Question 15
Correct
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A 25-year-old woman presents to the Emergency Department with blurred vision. She mentions that she has been having recurrent painful ulcers in her mouth and genital area for the past four months. Her blood tests reveal elevated inflammatory markers.
Which of the following features points towards a diagnosis of Behçet’s disease?
Select the SINGLE best answer from the list below.
Your Answer: Positive pathergy test
Explanation:Clinical Signs and Tests for Behçet’s Disease: Understanding the Differences
Behçet’s disease is a rare autoimmune disorder that can be difficult to diagnose due to its non-specific symptoms. However, there are several clinical signs and tests that can help differentiate it from other conditions. Here are some of the key differences:
Positive Pathergy Test
The pathergy test involves inserting a needle into the skin and observing the site for the formation of a papule after 24-48 hours. A positive result is suggestive of Behçet’s disease. This is different from the Koebner phenomenon, which involves the appearance of new lesions on previously unaffected skin that are identical to the patient’s existing skin condition.
Auspitz Sign
The Auspitz sign is the presence of small bleeding points when layers of scales are removed. This is a hallmark of psoriasis, but not Behçet’s disease.
Koebner Phenomenon
As mentioned, the Koebner phenomenon involves the appearance of new lesions on previously unaffected skin that are identical to the patient’s existing skin condition. This is seen in psoriasis, vitiligo, and lichen planus, but not typically in Behçet’s disease.
Nikolsky Sign
The Nikolsky sign is used to differentiate between intra-epidermal and subepidermal blisters. It is a hallmark of certain skin conditions, such as pemphigus, toxic epidermal necrolysis, and staphylococcal scalded skin syndrome, but not Behçet’s disease.
Positive Mantoux Test
The Mantoux test is used to detect past infection with Mycobacterium tuberculosis. A positive result is not indicative of Behçet’s disease.
In summary, while there are some similarities between Behçet’s disease and other skin conditions, these clinical signs and tests can help differentiate it from other diagnoses.
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This question is part of the following fields:
- Musculoskeletal
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Question 16
Correct
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A 13-year-old boy experiences facial swelling and a red, itchy rash shortly after receiving the first dose of the HPV vaccine. Upon arrival, paramedics observe a bilateral expiratory wheeze and a blood pressure reading of 85/60 mmHg. According to the Gell and Coombs classification of hypersensitivity reactions, what type of reaction is this an example of?
Your Answer: Type I reaction
Explanation:Classification of Hypersensitivity Reactions
Hypersensitivity reactions are classified into four types according to the Gell and Coombs classification. Type I, also known as anaphylactic hypersensitivity, occurs when an antigen reacts with IgE bound to mast cells. This type of reaction is responsible for anaphylaxis and atopy, such as asthma, eczema, and hay fever. Type II, or cytotoxic hypersensitivity, happens when cell-bound IgG or IgM binds to an antigen on the cell surface. This type of reaction is associated with autoimmune hemolytic anemia, ITP, Goodpasture’s syndrome, and other conditions. Type III, or immune complex hypersensitivity, occurs when free antigen and antibody (IgG, IgA) combine to form immune complexes. This type of reaction is responsible for serum sickness, systemic lupus erythematosus, post-streptococcal glomerulonephritis, and extrinsic allergic alveolitis. Type IV, or delayed hypersensitivity, is T-cell mediated and is responsible for tuberculosis, graft versus host disease, allergic contact dermatitis, and other conditions.
In recent times, a fifth category has been added to the classification of hypersensitivity reactions. Type V hypersensitivity occurs when antibodies recognize and bind to cell surface receptors, either stimulating them or blocking ligand binding. This type of reaction is associated with Graves’ disease and myasthenia gravis. Understanding the different types of hypersensitivity reactions is important in diagnosing and treating various conditions. Proper identification of the type of reaction can help healthcare professionals provide appropriate treatment and management strategies.
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This question is part of the following fields:
- Musculoskeletal
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Question 17
Incorrect
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A 25-year-old gymnast complains of experiencing pain in her lateral forearm that worsens when she straightens her wrist or fingers. Additionally, she occasionally feels a peculiar sensation in her hand similar to pins and needles. During the examination, she displays tenderness below the common extensor origin, with no pain over the lateral epicondyle itself. What is the probable reason for her forearm pain?
Your Answer: Lateral epicondylitis
Correct Answer: Radial tunnel syndrome
Explanation:Radial tunnel syndrome and lateral epicondylitis have similar presentations, but radial tunnel syndrome causes pain distal to the epicondyle and worsens with elbow extension and forearm pronation. This can make it challenging to differentiate between the two conditions. Radial tunnel syndrome is more common in athletes who frequently hyperextend their wrists or perform supination/pronation movements, such as gymnasts, racquet players, and golfers. Patients may also experience hand paraesthesia or wrist aching. Cubital tunnel syndrome, on the other hand, causes tingling and numbness in the 4th and 5th fingers, while olecranon bursitis results in swelling over the posterior elbow.
Understanding Lateral Epicondylitis
Lateral epicondylitis, commonly known as tennis elbow, is a condition that often occurs after engaging in activities that the body is not accustomed to, such as painting or playing tennis. It is most prevalent in individuals aged 45-55 years and typically affects the dominant arm. The primary symptom of this condition is pain and tenderness localized to the lateral epicondyle. The pain is often exacerbated by wrist extension against resistance with the elbow extended or supination of the forearm with the elbow extended. Episodes of lateral epicondylitis can last between 6 months and 2 years, with patients experiencing acute pain for 6-12 weeks.
To manage lateral epicondylitis, it is essential to avoid muscle overload and engage in simple analgesia. Steroid injections and physiotherapy are also viable options for managing the condition. By understanding the symptoms and management options for lateral epicondylitis, individuals can take the necessary steps to alleviate pain and discomfort associated with this condition.
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This question is part of the following fields:
- Musculoskeletal
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Question 18
Correct
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A 48-year-old man presents with a painful erythematous fluctuant swelling over the posterior elbow. There is no history of trauma. He is in good health and has full range of motion at the elbow.
What is the most probable diagnosis?Your Answer: Olecranon bursitis
Explanation:The patient’s symptoms suggest olecranon bursitis, which is inflammation of the bursa over the olecranon process. This can be caused by trauma or may be idiopathic. The patient reports a posterior swelling at the elbow, which is tender and fluctuant. Management includes NSAIDs, RICE, and a compression bandage. If septic bursitis is suspected, antibiotics may be necessary. Golfer’s elbow, gout, and septic joint are less likely diagnoses. Tennis elbow, which is more common than golfer’s elbow, is characterized by pain in the lateral elbow and tenderness over the lateral epicondyle, but is not associated with a posterior swelling.
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This question is part of the following fields:
- Musculoskeletal
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Question 19
Incorrect
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A 55-year-old woman with a history of polymyalgia rheumatica has been taking prednisolone 10 mg for the past 6 months. A DEXA scan shows the following results:
L2 T-score -1.6 SD
Femoral neck T-score -1.7 SD
What is the most appropriate course of action?Your Answer: Vitamin D + calcium supplementation + repeat DEXA scan in 6 months
Correct Answer: Vitamin D + calcium supplementation + oral bisphosphonate
Explanation:Supplementation of vitamin D and calcium along with oral bisphosphonate.
Managing the Risk of Osteoporosis in Patients Taking Corticosteroids
Osteoporosis is a significant risk for patients taking corticosteroids, which are commonly used in clinical practice. To manage this risk appropriately, the 2002 Royal College of Physicians (RCP) guidelines provide a concise guide to prevention and treatment. According to these guidelines, the risk of osteoporosis increases significantly when a patient takes the equivalent of prednisolone 7.5mg a day for three or more months. Therefore, it is important to manage patients in an anticipatory manner, starting bone protection immediately if it is likely that the patient will need to take steroids for at least three months.
The RCP guidelines divide patients into two groups based on age and fragility fracture history. Patients over the age of 65 years or those who have previously had a fragility fracture should be offered bone protection. For patients under the age of 65 years, a bone density scan should be offered, with further management dependent on the T score. If the T score is greater than 0, patients can be reassured. If the T score is between 0 and -1.5, a repeat bone density scan should be done in 1-3 years. If the T score is less than -1.5, bone protection should be offered.
The first-line treatment for corticosteroid-induced osteoporosis is alendronate. Patients should also be replete in calcium and vitamin D. By following these guidelines, healthcare professionals can effectively manage the risk of osteoporosis in patients taking corticosteroids.
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This question is part of the following fields:
- Musculoskeletal
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Question 20
Incorrect
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A 50-year-old woman presents to you with a 3-week history of shoulder pain in both shoulders. A shoulder X-ray taken 2 weeks ago did not reveal any signs of osteoarthritis. Her blood tests show an elevated ESR of 50mm/hour. What is the most appropriate course of action for this probable diagnosis?
Your Answer: Prescribe a trial of oral prednisolone 15mg daily and arrange follow up after 1 month to assess clinical response
Correct Answer: Prescribe a trial of oral prednisolone 15mg daily and arrange follow up after 1 week to assess clinical response
Explanation:The symptoms exhibited by this patient strongly indicate the presence of polymyalgia rheumatica, and thus, a one-week course of steroids should be administered to produce a significant improvement. Prescribing paracetamol for a month is unlikely to yield any noticeable relief. An MRI scan is not likely to aid in the diagnosis. Administering a prolonged course of steroids without periodic review is not recommended.
Polymyalgia Rheumatica: A Condition of Muscle Stiffness in Older People
Polymyalgia rheumatica (PMR) is a common condition that affects older people. It is characterized by muscle stiffness and elevated inflammatory markers. Although it is closely related to temporal arteritis, the underlying cause is not fully understood, and it does not appear to be a vasculitic process. PMR typically affects patients over the age of 60 and has a rapid onset, usually within a month. Patients experience aching and morning stiffness in proximal limb muscles, along with mild polyarthralgia, lethargy, depression, low-grade fever, anorexia, and night sweats.
To diagnose PMR, doctors look for raised inflammatory markers, such as an ESR of over 40 mm/hr. Creatine kinase and EMG are normal. Treatment for PMR involves prednisolone, usually at a dose of 15mg/od. Patients typically respond dramatically to steroids, and failure to do so should prompt consideration of an alternative diagnosis.
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This question is part of the following fields:
- Musculoskeletal
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Question 21
Correct
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A 56-year-old man is recuperating after experiencing his initial bout of gout. He continues to experience some persistent discomfort in his big toe. He has no predisposing factors for gout and no signs of gouty tophi upon examination. At what point would it be appropriate to initiate uric acid-lowering treatment?
Your Answer: Once his symptoms of acute gout have resolved
Explanation:It is now recommended to offer allopurinol to all patients after their first gout attack, without delay. However, it is advised to wait until the inflammation has subsided before discussing urate-lowering therapy with the patient. If the attacks are too frequent, allopurinol can be considered even before the inflammation has completely settled. These recommendations are provided by the 2017 British Society for Rheumatology and NICE Clinical Knowledge Summaries.
Gout is caused by chronic hyperuricaemia and is managed acutely with NSAIDs or colchicine. Urate-lowering therapy (ULT) is recommended for patients with >= 2 attacks in 12 months, tophi, renal disease, uric acid renal stones, or prophylaxis if on cytotoxics or diuretics. Allopurinol is first-line ULT, with an initial dose of 100 mg od and titrated to aim for a serum uric acid of < 300 µmol/l. Lifestyle modifications include reducing alcohol intake, losing weight if obese, and avoiding high-purine foods. Consideration should be given to stopping precipitating drugs and losartan may be suitable for patients with coexistent hypertension.
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This question is part of the following fields:
- Musculoskeletal
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Question 22
Correct
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As a doctor in the emergency department, you encounter a 42-year-old man who complains of new left leg tingling and weakness. He reports that three days ago he was independent and walking normally. The patient has a medical history of type 2 diabetes mellitus and takes insulin.
Upon examination, the patient has a heart rate of 121 beats per minute, a blood pressure of 101/72 mmHg, and a temperature of 38.3ºC. The right leg has 4/5 power throughout, while sensation is altered over the right anterior thigh and knee. The left leg has 4/5 power in hip flexion and extension, 3/5 power in knee flexion, knee extension, and ankle dorsiflexion, and 0/5 power in great toe extension and plantarflexion. Sensation is altered on the left over the thigh and knee, but absent to both light touch and pin prick in the left foot.
What is the most likely diagnosis for this patient?Your Answer: Lumbar epidural abscess
Explanation:The patient is displaying signs of sepsis and a developing neurological deficit in their lower limbs, which could indicate the presence of an epidural abscess. This is particularly likely given the patient’s history of diabetes, which is a known risk factor for this condition. While a diabetic foot can also cause neurological deficits and sepsis, the distribution of symptoms would be different and not affect the proximal limb on the opposite side. Discitis with a pathological fracture is also a possibility, but the absence of pain makes this less likely. Intracranial pathology is unlikely as the neurological deficit is confined to the lower limbs and there are no other systemic neurological symptoms present.
Understanding Discitis: Causes, Symptoms, Diagnosis, and Treatment
Discitis is a condition characterized by an infection in the intervertebral disc space, which can lead to serious complications such as sepsis or an epidural abscess. The most common cause of discitis is bacterial, with Staphylococcus aureus being the most frequent culprit. However, it can also be caused by viral or aseptic factors. The symptoms of discitis include back pain, pyrexia, rigors, and sepsis. In some cases, neurological features such as changing lower limb neurology may occur if an epidural abscess develops.
To diagnose discitis, imaging tests such as MRI are used due to their high sensitivity. A CT-guided biopsy may also be required to guide antimicrobial treatment. The standard therapy for discitis involves six to eight weeks of intravenous antibiotic therapy. The choice of antibiotic depends on various factors, with the most important being the identification of the organism through a positive culture, such as a blood culture or CT-guided biopsy.
Complications of discitis include sepsis and epidural abscess. Therefore, it is essential to assess the patient for endocarditis, which can be done through transthoracic echo or transesophageal echo. Discitis is usually due to haematogenous seeding of the vertebrae, which implies that the patient has had a bacteraemia, and seeding could have occurred elsewhere. Understanding the causes, symptoms, diagnosis, and treatment of discitis is crucial in managing this condition and preventing its complications.
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This question is part of the following fields:
- Musculoskeletal
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Question 23
Correct
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A 19-year-old male arrives at the emergency department with complaints of hand pain after punching a wall. He reports swelling and pain on the ulnar side of his hand. Based on his injury mechanism, what is the most probable diagnosis?
Your Answer: 5th metacarpal 'Boxer's' fracture
Explanation:When a person punches a hard surface, they may suffer from a ‘Boxer fracture’, which is a type of 5th metacarpal fracture that is usually only slightly displaced.
Boxer fracture is a type of fracture that occurs in the fifth metacarpal bone. It is usually caused by punching a hard surface, such as a wall, and results in a minimally displaced fracture. This means that the bone is broken but the pieces are still in alignment and have not moved significantly out of place. The injury is named after boxers because it is a common injury in this sport, but it can also occur in other activities that involve punching or striking objects. Proper treatment and management of a boxer fracture is important to ensure proper healing and prevent long-term complications.
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This question is part of the following fields:
- Musculoskeletal
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Question 24
Incorrect
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A 7 year-old girl from Sierra Leone presents with a 2 week history of painful left leg. She is homozygous for sickle cell disease. On examination the child is febrile at 39.8ºC and there is bony tenderness over the left tibial shaft. Investigations are:
Hb 6.9 g/dL
Blood culture Gram positive cocci
X-ray left tibia: Osteomyelitis - destruction of bony cortex with periosteal reaction.
What is the most likely responsible pathogen?Your Answer: Staphylococcus Aureus
Correct Answer: Non-typhi Salmonella
Explanation:Non-typhi salmonella (NTS) is known to cause blood and bone infections, particularly in children with sickle cell disease and malaria. The exact reason for this susceptibility is not fully understood, but it may be due to the bacteria’s affinity for iron, which is made available through haemolysis. Other bacteria such as E.coli and P. aeruginosa are not commonly associated with sickle cell disease, and Staphylococcus aureus is a gram-positive coccus. Aplastic anaemia and parvovirus can be ruled out as causes, as the child’s haemoglobin level is normal and parvovirus does not cause osteomyelitis.
Understanding Osteomyelitis: Types, Causes, and Treatment
Osteomyelitis is a bone infection that can be classified into two types: haematogenous and non-haematogenous. Haematogenous osteomyelitis is caused by bacteria that enter the bloodstream and is usually monomicrobial. It is more common in children, with vertebral osteomyelitis being the most common form in adults. Risk factors include sickle cell anaemia, intravenous drug use, immunosuppression, and infective endocarditis. On the other hand, non-haematogenous osteomyelitis results from the spread of infection from adjacent soft tissues or direct injury to the bone. It is often polymicrobial and more common in adults, with risk factors such as diabetic foot ulcers, pressure sores, diabetes mellitus, and peripheral arterial disease.
Staphylococcus aureus is the most common cause of osteomyelitis, except in patients with sickle-cell anaemia where Salmonella species predominate. To diagnose osteomyelitis, MRI is the imaging modality of choice, with a sensitivity of 90-100%. Treatment for osteomyelitis involves a six-week course of flucloxacillin. Clindamycin is an alternative for patients who are allergic to penicillin.
In summary, osteomyelitis is a bone infection that can be caused by bacteria entering the bloodstream or spreading from adjacent soft tissues or direct injury to the bone. It is more common in children and adults with certain risk factors. Staphylococcus aureus is the most common cause, and MRI is the preferred imaging modality for diagnosis. Treatment involves a six-week course of flucloxacillin or clindamycin for penicillin-allergic patients.
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This question is part of the following fields:
- Musculoskeletal
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Question 25
Incorrect
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A 20-year-old runner has approached you for advice after being diagnosed with a stress fracture in her left tibia. She is seeking guidance on how to reduce her risk of future stress fractures. What are the risk factors that athletic females are most susceptible to when it comes to developing stress fractures?
Your Answer: Inadequate calorie intake, combined oral contraceptive use and intense activity
Correct Answer: Inadequate calorie intake, menstrual irregularities and increased or new exercise intensity
Explanation:Women with low calorie intake or menstrual irregularities who increase their exercise are at risk of stress fractures due to the female athlete triad, which includes excessive exercise, reduced bone mineral density, and eating disorders or inadequate calorie intake. It is important to discuss eating habits and menstrual cycles when treating women with a history of stress fractures.
Stress fractures are small hairline fractures that can occur due to repetitive activity and loading of normal bone. Although they can be painful, they are typically not displaced and do not cause surrounding soft tissue injury. In some cases, stress fractures may present late, and callus formation may be visible on radiographs. Treatment for stress fractures may vary depending on the severity of the injury. In cases where the injury is associated with severe pain and presents at an earlier stage, immobilization may be necessary. However, injuries that present later may not require formal immobilization and can be treated with tailored immobilization specific to the site of injury.
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This question is part of the following fields:
- Musculoskeletal
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Question 26
Incorrect
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Which one of the following statements regarding juvenile idiopathic arthritis is accurate?
Your Answer: HLA-B27 is positive in 50% of patients
Correct Answer: Achilles tendonitis is a recognised association
Explanation:Ankylosing spondylitis is a type of spondyloarthropathy that is associated with HLA-B27. It is more commonly seen in young males, with a sex ratio of 3:1, and typically presents with lower back pain and stiffness that develops gradually. The stiffness is usually worse in the morning and improves with exercise, while pain at night may improve upon getting up. Clinical examination may reveal reduced lateral and forward flexion, as well as reduced chest expansion. Other features associated with ankylosing spondylitis include apical fibrosis, anterior uveitis, aortic regurgitation, Achilles tendonitis, AV node block, amyloidosis, cauda equina syndrome, and peripheral arthritis (more common in females).
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This question is part of the following fields:
- Musculoskeletal
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Question 27
Incorrect
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A 42-year-old woman is admitted to the gastroenterology ward with persistent bloody diarrhoea, abdominal pain and fever. She has a history of Crohn's disease and is suspected to be experiencing an acute flare. Methotrexate is prescribed as part of her treatment. What potential side-effect should be monitored for?
Your Answer: Telogen effluvium
Correct Answer: Pneumonitis
Explanation:Methotrexate has the potential to cause pneumonitis, which is characterized by symptoms such as cough, fever, and difficulty breathing. Failure to promptly identify and treat pneumonitis can result in permanent lung damage. Therefore, the British National Formulary advises patients to seek medical attention if they experience any of these symptoms, and physicians should monitor for signs of pneumonitis during each visit and discontinue the medication if it is suspected. It should be noted that acute respiratory distress syndrome is not a known side effect of methotrexate.
Methotrexate: An Antimetabolite with Potentially Life-Threatening Side Effects
Methotrexate is an antimetabolite drug that inhibits the enzyme dihydrofolate reductase, which is essential for the synthesis of purines and pyrimidines. It is commonly used to treat inflammatory arthritis, psoriasis, and some types of leukemia. However, it is considered an important drug due to its potential for life-threatening side effects. Careful prescribing and close monitoring are essential to ensure patient safety.
The adverse effects of methotrexate include mucositis, myelosuppression, pneumonitis, pulmonary fibrosis, and liver fibrosis. The most common pulmonary manifestation is pneumonitis, which typically develops within a year of starting treatment and presents with non-productive cough, dyspnea, malaise, and fever. Women should avoid pregnancy for at least 6 months after treatment has stopped, and men using methotrexate need to use effective contraception for at least 6 months after treatment.
When prescribing methotrexate, it is important to follow guidelines and monitor patients regularly. Methotrexate is taken weekly, and FBC, U&E, and LFTs need to be regularly monitored. The starting dose is 7.5 mg weekly, and folic acid 5mg once weekly should be co-prescribed, taken more than 24 hours after the methotrexate dose. Only one strength of methotrexate tablet should be prescribed, usually 2.5 mg. It is also important to avoid prescribing trimethoprim or co-trimoxazole concurrently, as it increases the risk of marrow aplasia, and high-dose aspirin increases the risk of methotrexate toxicity.
In case of methotrexate toxicity, the treatment of choice is folinic acid. Methotrexate is a drug with a high potential for patient harm, and it is crucial to be familiar with guidelines relating to its use to ensure patient safety.
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This question is part of the following fields:
- Musculoskeletal
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Question 28
Correct
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A 67-year-old man complains of bilateral leg pain that occurs during walking. He has a history of peptic ulcer disease and osteoarthritis. The pain usually starts after walking for about 5 minutes and goes away when he sits down. He has noticed that leaning forward or crouching helps relieve the pain. There are no abnormalities found during musculoskeletal and vascular examination of his lower limbs. What is the probable diagnosis?
Your Answer: Spinal stenosis
Explanation:This presentation is typical of spinal stenosis. Although peripheral arterial disease is a possible alternative diagnosis, the pain relief factors and absence of abnormalities in the vascular examination suggest otherwise.
Lower back pain is a common issue that is often caused by muscular strain. However, it is important to be aware of potential underlying causes that may require specific treatment. Certain red flags should be considered, such as age under 20 or over 50, a history of cancer, night pain, trauma, or systemic illness. There are also specific causes of lower back pain that should be kept in mind. Facet joint pain may be acute or chronic, worse in the morning and on standing, and typically worsens with back extension. Spinal stenosis may cause leg pain, numbness, and weakness that is worse on walking and relieved by sitting or leaning forward. Ankylosing spondylitis is more common in young men and causes stiffness that is worse in the morning and improves with activity. Peripheral arterial disease may cause pain on walking and weak foot pulses. It is important to consider these potential causes and seek appropriate diagnosis and treatment.
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This question is part of the following fields:
- Musculoskeletal
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Question 29
Correct
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A 16-year-old girl comes to the clinic with symptoms of urticarial rash, angioedema, and wheezing. According to her mother, she had recently attended her younger sister's party and had been assisting in inflating balloons. What could be the probable diagnosis?
Your Answer: Latex allergy
Explanation:Latex allergy often presents as a Type I hypersensitivity reaction, which can lead to anaphylaxis. In such cases, it is crucial to administer adrenaline promptly and follow standard anaphylaxis management protocols.
Classification of Hypersensitivity Reactions
Hypersensitivity reactions are classified into four types according to the Gell and Coombs classification. Type I, also known as anaphylactic hypersensitivity, occurs when an antigen reacts with IgE bound to mast cells. This type of reaction is responsible for anaphylaxis and atopy, such as asthma, eczema, and hay fever. Type II, or cytotoxic hypersensitivity, happens when cell-bound IgG or IgM binds to an antigen on the cell surface. This type of reaction is associated with autoimmune hemolytic anemia, ITP, Goodpasture’s syndrome, and other conditions. Type III, or immune complex hypersensitivity, occurs when free antigen and antibody (IgG, IgA) combine to form immune complexes. This type of reaction is responsible for serum sickness, systemic lupus erythematosus, post-streptococcal glomerulonephritis, and extrinsic allergic alveolitis. Type IV, or delayed hypersensitivity, is T-cell mediated and is responsible for tuberculosis, graft versus host disease, allergic contact dermatitis, and other conditions.
In recent times, a fifth category has been added to the classification of hypersensitivity reactions. Type V hypersensitivity occurs when antibodies recognize and bind to cell surface receptors, either stimulating them or blocking ligand binding. This type of reaction is associated with Graves’ disease and myasthenia gravis. Understanding the different types of hypersensitivity reactions is important in diagnosing and treating various conditions. Proper identification of the type of reaction can help healthcare professionals provide appropriate treatment and management strategies.
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This question is part of the following fields:
- Musculoskeletal
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Question 30
Incorrect
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A 60-year-old African American male presents with widespread bone pain and muscle weakness. Upon investigation, the following results were obtained:
Calcium 2.05 mmol/l
Phosphate 0.68 mmol/l
ALP 340 U/l
What is the probable diagnosis?Your Answer: Myeloma
Correct Answer: Osteomalacia
Explanation:Osteomalacia may be indicated by bone pain, tenderness, and proximal myopathy (resulting in a waddling gait), as well as low levels of calcium and phosphate and elevated alkaline phosphatase.
Understanding Osteomalacia
Osteomalacia is a condition that occurs when the bones become soft due to low levels of vitamin D, which leads to a decrease in bone mineral content. This condition is commonly seen in adults, while in growing children, it is referred to as rickets. The causes of osteomalacia include vitamin D deficiency, malabsorption, lack of sunlight, chronic kidney disease, drug-induced factors, inherited conditions, liver disease, and coeliac disease.
The symptoms of osteomalacia include bone pain, muscle tenderness, fractures, especially in the femoral neck, and proximal myopathy, which may lead to a waddling gait. To diagnose osteomalacia, blood tests are conducted to check for low vitamin D levels, low calcium and phosphate levels, and raised alkaline phosphatase levels. X-rays may also show translucent bands known as Looser’s zones or pseudofractures.
The treatment for osteomalacia involves vitamin D supplementation, with a loading dose often needed initially. Calcium supplementation may also be necessary if dietary calcium intake is inadequate. Understanding the causes, symptoms, and treatment options for osteomalacia is crucial in managing this condition effectively.
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This question is part of the following fields:
- Musculoskeletal
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Question 31
Incorrect
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A 60-year-old man complains of worsening pain and swelling in both knees with stiffness and decreased mobility over the past eight months. He also has painful wrist joints with nodules at the proximal and distal interphalangeal joints which have developed slowly over the past two years.
Which of the following is the most likely diagnosis?Your Answer: Rheumatoid arthritis (RA)
Correct Answer: Osteoarthritis (OA)
Explanation:Differentiating between types of arthritis: A case study
In this case study, a patient presents with bony swelling at the DIP and PIP joints of the hands. It is important to differentiate between various types of arthritis to make an accurate diagnosis and provide appropriate treatment.
Osteoarthritis (OA) is characterized by loss of articular cartilage and overgrowth of underlying bone, commonly affecting the hips, knees, and small hand joints. Pain and swelling are common presenting features, along with crepitus on examination. Heberden’s and Bouchard’s nodes may also be present.
Osteoporosis, on the other hand, is a condition of reduced bone density and increased fragility, often diagnosed following a low-impact fracture or screening of high-risk patients. Pain and bony swelling are not typical features of osteoporosis.
Psoriatic arthritis is an inflammatory seronegative spondyloarthropathy associated with psoriasis, commonly affecting the hands but not causing the changes described in this case. Dactylitis is a usual examination finding with psoriatic arthritis.
Reactive arthritis is characterized by a triad of urethritis, conjunctivitis, and arthritis following an infection. It typically presents as an acute, asymmetrical lower-limb arthritis, occurring a few days to weeks after the initial infection.
Rheumatoid arthritis (RA) presents most often in women between the ages of 35 and 55 with symmetrical polyarticular arthritis, most often in the small joints of the hands or feet. Swelling is present at the metacarpophalangeal and PIP joints of the hands, along with other signs such as swan neck and Boutonnière deformities of the fingers, ulnar deviation of fingers, and Z deformity of the thumb.
In conclusion, careful examination and consideration of various types of arthritis are necessary for an accurate diagnosis and appropriate treatment plan.
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This question is part of the following fields:
- Musculoskeletal
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Question 32
Correct
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As a general practice doctor, you see a 35-year-old plumber who complains of shooting pains down his left leg for the past 3 weeks. The pain has been increasing in intensity and over the counter analgesia has not helped. The patient has no past medical history and takes no regular medications. During examination, you find normal power in both legs but altered sensation over the great toe on his left. There are no urinary symptoms or perianal sensation issues. An MRI scan of his lumbar spine shows a small left paracentral L4/5 disc prolapse causing compression of the transiting L5 nerve root. There is no compression of the cauda equina with CSF visible around all nerve roots. What is the most appropriate next step in managing this patient?
Your Answer: Start treatment with NSAIDs and refer for physiotherapy
Explanation:Most cases of sciatica can be resolved within 3 months through conservative treatment, and specialist referral is rarely necessary. However, if the pain persists after 4-6 weeks of physiotherapy and anti-neuropathic medication, referral to spinal surgery may be considered. Discharging the patient without proper intervention is not recommended as there is a risk of symptoms worsening and developing cauda equina syndrome. Patients should be advised to seek emergency care if they experience peri-anal or saddle sensory changes, difficulty urinating, or symptoms affecting both legs. Opiates are not recommended for neuropathic pain and may lead to dependence. Instead, a more appropriate and effective pain reliever for the patient’s age would be a non-steroidal anti-inflammatory drug (NSAID) like naproxen.
Understanding Prolapsed Disc and its Features
A prolapsed lumbar disc is a common cause of lower back pain that can lead to neurological deficits. It is characterized by clear dermatomal leg pain, which is usually worse than the back pain. The pain is often aggravated when sitting. The features of the prolapsed disc depend on the site of compression. For instance, L3 nerve root compression can cause sensory loss over the anterior thigh, weak quadriceps, reduced knee reflex, and a positive femoral stretch test. On the other hand, L4 nerve root compression can lead to sensory loss in the anterior aspect of the knee, weak quadriceps, reduced knee reflex, and a positive femoral stretch test.
The management of prolapsed disc is similar to that of other musculoskeletal lower back pain. It involves analgesia, physiotherapy, and exercises. According to NICE, the first-line treatment for back pain without sciatica symptoms is NSAIDs +/- proton pump inhibitors, rather than neuropathic analgesia. If the symptoms persist after 4-6 weeks, referral for consideration of MRI is appropriate. Understanding the features of prolapsed disc can help in the diagnosis and management of this condition.
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This question is part of the following fields:
- Musculoskeletal
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Question 33
Incorrect
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A 68-year-old woman presents with a 2-week history of fatigue, pain and stiffness in her hips and shoulders, low mood, and loss of appetite. The pain and stiffness is worst first thing in the morning. Blood tests are shown below:
Hb 126 g/L
Male: (135-180)
Female: (115 - 160)
Platelets 288 * 109/L
(150 - 400)
WBC 9.8 * 109/L
(4.0 - 11.0)
ESR 78 mm/hr
Men: < (age / 2)
Women: < ((age + 10) / 2)
CRP 56 mg/L
(< 5)
The patient is suspected to have polymyalgia rheumatica and is started on prednisolone. However, after 3 weeks, her symptoms have not improved. What is the most appropriate next step?Your Answer: Increase dose of prednisolone
Correct Answer: Consider an alternative diagnosis
Explanation:If a patient with polymyalgia rheumatica does not respond well to steroids, it is important to consider other possible diagnoses. Typically, patients with this condition experience a dramatic improvement in symptoms within two weeks of starting steroid treatment. Therefore, if there is no response, it is unlikely that polymyalgia rheumatica is the correct diagnosis. Other conditions that may be considered include rheumatoid arthritis, hypothyroidism, fibromyalgia, and polymyositis. Continuing with the same dose of prednisolone or increasing the dose is not recommended, as there should have been some response to the initial dose if polymyalgia rheumatica was present. Similarly, replacing oral prednisolone with IV methylprednisolone is not appropriate if there has been no response to the oral medication. Methotrexate is a second-line treatment option for polymyalgia rheumatica, but it is not the most appropriate next step if the diagnosis is uncertain.
Polymyalgia Rheumatica: A Condition of Muscle Stiffness in Older People
Polymyalgia rheumatica (PMR) is a common condition that affects older people. It is characterized by muscle stiffness and elevated inflammatory markers. Although it is closely related to temporal arteritis, the underlying cause is not fully understood, and it does not appear to be a vasculitic process. PMR typically affects patients over the age of 60 and has a rapid onset, usually within a month. Patients experience aching and morning stiffness in proximal limb muscles, along with mild polyarthralgia, lethargy, depression, low-grade fever, anorexia, and night sweats.
To diagnose PMR, doctors look for raised inflammatory markers, such as an ESR of over 40 mm/hr. Creatine kinase and EMG are normal. Treatment for PMR involves prednisolone, usually at a dose of 15mg/od. Patients typically respond dramatically to steroids, and failure to do so should prompt consideration of an alternative diagnosis.
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This question is part of the following fields:
- Musculoskeletal
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Question 34
Correct
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Treatment of an acute attack of gout with allopurinol may result in which of the following?
Select the SINGLE result from the list below.Your Answer: Exacerbation and prolongation of the attack
Explanation:To effectively treat gout, it is important to understand the proper use of allopurinol. Starting prophylactic treatment with allopurinol should be delayed until 1-2 weeks after the inflammation has settled to avoid exacerbating and prolonging the attack. It may take several weeks to reduce uric acid levels to normal, and the dose should be titrated every few weeks until sUA levels are below 300 mmol/l. It is not recommended to start allopurinol during an acute attack, as it is unlikely to lead to complete remission of symptoms. Allopurinol use is not associated with an increased risk of acute pyelonephritis, but renal impairment may occur if the starting dose is too high. In mild cases, self-care may be considered, but if drug treatment is necessary, NSAIDs or colchicine can be prescribed. It is important to measure the baseline sUA level and consider prophylaxis in high-risk patients. When starting allopurinol, a low dose of NSAID or colchicine should be co-prescribed for at least 1 month to prevent acute attacks of gout.
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This question is part of the following fields:
- Musculoskeletal
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Question 35
Correct
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A 45-year-old woman develops significantly increasing pain in her leg one day postoperatively following surgery for a tibial shaft fracture. The plaster cast is removed and examination reveals tender swelling of her lower leg. All distal pulses are present and the foot and leg are warm. Pain is significantly worse with passive extension of the toes.
Which of the following is the most likely diagnosis?
Your Answer: Acute compartment syndrome
Explanation:Differential Diagnosis for a Swollen Calf: Understanding Acute Compartment Syndrome and Other Potential Causes
A swollen calf can be a concerning symptom, especially following trauma or surgery on the lower limb. One potential cause is acute compartment syndrome, which is a surgical emergency that can lead to limb-threatening complications. This condition occurs when pressure within a closed fascial compartment increases and compromises the neurovascular supply to the muscles within that compartment. Other potential causes of a swollen calf include a ruptured Baker’s cyst, acute limb ischaemia, cellulitis, and deep vein thrombosis (DVT). Understanding the clinical features and differential diagnosis of these conditions is crucial for prompt and appropriate management.
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This question is part of the following fields:
- Musculoskeletal
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Question 36
Correct
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A 26-year-old male patient presents to the emergency department after falling on his left hand. He reports experiencing pain in his hand, specifically in the anatomical snuffbox. Despite an x-ray being taken 2 hours after the fall, no fractures were detected in any of his carpal bones, and he was discharged with pain relief. However, he returns 10 days later, complaining of persistent pain and extreme tenderness in the anatomical snuffbox of his left hand. What is the most probable diagnosis?
Your Answer: Scaphoid fracture
Explanation:Fractures in the anatomical snuffbox area can be difficult to detect on x-rays immediately after a fall on the outstretched hand. However, the fracture line may become visible several days later, and patients may experience persistent pain in the area. It is crucial to identify these fractures promptly to prevent non-union and avascular necrosis. It is important to note that a Colles fracture, which also occurs after a fall on the outstretched hand, does not cause pain in the anatomical snuffbox. Similarly, a Barton’s fracture, which is intraarticular in nature, can be seen clearly on initial x-rays and does not cause pain in the anatomical snuffbox.
Upper limb fractures can occur due to various reasons, such as falls or impacts. One such fracture is Colles’ fracture, which is caused by a fall onto extended outstretched hands. This fracture is characterized by a dinner fork type deformity and has three features, including a transverse fracture of the radius, one inch proximal to the radio-carpal joint, and dorsal displacement and angulation. Another type of fracture is Smith’s fracture, which is a reverse Colles’ fracture and is caused by falling backwards onto the palm of an outstretched hand or falling with wrists flexed. This fracture results in volar angulation of the distal radius fragment, also known as the Garden spade deformity.
Bennett’s fracture is an intra-articular fracture at the base of the thumb metacarpal, caused by an impact on a flexed metacarpal, such as in fist fights. On an X-ray, a triangular fragment can be seen at the base of the metacarpal. Monteggia’s fracture is a dislocation of the proximal radioulnar joint in association with an ulna fracture, caused by a fall on an outstretched hand with forced pronation. It requires prompt diagnosis to avoid disability. Galeazzi fracture is a radial shaft fracture with associated dislocation of the distal radioulnar joint, occurring after a fall on the hand with a rotational force superimposed on it. Barton’s fracture is a distal radius fracture (Colles’/Smith’s) with associated radiocarpal dislocation, caused by a fall onto an extended and pronated wrist.
Scaphoid fractures are the most common carpal fractures and occur due to a fall onto an outstretched hand, with the tubercle, waist, or proximal 1/3 being at risk. The surface of the scaphoid is covered by articular cartilage, with a small area available for blood vessels, increasing the risk of fracture. The main physical signs of scaphoid fractures are swelling and tenderness in the anatomical snuff box, pain on wrist movements, and longitudinal compression of the thumb. An ulnar deviation AP is needed for visualization of scaphoid, and immobilization of scaphoid fractures can be difficult. Finally, a radial head fracture is common in young adults and is usually caused by a fall on the outstretched hand. It is characterized by marked local tenderness over
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This question is part of the following fields:
- Musculoskeletal
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Question 37
Correct
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A 25-year-old man presents with sudden onset of pain in his right elbow and left Achilles tendon. He reports dysuria, conjunctivitis, and fever, and recently returned from a trip to the Far East where he had unprotected sex. He has also developed macules and pustules on his hands. What is the most likely diagnosis?
Your Answer: Reactive arthritis
Explanation:Reactive arthritis is a type of arthritis that occurs after an infection, typically dysentery or a sexually transmitted disease. It affects 1-2% of patients who have had these infections, with Salmonella, Shigella, and Yersinia causing diarrheal illness that can lead to reactive arthritis, and Chlamydia trichomonas and Ureaplasma urealyticum causing STDs. Those who are HLA-B27-positive are at a higher risk of developing reactive arthritis. Symptoms include acute, asymmetrical lower limb arthritis, enthesitis causing plantar fasciitis or Achilles tendinosis, and back pain from sacroiliitis and spondylosis. Other symptoms may include acute anterior uveitis, circinate balanitis, keratoderma blenorrhagia, nail dystrophy, mouth ulcers, and bilateral conjunctivitis. The classic triad of conjunctivitis, urethritis, and arthritis may also be present. In this scenario, the patient’s symptoms and history of unprotected sexual intercourse suggest reactive arthritis as the correct diagnosis. Other potential diagnoses, such as UTI, HIV, psoriatic arthritis, and syphilitic arthritis, can be ruled out based on the patient’s symptoms and history.
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This question is part of the following fields:
- Musculoskeletal
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Question 38
Incorrect
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A 32-year-old woman reports experiencing discomfort in the plantar midfoot area between the third and fourth toes while wearing high heels.
What is the most probable reason for her symptoms?Your Answer: Plantar fasciitis
Correct Answer: Morton’s neuroma
Explanation:Common Foot Conditions and Their Symptoms
Morton’s Neuroma: This condition is characterized by perineural fibrosis and common digital nerve degeneration, resulting in neuropathic pain in the forefoot and interdigital space. The third web space is most commonly affected, and pain is aggravated by narrow, tight, high-heeled shoes. Treatment involves local steroid injections and footwear advice.
Claw Toe: In this condition, there is MTP dorsiflexion with PIP and DIP flexion affecting any of the second to fifth toes. Patients often report pain at the PIP joint due to pressure from a shoe on the toe.
Achilles Tendonitis: This results in activity-related pain and swelling of the Achilles tendon, felt at the lower calf. The toes are unaffected. Management includes rest, NSAIDs, heel padding, physiotherapy, and steroid injections.
Hammer Toe: This is a deformity of the second, third, or fourth toe, characterized by progressive PIP flexion deformity and compensatory hyperextension of the MTP and DIP joints. The PIP joint becomes prominent dorsally, causing pain when rubbing against the shoe.
Plantar Fasciitis: This is a pain in the inferior heel at the attachment of the medial band of the plantar fascia to the medial calcaneal tubercle. It is a chronic inflammatory process and an overuse injury, with pain worst in the morning. Treatment involves shoes with arch support, soft heels and heel padding, regular stretching exercises, NSAIDs, and local steroid injections.
Understanding Common Foot Conditions and Their Symptoms
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This question is part of the following fields:
- Musculoskeletal
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Question 39
Correct
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A 4-year-old boy is brought to the Paediatric Emergency Department with a fever of one week. On evaluation, the child appears unwell, erythema of the palms and soles are noted, along with bilateral conjunctivitis. Examination of the oral cavity reveals cracked lips.
In addition to the above findings, which one of the following features would prompt an urgent referral for echocardiography?Your Answer: Rash on the trunk and extremities
Explanation:Clinical Features and Differential Diagnoses of Kawasaki Disease
Kawasaki disease is a rare but serious condition that primarily affects children under the age of five. To diagnose Kawasaki disease, a patient must have a fever for at least five days and four out of five classical features: bilateral, non-exudative conjunctival injection, changes in lips and oral cavity, oedema and erythema in the hands and feet, polymorphous rash, and cervical lymphadenopathy. However, tonsillar exudate, leukopenia, neck stiffness, and small submental lymph nodes are not classical features of Kawasaki disease and should prompt consideration of other differential diagnoses. Patients with confirmed Kawasaki disease should undergo echocardiographic examination to detect potential coronary artery aneurysms. Early diagnosis and treatment are crucial to prevent serious complications.
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This question is part of the following fields:
- Musculoskeletal
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Question 40
Correct
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A 32-year-old female patient complains of gradual tingling and numbness in her right hand's 4th and 5th fingers. The symptoms were occasional at first, but now they are persistent. She observes that the discomfort intensifies when she rests her right elbow on a surface. She remembers hitting her elbow against a door a while back. What is the probable diagnosis?
Your Answer: Cubital tunnel syndrome
Explanation:Cubital tunnel syndrome is a condition that occurs when the ulnar nerve is compressed, resulting in tingling and numbness in the fourth and fifth fingers.
The correct answer is cubital tunnel syndrome. The ulnar nerve passes through the cubital tunnel, and when it is compressed, it can cause the symptoms described, such as tingling and numbness in the fourth and fifth fingers. Treatment for this condition may involve conservative measures, but surgery may be necessary in some cases.
Carpal tunnel syndrome, on the other hand, is caused by compression of the median nerve at the wrist, leading to pain and tingling in the hand and wrist, rather than specific fingers.
De Quervain’s tenosynovitis presents differently, with pain occurring during movement of the thumb and wrist, and the radial styloid may become thickened and hardened.
Medial epicondylitis, or golfer’s elbow, causes pain in the medial elbow area, near the cubital tunnel, but it is a tendinopathy rather than nerve compression. The pain is localized to the affected area.
Understanding Cubital Tunnel Syndrome
Cubital tunnel syndrome is a condition that occurs when the ulnar nerve is compressed as it passes through the cubital tunnel. This can cause a range of symptoms, including tingling and numbness in the fourth and fifth fingers, which may start off intermittent but eventually become constant. Over time, patients may also experience weakness and muscle wasting. Pain is often worse when leaning on the affected elbow, and there may be a history of osteoarthritis or prior trauma to the area.
Diagnosis of cubital tunnel syndrome is usually made based on clinical features, although nerve conduction studies may be used in selected cases. Management of the condition typically involves avoiding aggravating activities, undergoing physiotherapy, and receiving steroid injections. In cases where these measures are not effective, surgery may be necessary. By understanding the symptoms and treatment options for cubital tunnel syndrome, patients can take steps to manage their condition and improve their quality of life.
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This question is part of the following fields:
- Musculoskeletal
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Question 41
Correct
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A 7-year-old girl is referred to the Paediatric Emergency Department by her General Practitioner with a 4-day history of fever.
On examination, the patient has bilateral conjunctival injection, a maculopapular rash across her trunk, and erythematous extremities. Her chest is clear and heart sounds are normal. The abdomen is soft and nontender. Her lips look cracked, and her tongue looks erythematous. She has no palpable lymphadenopathy.
Which of the following blood test results would support the likely diagnosis for this patient?
Your Answer: Thrombocytosis
Explanation:Understanding Kawasaki Disease: Diagnosis and Blood Test Results
Kawasaki disease is a clinical diagnosis that presents with a persistent fever and at least four of the following five criteria: bilateral conjunctival injection, polymorphous rash, oral changes, oedema and erythema in hands/feet, and cervical lymphadenopathy. Thrombocytosis is a common non-specific change seen in Kawasaki disease, and blood tests such as full blood count, urea and electrolytes, liver function, lipid profile, C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR) can support the diagnosis, assess severity, and monitor disease and treatment. Neutropenia is not usually associated with Kawasaki disease, and a raised white cell count with a relative neutrophilia is commonly seen. An elevated CRP with a normal ESR or an elevated ESR with a normal CRP would not be expected in Kawasaki disease, as both markers reflect acute inflammation. Kawasaki disease is associated with normocytic anaemia, but not macrocytic anaemia. It is important to arrange an echocardiogram as soon as possible to look for any initial evidence of coronary artery aneurysm, a common complication of Kawasaki disease.
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This question is part of the following fields:
- Musculoskeletal
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Question 42
Correct
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A 21-year-old soccer player comes to you with complaints of shoulder and lower back pain. He reports that his back has been getting stiffer over the past few months and has worsened. During the examination, you find out that he is also experiencing enthesitis of the Achilles tendon. You suspect a particular diagnosis and want to confirm it. What antigen's presence would confirm the diagnosis?
Your Answer: HLA-B27
Explanation:Ankylosing spondylitis is a type of spondyloarthropathy that is associated with HLA-B27. It is more commonly seen in young males, with a sex ratio of 3:1, and typically presents with lower back pain and stiffness that develops gradually. The stiffness is usually worse in the morning and improves with exercise, while pain at night may improve upon getting up. Clinical examination may reveal reduced lateral and forward flexion, as well as reduced chest expansion. Other features associated with ankylosing spondylitis include apical fibrosis, anterior uveitis, aortic regurgitation, Achilles tendonitis, AV node block, amyloidosis, cauda equina syndrome, and peripheral arthritis (more common in females).
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This question is part of the following fields:
- Musculoskeletal
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Question 43
Correct
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A 62-year-old woman comes to the Emergency Department with a worsening headache for one day. She noticed that the pain significantly worsened when she was brushing her hair. She also complains of pain in her jaw while talking.
Which of the following investigations is the gold standard test to confirm the suspected diagnosis of giant-cell arteritis (GCA) in this patient?Your Answer: Temporal artery biopsy
Explanation:Diagnostic Tests for Giant-Cell Arteritis
Giant-cell arteritis (GCA) is a medical emergency that requires prompt diagnosis and treatment to prevent irreversible vision loss. The gold-standard test for GCA is temporal artery biopsy, which should be performed as soon as the disease is suspected. However, treatment with corticosteroids should not be delayed until the biopsy results are available. Investigating antinuclear antibodies (ANA) is not useful, as they are usually negative in GCA. A CT scan of the brain is not typically performed for suspected GCA, but a CT angiography may be used to evaluate other large arteries. The erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) are commonly elevated in GCA and are part of the initial evaluation. A full blood count with peripheral smear may show normocytic normochromic anemia with or without thrombocytosis. Early recognition and appropriate management of GCA are crucial to prevent serious complications.
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This question is part of the following fields:
- Musculoskeletal
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Question 44
Correct
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A 62-year-old Hispanic man, who has a history of heavy alcohol consumption, complains of right knee pain. On examination, he has a limited range of movement at the knee joint and crepitus, and he is found to have a BMI of 30. A radiograph of the knee joint shows narrowing of the joint space and subchondral sclerosis.
Which of the following is the possible cause for these findings?
Your Answer: Obesity
Explanation:Risk Factors for Osteoarthritis: Identifying the Causes of Joint Pain
Osteoarthritis (OA) is a common condition that affects the joints, causing pain and stiffness. There are many risk factors associated with the development of OA, including obesity, family history, joint trauma, and overuse. In this scenario, the patient’s BMI of 32 indicates obesity, which is a known risk factor for OA.
Gender also plays a role in the development of OA, with women over the age of 55 being more commonly affected than men. Polyarticular OA is also more common in women.
Pyrophosphate arthropathy, which causes pseudogout, can also increase the risk of OA in affected joints. However, radiological evidence of chondrocalcinosis is necessary for a diagnosis of this condition.
While there is a variable distribution of OA across different ethnicities, no specific ethnic group is more at risk. Smoking has not been identified as a risk factor for OA.
Identifying these risk factors can help healthcare professionals diagnose and manage OA, improving the quality of life for those affected by this condition.
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This question is part of the following fields:
- Musculoskeletal
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Question 45
Correct
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As a general practice doctor, you are attending to a 55-year-old man who has come in as a same-day emergency with new pain in his right leg and foot. The pain has been present for the past 48 hours and is worse at night. He reports that the pain is in the outer side of his calf and the top of his foot and toes. The patient has a medical history of osteoarthritis, gout, and hypertension, and is currently taking paracetamol, amlodipine, naproxen, allopurinol, and omeprazole.
Upon examination, there is no tenderness or joint deformity in the ankle or foot. The patient has limited movement of the ankle and experiences pain when dorsiflexing his foot. There is slightly altered sensation over the dorsum of his foot, but sensation in the rest of his leg is normal. Bilateral palpable dorsalis pedis pulses are present.
What is the most likely cause of this man's leg pain?Your Answer: L5 radiculopathy
Explanation:Nerve root pain can be identified by its distribution along the lateral calf and dorsum of the foot, as well as the presence of a neurological deficit such as sensory changes and weakness. This suggests that the L5 nerve is affected.
In contrast, joint diseases like gout and osteoarthritis typically cause pain localized to the affected joint, without any specific distribution on the foot. There is also no associated sensory loss, and movement of the joint is limited in all directions, not just dorsiflexion.
Peripheral vascular disease or deep vein thrombosis can cause symptoms throughout the entire limb, without any discernible distribution. While arterial disease may cause calf pain, it does not lateralize to the medial or lateral side of the calf. Additionally, if the foot is affected, the pain and sensory changes will be present on both the dorsum and sole.
Understanding Prolapsed Disc and its Features
A prolapsed lumbar disc is a common cause of lower back pain that can lead to neurological deficits. It is characterized by clear dermatomal leg pain, which is usually worse than the back pain. The pain is often aggravated when sitting. The features of the prolapsed disc depend on the site of compression. For instance, L3 nerve root compression can cause sensory loss over the anterior thigh, weak quadriceps, reduced knee reflex, and a positive femoral stretch test. On the other hand, L4 nerve root compression can lead to sensory loss in the anterior aspect of the knee, weak quadriceps, reduced knee reflex, and a positive femoral stretch test.
The management of prolapsed disc is similar to that of other musculoskeletal lower back pain. It involves analgesia, physiotherapy, and exercises. According to NICE, the first-line treatment for back pain without sciatica symptoms is NSAIDs +/- proton pump inhibitors, rather than neuropathic analgesia. If the symptoms persist after 4-6 weeks, referral for consideration of MRI is appropriate. Understanding the features of prolapsed disc can help in the diagnosis and management of this condition.
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This question is part of the following fields:
- Musculoskeletal
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Question 46
Correct
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A 55-year-old diabetic right-handed woman complains of left shoulder discomfort. She reports a rigid shoulder that is frequently more painful at night and struggles with dressing or fastening her bra. Upon examination, there is no pinpoint tenderness, but you observe weakness in external rotation.
What could be the probable reason for her shoulder pain?Your Answer: Adhesive capsulitis
Explanation:Adhesive capsulitis typically results in a reduction of external rotation, both in active and passive movements.
Understanding Adhesive Capsulitis (Frozen Shoulder)
Adhesive capsulitis, commonly known as frozen shoulder, is a prevalent cause of shoulder pain that primarily affects middle-aged women. The exact cause of this condition is not yet fully understood. However, studies have shown that up to 20% of diabetics may experience an episode of frozen shoulder. Symptoms typically develop over several days, with external rotation being more affected than internal rotation or abduction. Both active and passive movement are affected, and patients usually experience a painful freezing phase, an adhesive phase, and a recovery phase. In some cases, the condition may affect both shoulders, which occurs in up to 20% of patients. The episode typically lasts between 6 months and 2 years.
Diagnosis of adhesive capsulitis is usually clinical, although imaging may be necessary for atypical or persistent symptoms. Unfortunately, no single intervention has been proven to improve the outcome in the long-term. However, there are several treatment options available, including nonsteroidal anti-inflammatory drugs (NSAIDs), physiotherapy, oral corticosteroids, and intra-articular corticosteroids.
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This question is part of the following fields:
- Musculoskeletal
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Question 47
Incorrect
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A patient in his late 60s with advanced prostate cancer and bone metastases receives intravenous zoledronic acid for pain and bone fractures. However, he presents to the emergency department three days later with muscle spasms, body aches, and tingling around his lips. Additionally, he reports worsening nausea and vomiting since the day after the infusion. What are the expected serum study results for this patient?
Your Answer: Hypercalcaemia
Correct Answer: Hypocalcaemia
Explanation:Before administering bisphosphonates, it is important to correct any hypocalcemia or vitamin D deficiency in the patient. This is especially important for patients with metastatic prostate cancer who may experience symptoms such as muscle spasms, tingling sensations, and nausea/vomiting, which are indicative of hypocalcemia. Bisphosphonates like zoledronic acid reduce bone turnover, which can further exacerbate the effects of calcium or vitamin D deficiency on serum calcium levels. Hypercalcemia, hyperkalemia, and hypernatremia are unlikely to occur as a result of bisphosphonate therapy and are therefore incorrect options.
Bisphosphonates: Uses and Adverse Effects
Bisphosphonates are drugs that mimic the action of pyrophosphate, a molecule that helps prevent bone demineralization. They work by inhibiting osteoclasts, which are cells that break down bone tissue. This reduces the risk of bone fractures and can be used to treat conditions such as osteoporosis, hypercalcemia, Paget’s disease, and pain from bone metastases.
However, bisphosphonates can have adverse effects, including oesophageal reactions such as oesophagitis and ulcers, osteonecrosis of the jaw, and an increased risk of atypical stress fractures of the proximal femoral shaft in patients taking alendronate. Patients may also experience an acute phase response, which can cause fever, myalgia, and arthralgia. Hypocalcemia, or low calcium levels, can also occur due to reduced calcium efflux from bone, but this is usually not clinically significant.
To minimize the risk of adverse effects, patients taking oral bisphosphonates should swallow the tablets whole with plenty of water while sitting or standing. They should take the medication on an empty stomach at least 30 minutes before breakfast or other oral medications and remain upright for at least 30 minutes after taking the tablet. Hypocalcemia and vitamin D deficiency should be corrected before starting bisphosphonate treatment, and calcium supplements should only be prescribed if dietary intake is inadequate. The duration of bisphosphonate treatment varies depending on the patient’s level of risk, and some authorities recommend stopping treatment after five years for low-risk patients with a femoral neck T-score of > -2.5.
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This question is part of the following fields:
- Musculoskeletal
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Question 48
Correct
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A 42-year-old woman is seen in the rheumatology clinic after being diagnosed with rheumatoid arthritis 6 months ago. She was initially started on methotrexate, however, was unable to tolerate its side effects. The consultant is considering starting the patient on hydroxychloroquine.
What should happen before the patient begins treatment?Your Answer: Examination by an ophthalmologist
Explanation:Patients who will be on long-term hydroxychloroquine treatment must now undergo an initial ophthalmologic examination. Recent studies indicate that hydroxychloroquine-induced retinopathy is more prevalent than previously believed. The latest guidelines from RCOphth (March 2018) recommend color retinal photography and spectral domain optical coherence tomography scanning of the macula for patients who are expected to take the medication for more than five years. While it is recommended to conduct a complete blood count and assess renal and liver function when starting hydroxychloroquine, other options are unnecessary.
Hydroxychloroquine: Uses and Adverse Effects
Hydroxychloroquine is a medication commonly used in the treatment of rheumatoid arthritis and systemic/discoid lupus erythematosus. It is similar to chloroquine, which is used to treat certain types of malaria. However, hydroxychloroquine has been found to cause bull’s eye retinopathy, which can result in severe and permanent visual loss. Recent data suggests that this adverse effect is more common than previously thought, and the most recent guidelines recommend baseline ophthalmological examination and annual screening, including colour retinal photography and spectral domain optical coherence tomography scanning of the macula. Despite this risk, hydroxychloroquine may still be used in pregnant women if needed. Patients taking this medication should be asked about visual symptoms and have their visual acuity monitored annually using a standard reading chart.
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This question is part of the following fields:
- Musculoskeletal
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Question 49
Correct
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A 48-year-old man suffers an Achilles tendon rupture while playing basketball. He has never had any medical issues related to his muscles or bones. He recently began taking antibiotics for an infection and has been on them for the past week. What type of antibiotic is he likely taking?
Your Answer: Ciprofloxacin
Explanation:New-onset Achilles tendon disorders, including tendinitis and tendon rupture, are likely caused by ciprofloxacin, a medication with important side effects to consider.
Achilles tendon disorders are a common cause of pain in the back of the heel. These disorders can include tendinopathy, partial tears, and complete ruptures of the Achilles tendon. Certain factors, such as the use of quinolone antibiotics and high cholesterol levels, can increase the risk of developing these disorders. Symptoms of Achilles tendinopathy typically include gradual onset of pain that worsens with activity, as well as morning stiffness. Treatment for this condition usually involves pain relief, reducing activities that exacerbate the pain, and performing calf muscle eccentric exercises.
In contrast, an Achilles tendon rupture is a more serious condition that requires immediate medical attention. This type of injury is often caused by sudden, forceful movements during sports or running. Symptoms of an Achilles tendon rupture include an audible popping sound, sudden and severe pain in the calf or ankle, and an inability to walk or continue the activity. To help diagnose an Achilles tendon rupture, doctors may use Simmond’s triad, which involves examining the foot for abnormal angles and feeling for a gap in the tendon. Ultrasound is typically the first imaging test used to confirm a diagnosis of Achilles tendon rupture. If a rupture is suspected, it is important to seek medical attention from an orthopaedic specialist as soon as possible.
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This question is part of the following fields:
- Musculoskeletal
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Question 50
Correct
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A 45-year-old woman presents to her General Practitioner with an acutely red and swollen left great toe, with no history of trauma. A diagnosis of gout is suspected.
Which of the following risk factors make it most likely that the patient will develop this condition?Your Answer: Alcohol excess
Explanation:Understanding the Risk Factors for Gout
Gout is a painful condition caused by hyperuricaemia, which can be influenced by various risk factors. While the cause of hyperuricaemia is multifactorial, certain factors have been identified as predisposing individuals to gout. These include high BMI, male gender, cardiovascular disease, renal disease, diabetes, and the use of certain drugs such as diuretics. Additionally, alcohol excess, particularly from spirits and beer, has been shown to increase the risk of gout. However, eczema and smoking are not recognized as risk factors for gout. Interestingly, gout is more common in men and rare in premenopausal women, and being overweight, rather than underweight, has been proposed as a risk factor for gout. Understanding these risk factors can help individuals take steps to prevent or manage gout.
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This question is part of the following fields:
- Musculoskeletal
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Question 51
Correct
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A 30-year-old woman attends a routine cervical smear test and is noted to have extensive scarring of her vulva. On further questioning, she reports several visits to the Sexual Health Clinic for recurrent episodes of painful vulval ulceration.
She has had several attendances at the dentist and General Practitioner with recurrent painful mouth ulcers. She has been referred to a dermatologist to investigate a painful nodular rash which developed on her shins several weeks ago but has since resolved. She was recently discharged from the Eye Clinic following treatment for an acutely painful red eye.
Which of the following is the most likely diagnosis?
Select ONE option only.Your Answer: Behçet’s disease
Explanation:Behçet’s disease is a rare autoimmune condition that causes painful recurrent mouth and genital ulcers leading to scarring. Diagnosis is often delayed due to the absence of a definitive diagnostic test. This patient has had a rash associated with Behçet’s disease and an episode of acute red eye, which may have been anterior uveitis, another symptom of the condition. Herpes simplex infection, Crohn’s disease, coeliac disease, and lichen planus are all conditions that can cause similar symptoms but can be ruled out based on the patient’s medical history and physical examination.
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This question is part of the following fields:
- Musculoskeletal
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Question 52
Correct
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A 48-year-old man presents to the clinic in the morning with a deformity in his right hand. He denies any tingling or numbness but mentions experiencing slight difficulty in using his hand, particularly when writing. The little and ring fingers appear to be slightly flexed, with no observable weakness. What could be the probable cause of his symptoms?
Your Answer: Dupuytren's contracture
Explanation:Dupuytren’s contracture is characterized by the thickening of the palmar aponeurosis, resulting in the inward bending of the medial digits. This can severely affect hand function, but does not involve any sensory issues, making nerve palsy unlikely. Ganglions typically appear as cystic swellings on the back of the hand, while trigger finger is associated with a digit catching or snapping during flexion.
Understanding Dupuytren’s Contracture
Dupuytren’s contracture is a condition that affects about 5% of the population. It is more common in older men and those with a family history of the condition. The causes of Dupuytren’s contracture include manual labor, phenytoin treatment, alcoholic liver disease, diabetes mellitus, and trauma to the hand.
The condition typically affects the ring finger and little finger, causing them to become bent and difficult to straighten. In severe cases, the hand may not be able to be placed flat on a table.
Surgical treatment may be necessary when the metacarpophalangeal joints cannot be straightened.
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This question is part of the following fields:
- Musculoskeletal
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Question 53
Correct
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A 12-year-old overweight boy attends surgery with his father. He complains of left knee pain for several weeks, worse when having to participate in sports at school. Examination reveals a normal left knee with good range of motion; left hip flexion causes obligatory external rotation.
Which of the following is the likely diagnosis?Your Answer: Slipped upper femoral epiphysis (SUFE)
Explanation:Slipped upper femoral epiphysis (SUFE) is a common hip disorder in adolescence that occurs when the proximal femoral growth plate weakens, causing displacement of the femoral epiphysis. This can be caused by various factors, with obesity being the most common risk factor. Patients often present with knee or groin pain, and the affected leg may be externally rotated with limited internal rotation and abduction. Chondromalacia patellae, Osgood-Schlatter disease, osteochondritis dissecans, and patellar subluxation are other possible causes of knee pain, but hip examination would be expected to be normal in these conditions. It is important to examine the hip joint in children presenting with knee pain, as it could be due to hip pathology such as SUFE.
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This question is part of the following fields:
- Musculoskeletal
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Question 54
Correct
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A 43-year-old man visits his GP complaining of a painful right shoulder. Despite being generally healthy and playing tennis regularly, he has been limited by the pain. Upon examination, his shoulders appear symmetrical with no skin changes, but he experiences mild tenderness over the right acromion. He can fully abduct his arm, but experiences pain approximately halfway through the motion, with the start and end of abduction being pain-free. There are no other symptoms or abnormalities in his upper limbs. What is the probable underlying pathology for this man's presentation?
Your Answer: Subacromial impingement
Explanation:Subacromial impingement is often characterized by a painful arc of abduction. This is likely the cause of the patient’s shoulder pain, which is accompanied by tenderness at the acromion and pain around the midpoint of abduction (typically between 60 to 120 degrees). These symptoms are not indicative of inflammatory arthritis affecting the acromioclavicular joint, which is rare. Osteoarthritis affecting the ACJ may cause tenderness and swelling, but not acromial tenderness or a painful arc in abduction. Cervical radiculopathy would cause neuropathic pain in the distribution of a cervical root, which is not consistent with the patient’s symptoms. Rheumatoid arthritis and other inflammatory arthropathies typically cause acute joint inflammation and effusion, which is not present in this case. A supraspinatus tear is a possible differential diagnosis, but the pain would be limited to the initial 60 degrees of abduction rather than the midpoint, indicating impingement as the more likely cause. Depending on the extent of the tear, abduction may also be limited due to difficulty initiating the movement.
Understanding Rotator Cuff Injuries
Rotator cuff injuries are a common cause of shoulder problems that can be classified into four types of disease: subacromial impingement, calcific tendonitis, rotator cuff tears, and rotator cuff arthropathy. The symptoms of a rotator cuff injury include shoulder pain that worsens during abduction.
The signs of a rotator cuff injury include a painful arc of abduction, which typically occurs between 60 and 120 degrees in cases of subacromial impingement. In cases of rotator cuff tears, the pain may be felt in the first 60 degrees of abduction. Additionally, tenderness over the anterior acromion may be present.
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This question is part of the following fields:
- Musculoskeletal
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Question 55
Incorrect
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A 35-year-old woman presents with a 3-day history of a painful and swollen right ankle. She is pyrexial with a temperature of 38.2 °C. Examination of her cardiovascular and respiratory systems is normal, and an abdominal examination is also normal. She mentions that she developed a painful left ear and saw another doctor 4 days ago, who told her that she had an infected ear and prescribed antibiotics. Her right ankle is swollen, red, tender and slightly flexed. A diagnosis of septic arthritis is made.
Which of the following is the most likely causative organism?
Select the SINGLE most likely causative organism.Your Answer: Escherichia coli (E. coli)
Correct Answer: Staphylococcus aureus (S. aureus)
Explanation:Common Bacterial Infections and their Causes
Septic arthritis is a joint infection caused by pyogenic organisms, with S. aureus being the most common culprit. Other organisms responsible include streptococci, Neisseria species, and Gram-negative bacilli. The infection typically spreads to the joint via the bloodstream or from adjacent osteomyelitis or trauma. Symptoms include pain, redness, warmth, and swelling in the affected joint. Diagnosis is established by aspirating and culturing the joint fluid. Immediate treatment with appropriate antibiotics is crucial to prevent cartilage destruction, and needle aspiration or surgical drainage may be necessary.
N. meningitidis is a Gram-negative bacterium that causes meningococcaemia and meningococcal meningitis, particularly in children and young adults. It is spread via respiratory secretions and can be carried asymptomatically by 5-10% of adults, with higher rates in close communities. The disease carries significant morbidity and mortality.
S. viridans is commonly found in the mouth and can cause endocarditis if introduced into the bloodstream. It is the most common cause of subacute bacterial endocarditis.
S. epidermidis is a Gram-positive staphylococcus that normally resides on human skin and mucosa. It commonly causes infections on catheters and implants, and is a frequent cause of nosocomial infections, particularly in TPN and bone marrow transplant patients.
E. coli is commonly found in the large intestine and is a major cause of urinary tract infections, cholecystitis and cholangitis, and neonatal meningitis.
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This question is part of the following fields:
- Musculoskeletal
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Question 56
Correct
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A 68-year-old female with a history of osteoporosis is prescribed alendronate. What is the most crucial side-effect to caution her about?
Your Answer: Heartburn
Explanation:Patients starting bisphosphonates should be warned about potential oesophageal problems, particularly with alendronate. Any new symptoms following the introduction of this drug should be reviewed by a medical professional.
Bisphosphonates: Uses and Adverse Effects
Bisphosphonates are drugs that mimic the action of pyrophosphate, a molecule that helps prevent bone demineralization. They work by inhibiting osteoclasts, which are cells that break down bone tissue. This reduces the risk of bone fractures and can be used to treat conditions such as osteoporosis, hypercalcemia, Paget’s disease, and pain from bone metastases.
However, bisphosphonates can have adverse effects, including oesophageal reactions such as oesophagitis and ulcers, osteonecrosis of the jaw, and an increased risk of atypical stress fractures of the proximal femoral shaft in patients taking alendronate. Patients may also experience an acute phase response, which can cause fever, myalgia, and arthralgia. Hypocalcemia, or low calcium levels, can also occur due to reduced calcium efflux from bone, but this is usually not clinically significant.
To minimize the risk of adverse effects, patients taking oral bisphosphonates should swallow the tablets whole with plenty of water while sitting or standing. They should take the medication on an empty stomach at least 30 minutes before breakfast or other oral medications and remain upright for at least 30 minutes after taking the tablet. Hypocalcemia and vitamin D deficiency should be corrected before starting bisphosphonate treatment, and calcium supplements should only be prescribed if dietary intake is inadequate. The duration of bisphosphonate treatment varies depending on the patient’s level of risk, and some authorities recommend stopping treatment after five years for low-risk patients with a femoral neck T-score of > -2.5.
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This question is part of the following fields:
- Musculoskeletal
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Question 57
Correct
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A 35-year-old male presents with inner elbow and forearm pain that started after building a bookcase at home three days ago. He has no regular medication and is generally healthy. During the examination, you notice tenderness in the medial elbow joint and the patient reports discomfort when resisting wrist pronation. What is the probable diagnosis?
Your Answer: Golfer's elbow
Explanation:Epicondylitis results from repetitive stress that leads to inflammation of the common extensor tendon located at the epicondyle. Medial epicondylitis, also known as golfer’s elbow, causes tenderness at the medial epicondyle and results in wrist pain on resisted pronation. Lateral epicondylitis, or tennis elbow, causes tenderness at the lateral epicondyle and results in elbow pain on resisted extension of the wrist.
Common Causes of Elbow Pain
Elbow pain can be caused by a variety of conditions, each with their own characteristic features. Lateral epicondylitis, also known as tennis elbow, is characterized by pain and tenderness localized to the lateral epicondyle. Pain is worsened by resisted wrist extension with the elbow extended or supination of the forearm with the elbow extended. Episodes typically last between 6 months and 2 years, with acute pain lasting for 6-12 weeks.
Medial epicondylitis, or golfer’s elbow, is characterized by pain and tenderness localized to the medial epicondyle. Pain is aggravated by wrist flexion and pronation, and symptoms may be accompanied by numbness or tingling in the 4th and 5th finger due to ulnar nerve involvement.
Radial tunnel syndrome is most commonly due to compression of the posterior interosseous branch of the radial nerve, and is thought to be a result of overuse. Symptoms are similar to lateral epicondylitis, but the pain tends to be around 4-5 cm distal to the lateral epicondyle. Symptoms may be worsened by extending the elbow and pronating the forearm.
Cubital tunnel syndrome is due to the compression of the ulnar nerve. Initially, patients may experience intermittent tingling in the 4th and 5th finger, which may be worse when the elbow is resting on a firm surface or flexed for extended periods. Later, numbness in the 4th and 5th finger with associated weakness may occur.
Olecranon bursitis is characterized by swelling over the posterior aspect of the elbow, with associated pain, warmth, and erythema. It typically affects middle-aged male patients. Understanding the characteristic features of these conditions can aid in their diagnosis and treatment.
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This question is part of the following fields:
- Musculoskeletal
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Question 58
Correct
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A 68-year-old man comes to your clinic accompanied by his daughter. He reports having painless swelling in his fingers that has been persistent. When inquiring about his medical history, he denies any issues except for a nagging cough. During the examination of his hands, you observe an increased curvature of the nails and a loss of the angle between the nail and nail bed. Considering the potential diagnoses, what would be the most crucial step to take?
Your Answer: Urgent chest X-ray
Explanation:According to NICE guidelines for suspected lung cancers, individuals over the age of 40 with finger clubbing should undergo a chest X-ray. Given that this patient is 70 years old and has a persistent cough and finger clubbing, an urgent chest X-ray is necessary to investigate the possibility of lung cancer or mesothelioma. Pain relief medication such as oral analgesia or ibuprofen gel is not necessary as the patient is not experiencing any pain, which would be indicative of osteoarthritis. Reassurance is not appropriate in this case as finger clubbing in individuals over the age of 40 requires immediate investigation.
Referral Guidelines for Lung Cancer
Lung cancer is a serious condition that requires prompt diagnosis and treatment. The 2015 NICE cancer referral guidelines provide clear advice on when to refer patients for further assessment. According to these guidelines, patients should be referred using a suspected cancer pathway referral if they have chest x-ray findings that suggest lung cancer or if they are aged 40 and over with unexplained haemoptysis.
For patients aged 40 and over who have two or more unexplained symptoms, or who have ever smoked and have one or more unexplained symptoms, an urgent chest x-ray should be offered within two weeks to assess for lung cancer. These symptoms include cough, fatigue, shortness of breath, chest pain, weight loss, and appetite loss.
In addition, an urgent chest x-ray should be considered within two weeks for patients aged 40 and over who have persistent or recurrent chest infection, finger clubbing, supraclavicular lymphadenopathy or persistent cervical lymphadenopathy, chest signs consistent with lung cancer, or thrombocytosis.
Overall, these guidelines provide clear and specific criteria for when to refer patients for further assessment for lung cancer. By following these guidelines, healthcare professionals can ensure that patients receive timely and appropriate care.
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This question is part of the following fields:
- Musculoskeletal
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Question 59
Correct
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A 67-year-old woman complains of long-standing issues with her hands, but lately, she has been experiencing pain in the joints of her fingers and difficulty opening jars. She has also observed a lump on the dorsal, distal part of her left index finger. What is the most probable diagnosis?
Your Answer: Herberden's node
Explanation:Nodal osteoarthritis is the usual cause of osteoarthritis in the hands, resulting from genetic factors. This type of arthritis leads to the development of Heberden’s nodes, which is swelling in the distal interphalangeal joints, and Bouchard’s nodes, which is swelling in the proximal interphalangeal joints. These nodes do not require any treatment. Pyogenic granuloma is a lesion that appears as a bright red or blood-crusted area, often following trauma, and is more common in children. A ganglion is a cystic lesion that occurs in the joint or synovial sheath of a tendon, most commonly in the wrist. A sebaceous cyst is a mobile, round cyst with a central punctum.
Clinical Diagnosis of Osteoarthritis
Osteoarthritis can be diagnosed clinically without the need for investigations, according to NICE guidelines. This means that a doctor can diagnose the condition based on the patient’s symptoms and physical examination alone. The guidelines state that if a patient is over 45 years old and experiences pain during exercise, but does not have morning stiffness or morning stiffness lasting more than 30 minutes, they can be diagnosed with osteoarthritis.
This approach to diagnosis is based on the fact that osteoarthritis is a degenerative condition that affects the joints, causing pain and stiffness. The symptoms tend to develop gradually over time, and are often worse after periods of inactivity or overuse. By focusing on the patient’s symptoms and history, doctors can make an accurate diagnosis and start treatment as soon as possible.
Overall, the clinical diagnosis of osteoarthritis is a simple and effective way to identify the condition in patients who meet the criteria. It allows for prompt treatment and management of symptoms, which can improve the patient’s quality of life and prevent further joint damage.
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This question is part of the following fields:
- Musculoskeletal
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Question 60
Correct
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A highly active 12-year-old boy who plays football for his local team reports knee pain for several months. Upon examination, tenderness is noted over the tibial tuberosity.
What is the most probable diagnosis?Your Answer: Osgood-Schlatter disease
Explanation:Common Causes of Knee Pain in Young Patients
Knee pain is a common complaint among young patients, especially those who are active in sports. Here are some of the most common causes of knee pain in this population:
1. Osgood-Schlatter disease: This condition is caused by overuse of quadriceps, putting strain on the patellar ligament attachment to the tibia, which is not yet fully developed. The key clinical examination finding is tenderness over the tibial tuberosity, and there may well be a bony lump over the area as well.
2. Patellar subluxation: This describes the temporary but recurring lateral subluxation of the patella. Patients may describe the knee ‘giving way’ or feeling it move out of place, most commonly during activity such as running or jumping.
3. Chondromalacia patellae: This is caused by abnormal softening of the cartilage on the underside of the patella. Patients will describe anterior knee pain, which is worse after sitting for a prolonged length of time, or for activities including walking down the stairs, jumping, running or climbing.
4. Osteoarthritis: This is a disease of older age, owing to degeneration of the articular cartilage. It is often seen in the weight-bearing areas, including the knee and hip, as well as in the hands.
5. Osteochondritis dissecans: This is caused by separation of subchondral bone articular cartilage from the joint surface, and affects the knee in 75% of cases. It tends to present in teenagers and young adults, with a vague and achy joint pain that is made worse by activity, and may be accompanied by swelling.
It is important to note that knee pain in children could also be due to hip pathology, such as SUFE (slipped upper femoral epiphysis). Proper diagnosis and management are crucial for the long-term health of the joint.
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This question is part of the following fields:
- Musculoskeletal
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Question 61
Correct
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A 26-year-old construction worker visits his GP complaining of elbow swelling that has been present for three weeks. He reports that it started gradually and has no known triggers. The area is painful and warm to the touch, but he has no swelling in other parts of his body and feels generally well. The patient has a history of well-managed rheumatoid arthritis and is taking methotrexate, but has no other medical conditions. During the examination, the doctor detects a tender, soft, fluctuant mass on the back of the patient's elbow. Based on these findings, what is the most probable diagnosis?
Your Answer: Olecranon bursitis
Explanation:Understanding Olecranon Bursitis
Olecranon bursitis is a condition that occurs when the olecranon bursa, a fluid-filled sac located over the olecranon process at the proximal end of the ulna, becomes inflamed. This bursa serves to reduce friction between the elbow joint and the surrounding soft tissues. Inflammation can be caused by trauma, infection, or systemic conditions such as rheumatoid arthritis or gout. It is also commonly known as student’s elbow due to the repetitive mild trauma of leaning on a desk using the elbows. The condition can be categorized as septic or non-septic depending on whether an infection is present.
The condition is more common in men and typically presents between the ages of 30 and 60. Causes of olecranon bursitis include repetitive trauma, direct trauma, infection, gout, rheumatoid arthritis, and idiopathic reasons. Patients with non-septic olecranon bursitis typically present with swelling over the olecranon process, while some may also experience tenderness and erythema over the bursa. Patients with septic bursitis are more likely to have pain and fever.
Signs of olecranon bursitis include swelling over the posterior aspect of the elbow, tenderness on palpation of the swollen area, redness and warmth of the overlying skin, fever, skin abrasion overlying the bursa, effusions in other joints if associated with rheumatoid arthritis, and tophi if associated with gout. Movement at the elbow joint should be painless until the swollen bursa is compressed in full flexion.
Investigations are not always needed if a clinical diagnosis can be made and there is no concern about septic arthritis. However, if septic bursitis is suspected, aspiration of bursal fluid for microscopy and culture is essential. Purulent fluid suggests infection, while straw-colored bursal fluid favors a non-infective cause.
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This question is part of the following fields:
- Musculoskeletal
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Question 62
Correct
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You assess a 23-year-old man who has recently been released from the local hospital after having a pneumothorax drained. This is his second admission in two years for the same issue. Upon examination today, his chest is clear with good air entry in all fields. However, you observe that he has pectus excavatum. He is 1.83m tall and weighs 72 kg. The only other relevant medical history is joint hypermobility, for which he was referred to a physiotherapist last year. What is the most probable underlying diagnosis?
Your Answer: Marfan's syndrome
Explanation:The presence of recurrent pneumothoraces and joint hypermobility suggests the possibility of Marfan’s syndrome.
Understanding Marfan’s Syndrome
Marfan’s syndrome is a genetic disorder that affects the connective tissue in the body. It is caused by a defect in the FBN1 gene on chromosome 15, which codes for the protein fibrillin-1. This disorder is inherited in an autosomal dominant pattern, meaning that a person only needs to inherit one copy of the defective gene from one parent to develop the condition. Marfan’s syndrome affects approximately 1 in 3,000 people.
The features of Marfan’s syndrome include a tall stature with an arm span to height ratio greater than 1.05, a high-arched palate, arachnodactyly (long, slender fingers), pectus excavatum (sunken chest), pes planus (flat feet), and scoliosis (curvature of the spine). In addition, individuals with Marfan’s syndrome may experience cardiovascular problems such as dilation of the aortic sinuses, mitral valve prolapse, and aortic aneurysm. They may also have lung issues such as repeated pneumothoraces. Eye problems are also common, including upwards lens dislocation, blue sclera, and myopia. Finally, dural ectasia, or ballooning of the dural sac at the lumbosacral level, may also occur.
In the past, the life expectancy of individuals with Marfan’s syndrome was around 40-50 years. However, with regular echocardiography monitoring and the use of beta-blockers and ACE inhibitors, this has improved significantly in recent years. Despite these improvements, aortic dissection and other cardiovascular problems remain the leading cause of death in individuals with Marfan’s syndrome.
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This question is part of the following fields:
- Musculoskeletal
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Question 63
Incorrect
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As a foundation year two doctor in the emergency department, you are tasked to assess a twenty-six-year-old man who fell on his right ankle while intoxicated last night. According to the patient, he was able to bear weight after the incident and continued his night out. However, he woke up the next day with ankle swelling and pain. Upon examination, you observed minimal swelling and bruising, but there is general tenderness and good mobility. What imaging modality would you recommend for this case?
Your Answer: X-ray ankle in department
Correct Answer: No imaging
Explanation:The Ottowa ankle rules specify that imaging is necessary after trauma if there is point tenderness over the distal 6 cm of the lateral or medial malleolus, or an inability to bear weight by at least four steps immediately after the injury and in the emergency department. X-ray is the recommended first-line imaging. As this patient does not exhibit any of these indications, an x-ray is not needed.
Ottawa Rules for Ankle Injuries
The Ottawa Rules provide a guideline for determining whether an ankle x-ray is necessary after an injury. These rules have a sensitivity approaching 100%, meaning they are highly accurate. An ankle x-ray is only required if there is pain in the malleolar zone and one of the following findings: bony tenderness at the lateral malleolar zone or medial malleolar zone, or inability to walk four weight-bearing steps immediately after the injury and in the emergency department.
The lateral malleolar zone is from the tip of the lateral malleolus to include the lower 6 cm of the posterior border of the fibular, while the medial malleolar zone is from the tip of the medial malleolus to the lower 6 cm of the posterior border of the tibia. These rules help healthcare professionals determine whether an ankle x-ray is necessary, which can save time and resources. It is important to note that there are also Ottawa rules available for foot and knee injuries. By following these guidelines, healthcare professionals can provide efficient and effective care for ankle injuries.
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This question is part of the following fields:
- Musculoskeletal
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Question 64
Incorrect
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A 28-year-old woman visits her GP complaining of joint pain. She has previously sought medical attention for this issue, but her high BMI of 30 kg/m² was deemed to be the cause and weight loss was recommended. Upon examination, the doctor notes a significant effusion in her left knee and limited range of motion. The metacarpophalangeal joints in her right hand appear swollen and her fingers have a sausage-like appearance. Her left hand does not show any obvious deformities. The patient has tested positive for HLA-B27 and has a blood pressure of 138/87 mmHg and a temperature of 36.7ºC. Based on this information, what is the most probable diagnosis?
Your Answer: Septic arthritis
Correct Answer: Psoriatic arthritis
Explanation:Psoriatic arthritis is a type of arthritis that can occur without prior psoriatic skin lesions and is often associated with dactylitis, also known as ‘sausage fingers’. HLA-B27 is commonly found in patients with psoriatic arthritis. Gout is unlikely in a woman under 60 and typically affects the big toe joint. Rheumatoid arthritis is also unlikely as it causes symmetrical polyarthritis and is associated with HLA-DRB1 rather than HLA-B27. Therefore, given the patient’s age, sex, dactylitis, and nail changes, psoriatic arthritis is a more likely diagnosis.
Psoriatic arthropathy is a type of inflammatory arthritis that is associated with psoriasis. It is classified as one of the seronegative spondyloarthropathies and is known to have a poor correlation with cutaneous psoriasis. In fact, it often precedes the development of skin lesions. This condition affects both males and females equally, with around 10-20% of patients with skin lesions developing an arthropathy.
The presentation of psoriatic arthropathy can vary, with different patterns of joint involvement. The most common type is symmetric polyarthritis, which is very similar to rheumatoid arthritis and affects around 30-40% of cases. Asymmetrical oligoarthritis is another type, which typically affects the hands and feet and accounts for 20-30% of cases. Sacroiliitis, DIP joint disease, and arthritis mutilans (severe deformity of fingers/hand) are other patterns of joint involvement. Other signs of psoriatic arthropathy include psoriatic skin lesions, periarticular disease, enthesitis, tenosynovitis, dactylitis, and nail changes.
To diagnose psoriatic arthropathy, X-rays are often used. These can reveal erosive changes and new bone formation, as well as periostitis and a pencil-in-cup appearance. Management of this condition should be done by a rheumatologist, and treatment is similar to that of rheumatoid arthritis. However, there are some differences, such as the use of monoclonal antibodies like ustekinumab and secukinumab. Mild peripheral arthritis or mild axial disease may be treated with NSAIDs alone, rather than all patients being on disease-modifying therapy as with RA. Overall, psoriatic arthropathy has a better prognosis than RA.
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This question is part of the following fields:
- Musculoskeletal
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Question 65
Correct
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A 65-year-old female patient visits the GP clinic with complaints of pain behind her right eye and pain across her right forehead and scalp whenever she brushes her hair. She also mentions experiencing increased difficulty while eating.
What is the probable diagnosis?Your Answer: Temporal arteritis
Explanation:Temporal arteritis should be considered in an older patient experiencing a sudden onset of unilateral headache accompanied by jaw claudication and elevated ESR. Trigeminal neuralgia typically does not cause jaw stiffness, while acute angle-closure glaucoma presents with a red eye and does not involve jaw claudication. Although TMJ dysfunction can cause pain during chewing and extend to the scalp and headache, there is no additional information to suggest this as the cause. Therefore, temporal arteritis is the more probable diagnosis.
Understanding Temporal Arteritis
Temporal arteritis is a type of large vessel vasculitis that often overlaps with polymyalgia rheumatica (PMR). It is characterized by changes in the affected artery that skip certain sections while damaging others. This condition typically affects individuals who are over 60 years old and has a rapid onset, usually occurring in less than a month. The most common symptoms include headache and jaw claudication, while vision testing is a crucial investigation for all patients.
Temporal arteritis can lead to various ocular complications, with anterior ischemic optic neuropathy being the most common. This results from the occlusion of the posterior ciliary artery, leading to ischemia of the optic nerve head. Patients may experience temporary visual loss or even permanent visual loss, which is the most feared complication of this condition. Other symptoms may include diplopia, tender and palpable temporal artery, and features of PMR such as aching, morning stiffness in proximal limb muscles, lethargy, depression, low-grade fever, anorexia, and night sweats.
To diagnose temporal arteritis, doctors may look for raised inflammatory markers such as an ESR of over 50 mm/hr or elevated CRP levels. A temporal artery biopsy may also be performed to check for skip lesions. Urgent high-dose glucocorticoids should be given as soon as the diagnosis is suspected, and an ophthalmologist should review patients with visual symptoms on the same day. Treatment may also involve bone protection with bisphosphonates and low-dose aspirin, although the evidence supporting the latter is weak.
In summary, temporal arteritis is a serious condition that requires prompt diagnosis and treatment to prevent irreversible visual damage. Patients who experience symptoms such as headache, jaw claudication, and visual disturbances should seek medical attention immediately.
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This question is part of the following fields:
- Musculoskeletal
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Question 66
Incorrect
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The hand radiograph of a 43-year-old woman demonstrates periarticular osteoporosis, loss of joint space and bone erosions.
Which of the following is the most likely diagnosis?
Your Answer: Hypercalcaemia
Correct Answer: Rheumatoid arthritis (RA)
Explanation:Radiographic Features of Common Rheumatologic Conditions
Rheumatoid arthritis (RA) is characterized by periarticular osteoporosis, narrowing of joint space, juxta-articular bony erosions, subluxation, gross deformity, and periarticular soft tissue swelling. In the hands, swan neck deformity of fingers, ulnar deviation of the metacarpophalangeal (MCP) joints, boutonnière deformity of the thumb, and Bouchard’s nodes are common. However, the presence of Bouchard’s nodes without Heberden’s nodes is more indicative of RA than osteoarthritis.
Gout may present with gouty tophi, which are soft tissue masses created by the deposition of urate crystals. Punched-out erosions caused by bone absorption may also be present. These changes tend to be sporadic and asymmetrical.
Osteoarthritis is characterized by subchondral bone cysts, osteophytes, narrowing of joint space, and subchondral sclerosis. Clinically, both Heberden’s and Bouchard’s nodes may be present.
Psoriatic arthritis most commonly affects the hands and feet. Radiographic features include erosions along the shaft of the phalanges, leading to ‘pencil-in-cup’ deformity and tufting of the bones. Unlike RA, osteoporosis is not a feature, and typically the more distal joints are affected.
Hypercalcaemia does not have specific radiographic features. The changes seen would be those associated with the underlying cause of the hypercalcaemia, such as hyperparathyroidism or cancer.
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This question is part of the following fields:
- Musculoskeletal
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Question 67
Incorrect
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A 15-year-old student presents with low back pain that radiates to the back of their legs. They have an elevated ESR and negative serum rheumatoid factor. A spine radiograph reveals anterior squaring of the vertebrae.
What is the most probable diagnosis?Your Answer: Lumbar disc prolapse with sciatica
Correct Answer: Ankylosing spondylitis (AS)
Explanation:Ankylosing spondylitis (AS) is a type of arthritis that is characterized by morning stiffness lasting more than 30 minutes, improvement of back pain with exercise but not rest, awakening due to back pain during the second half of the night, and alternating buttock pain. It is a seronegative spondyloarthropathy, meaning that the rheumatoid factor will be negative. Radiographically, sacroiliitis is often the first abnormality seen. ESR and CRP are usually raised, and HLA-B27 testing may provide supporting evidence. Lumbar disc prolapse with sciatica, rheumatoid arthritis, spinal stenosis, and Paget’s disease of bone are other conditions that may cause similar symptoms but have different characteristics and diagnostic criteria.
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This question is part of the following fields:
- Musculoskeletal
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Question 68
Incorrect
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A 35-year-old footballer presents with persistent pain in his left knee that began abruptly during a game. During the physical examination, you instruct the patient to lie down and flex his knee. As you internally rotate his foot, he experiences discomfort and you detect a clicking sensation. The patient inquires about the procedure, and you clarify that you are performing McMurray's test, a specialized examination for knee joint issues. What is the probable reason for his knee pain?
Your Answer: Anterior cruciate ligament tear
Correct Answer: Meniscal tear
Explanation:A positive McMurray test is indicative of a meniscal tear, which is typically caused by twisting of the knee. During the test, the knee is flexed while the sole of the foot is held, and one hand is placed on the medial side of the knee to pull it towards a varus position. The other hand is used to internally rotate the leg while extending the knee. If the patient experiences pain or a clicking sensation, the test is considered positive. On the other hand, a positive draw test is a sign of an anterior cruciate ligament tear, which is also commonly caused by twisting of the knee.
Knee problems are common among older adults, and it is important to be aware of the key features of each condition. Osteoarthritis of the knee is often seen in patients over 50 years of age who are overweight. This condition can cause severe pain, intermittent swelling, crepitus, and limited movement. Infrapatellar bursitis, also known as Clergyman’s knee, is associated with kneeling, while prepatellar bursitis, or Housemaid’s knee, is associated with more upright kneeling. Anterior cruciate ligament injuries may be caused by twisting of the knee, and patients may have heard a popping noise. Rapid onset of knee effusion and a positive draw test are also common features. Posterior cruciate ligament injuries may be caused by anterior force applied to the proximal tibia, such as during a car accident. Collateral ligament injuries can cause tenderness over the affected ligament and knee effusion. Meniscal lesions may be caused by twisting of the knee and can cause locking and giving-way, as well as tenderness along the joint line.
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This question is part of the following fields:
- Musculoskeletal
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Question 69
Incorrect
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A 38-year-old woman with systemic lupus erythematosus presents to her General Practitioner with concerns about her current medication. She is currently taking azathioprine 130 mg/day, in divided doses. Yesterday she took a home pregnancy test which was positive.
What is the best course of management for her medication?Your Answer: Stop azathioprine
Correct Answer: Continue azathioprine
Explanation:Managing Treatment for Pregnant Patients with Autoimmune Diseases
When treating pregnant patients with autoimmune diseases, it is important to consider the potential risks and benefits of different medications. In the case of a patient already on an established dose of azathioprine, it is generally recommended to continue this medication during pregnancy, as stopping or reducing the dose could put the patient at risk of disease progression. Methotrexate should never be used during pregnancy due to its teratogenic effects. High-dose corticosteroids may also pose risks to the developing fetus if used for prolonged periods. Stopping all treatment could trigger disease worsening, so it is important to carefully weigh the risks and benefits of any changes to medication. In some cases, infliximab may be necessary during pregnancy, but this should be carefully considered and discussed with a specialist. Overall, managing treatment for pregnant patients with autoimmune diseases requires careful consideration of the potential risks and benefits of different medications.
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This question is part of the following fields:
- Musculoskeletal
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Question 70
Incorrect
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A 68-year-old diabetic man presents with a stiff and painful left shoulder that limits all movements. He is left-handed and can no longer participate in his favorite hobbies due to the discomfort. Adhesive capsulitis is suspected. What factors are linked to this condition?
Your Answer: Male gender
Correct Answer: History of diabetes mellitus
Explanation:Adhesive capsulitis is a condition that may occur in diabetic patients, as well as those with a history of myocardial infarction, lung disease, or neck disease. It is more common in females aged 40-60 years, and typically affects the non-dominant hand. Prolonged immobilization or disuse of the arm due to pain from another cause may also lead to adhesive capsulitis. There is no known correlation with activity.
Understanding Adhesive Capsulitis (Frozen Shoulder)
Adhesive capsulitis, commonly known as frozen shoulder, is a prevalent cause of shoulder pain that primarily affects middle-aged women. The exact cause of this condition is not yet fully understood. However, studies have shown that up to 20% of diabetics may experience an episode of frozen shoulder. Symptoms typically develop over several days, with external rotation being more affected than internal rotation or abduction. Both active and passive movement are affected, and patients usually experience a painful freezing phase, an adhesive phase, and a recovery phase. In some cases, the condition may affect both shoulders, which occurs in up to 20% of patients. The episode typically lasts between 6 months and 2 years.
Diagnosis of adhesive capsulitis is usually clinical, although imaging may be necessary for atypical or persistent symptoms. Unfortunately, no single intervention has been proven to improve the outcome in the long-term. However, there are several treatment options available, including nonsteroidal anti-inflammatory drugs (NSAIDs), physiotherapy, oral corticosteroids, and intra-articular corticosteroids.
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This question is part of the following fields:
- Musculoskeletal
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Question 71
Incorrect
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A 32-year-old woman arrives at the Emergency Department complaining of feeling unwell for the past 2 days. She reports weakness in her legs and increasing shortness of breath. The patient has a history of rheumatoid arthritis and hypothyroidism and is currently taking methotrexate and levothyroxine. She recently received treatment for a urinary tract infection from her GP. The patient's blood results are as follows: Hb 108 g/L (female normal range: 115-160 g/L), platelets 97 * 109/L (normal range: 150-400 * 109/L), WBC 1.9 * 109/L (normal range: 4.0-11.0 * 109/L), Na+ 139 mmol/L (normal range: 135-145 mmol/L), K+ 4.1 mmol/L (normal range: 3.5-5.0 mmol/L), urea 5.9 mmol/L (normal range: 2.0-7.0 mmol/L), and creatinine 87 µmol/L (normal range: 55-120 µmol/L). What is the most likely cause of the patient's symptoms?
Your Answer: Levothyroxine
Correct Answer: Trimethoprim
Explanation:If methotrexate and trimethoprim-containing antibiotics are used together, it may lead to severe or fatal pancytopenia and bone marrow suppression. This patient, who takes methotrexate for rheumatoid arthritis, has presented with pancytopenia and feeling unwell. Myelosuppression is a known adverse effect of methotrexate, which can be exacerbated by renal impairment and certain medications.
Methotrexate: An Antimetabolite with Potentially Life-Threatening Side Effects
Methotrexate is an antimetabolite drug that inhibits the enzyme dihydrofolate reductase, which is essential for the synthesis of purines and pyrimidines. It is commonly used to treat inflammatory arthritis, psoriasis, and some types of leukemia. However, it is considered an important drug due to its potential for life-threatening side effects. Careful prescribing and close monitoring are essential to ensure patient safety.
The adverse effects of methotrexate include mucositis, myelosuppression, pneumonitis, pulmonary fibrosis, and liver fibrosis. The most common pulmonary manifestation is pneumonitis, which typically develops within a year of starting treatment and presents with non-productive cough, dyspnea, malaise, and fever. Women should avoid pregnancy for at least 6 months after treatment has stopped, and men using methotrexate need to use effective contraception for at least 6 months after treatment.
When prescribing methotrexate, it is important to follow guidelines and monitor patients regularly. Methotrexate is taken weekly, and FBC, U&E, and LFTs need to be regularly monitored. The starting dose is 7.5 mg weekly, and folic acid 5mg once weekly should be co-prescribed, taken more than 24 hours after the methotrexate dose. Only one strength of methotrexate tablet should be prescribed, usually 2.5 mg. It is also important to avoid prescribing trimethoprim or co-trimoxazole concurrently, as it increases the risk of marrow aplasia, and high-dose aspirin increases the risk of methotrexate toxicity.
In case of methotrexate toxicity, the treatment of choice is folinic acid. Methotrexate is a drug with a high potential for patient harm, and it is crucial to be familiar with guidelines relating to its use to ensure patient safety.
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This question is part of the following fields:
- Musculoskeletal
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Question 72
Incorrect
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A woman in her early 50s with a history of rheumatoid arthritis presents with right foot drop and numbness in her right hand, with thenar eminence wasting and sensory loss over the radial half of her hand.
Which of the following is the most likely cause for her symptoms?
Select the SINGLE most appropriate cause from the list below.Your Answer: Entrapment neuropathy
Correct Answer: Mononeuritis multiplex
Explanation:Neuropathies: Causes and Symptoms
Neuropathies are a group of disorders that affect the peripheral nervous system. Here are some common causes and symptoms of different types of neuropathies:
Mononeuritis Multiplex:
This neuropathy affects two or more non-anatomically related peripheral nerves. It is caused by vasculopathy of the vasa nervorum or infiltration of the nerves. Common causes include diabetes mellitus, leprosy, polyarteritis nodosa, and rheumatoid arthritis. Symptoms include multiple concurrent peripheral nerve lesions without pain or paraesthesiae.Peripheral Sensory Neuropathy:
This neuropathy is most commonly caused by diabetes mellitus (types 1 and 2) in the United Kingdom. It affects the sensory nerves and does not involve motor functions. Symptoms include aching pain, paraesthesiae, sensory loss, and muscle wasting.Entrapment Neuropathy:
This neuropathy is caused by compression of peripheral nerves due to hypertrophied synovium or joint subluxation. It usually affects only one part of the body. The most common nerve compressions are cubital tunnel and carpal tunnel syndromes. Symptoms include aching pain, paraesthesiae, sensory loss, and muscle wasting.Myasthenia Gravis (MG):
This autoimmune disorder affects the neuromuscular junction and causes fatigability of the muscle. It commonly affects the extraocular, bulbar, face, and neck muscles. Symptoms do not include pain or sensory loss, and wasting is only seen very late in the disease.Multiple Sclerosis:
This autoimmune disorder affects the central nervous system and causes spasticity, ataxia, and paraesthesiae in the affected limbs. It commonly affects the optic nerve, causing optic neuritis. Peripheral nerve involvement is not seen. -
This question is part of the following fields:
- Musculoskeletal
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Question 73
Correct
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A 60-year-old white man, who is a chronic smoker, presents with low back and hip pain. His serum alkaline phosphatase level is 1000 iu/l (39–117 iu/l), calcium 2.25 mmol/l (2.2–2.67 mmol/l) and phosphate 1.2 mmol/l (0.8–1.5 mmol/l). Other liver function tests (LFTs) are normal. He also complains of difficulty in hearing.
Which of the following is the most likely diagnosis?
Your Answer: Paget’s disease of bone
Explanation:Bone Disorders and Blood Biochemistry: Understanding the Differences
Bone disorders can be difficult to diagnose, as many of them share similar symptoms. However, blood biochemistry can often provide clues to help differentiate between them. Here, we will discuss several common bone disorders and their associated blood biochemistry.
Paget’s Disease of Bone
Paget’s disease of bone is a disorder of bone remodeling that typically affects patients over the age of 40. Symptoms include bone and joint pain, deformities, nerve compression, and pathological fractures. Blood biochemistry typically shows raised serum alkaline phosphatase, with normal calcium and phosphate levels. Bisphosphonates are the mainstay of treatment.
Squamous Cell Carcinoma of the Lung
Squamous cell carcinoma of the lung is the second most common form of lung cancer and is strongly linked to smoking. Symptoms include cough, wheeze, and haemoptysis. Squamous cell carcinomas can cause hypercalcaemia as part of the paraneoplastic syndrome, but normal calcium levels and lack of respiratory symptoms may rule out this diagnosis.
Multiple Myeloma
Multiple myeloma is a malignant disease of plasma cells of the bone marrow. Normal calcium levels and the mention of hearing loss may rule out this diagnosis.
Osteomalacia
Osteomalacia is a disease of inadequate bone mineralization, most commonly caused by vitamin D deficiency. Symptoms include bony pain, muscle tenderness and weakness, pathological fractures, and proximal myopathy. Blood biochemistry may reveal hypocalcaemia and raised alkaline phosphatase.
Osteoporosis
Osteoporosis is caused by decreased bone density and tends to present initially with a fragility fracture. Blood biochemistry would be normal in a patient with osteoporosis.
In summary, understanding the differences in blood biochemistry can help differentiate between common bone disorders. This knowledge can aid in accurate diagnosis and appropriate treatment.
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This question is part of the following fields:
- Musculoskeletal
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Question 74
Incorrect
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A 26-year-old man is being examined for persistent back pain. What symptom would strongly indicate a diagnosis of ankylosing spondylitis?
Your Answer: Pain on straight leg raising
Correct Answer: Reduced lateral flexion of the lumbar spine
Explanation:Ankylosing spondylitis is characterized by an early reduction in lateral flexion of the lumbar spine. Patients with this condition often experience a decrease in lumbar lordosis and an increase in thoracic kyphosis.
Ankylosing spondylitis is a type of spondyloarthropathy that is associated with HLA-B27. It is more commonly seen in young males, with a sex ratio of 3:1, and typically presents with lower back pain and stiffness that develops gradually. The stiffness is usually worse in the morning and improves with exercise, while pain at night may improve upon getting up. Clinical examination may reveal reduced lateral and forward flexion, as well as reduced chest expansion. Other features associated with ankylosing spondylitis include apical fibrosis, anterior uveitis, aortic regurgitation, Achilles tendonitis, AV node block, amyloidosis, cauda equina syndrome, and peripheral arthritis (more common in females).
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This question is part of the following fields:
- Musculoskeletal
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Question 75
Correct
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A 75-year-old woman who has undergone a total hip replacement (THR) comes for evaluation because of discomfort on the side of her prosthesis. What is the primary cause for a revision surgery in a patient who has had a THR?
Your Answer: Aseptic loosening of the implant
Explanation:The primary cause for the revision of total hip replacements is aseptic loosening, followed by pain and dislocation.
Osteoarthritis (OA) of the hip is a prevalent condition, with the knee being the only joint more commonly affected. It is particularly prevalent in older individuals, and women are twice as likely to develop it. Obesity and developmental dysplasia of the hip are also risk factors. The condition is characterized by chronic groin pain that is exacerbated by exercise and relieved by rest. However, if the pain is present at rest, at night, or in the morning for more than two hours, it may indicate an alternative cause. The Oxford Hip Score is a widely used tool to assess the severity of the condition.
If the symptoms are typical, a clinical diagnosis can be made. Otherwise, plain x-rays are the first-line investigation. Management of OA of the hip includes oral analgesia and intra-articular injections, which provide short-term relief. However, total hip replacement is the definitive treatment.
Total hip replacement is a common operation in the developed world, but it is not without risks. Perioperative complications include venous thromboembolism, intraoperative fracture, nerve injury, surgical site infection, and leg length discrepancy. Postoperatively, posterior dislocation may occur during extremes of hip flexion, presenting with a clunk, pain, and inability to weight bear. Aseptic loosening is the most common reason for revision, and prosthetic joint infection is also a potential complication.
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This question is part of the following fields:
- Musculoskeletal
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Question 76
Incorrect
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A 75-year-old patient presents to you with a query about discontinuing her alendronic acid medication. She has been taking it for six years since she suffered a distal radial fracture after tripping over an uneven kerb. She has not experienced any other fractures before or after this incident. Her DEXA scan six years ago revealed a T-score of -2.4. The patient has no significant medical history and has not had any recent falls. She is a non-smoker. What would be the appropriate course of action to discuss with the patient?
Your Answer: Continue bisphosphonate given history of fragility fracture
Correct Answer: Repeat DEXA scan and FRAX score now and stop the bisphosphonate if low risk, T score is now >-2.5, and review in two years
Explanation:The topic of bisphosphonate holidays has gained attention due to recent evidence from the National Osteoporosis Guideline Group (NOGG) in January 2016. The guidance recommends that after a five-year period of taking oral bisphosphonates (or three years for IV zoledronate), patients should undergo a re-assessment of their treatment. This includes an updated FRAX score and DEXA scan to determine if ongoing treatment is necessary.
Patients are divided into high and low-risk groups based on certain criteria. To be considered high-risk, patients must meet one of the following criteria: age over 75, receiving glucocorticoid therapy, previous hip/vertebral fractures, further fractures while on treatment, high-risk FRAX score, or a T score of less than -2.5 after treatment. If any of these criteria apply, treatment should be continued indefinitely or until the criteria no longer apply.
For patients in the low-risk group, treatment may be discontinued and re-assessed after two years or if a further fracture occurs. In the case of a patient without high-risk factors, a recent DEXA scan should be conducted to determine if a two-year break from treatment is appropriate, provided their T score is greater than -2.5.
Bisphosphonates: Uses and Adverse Effects
Bisphosphonates are drugs that mimic the action of pyrophosphate, a molecule that helps prevent bone demineralization. They work by inhibiting osteoclasts, which are cells that break down bone tissue. This reduces the risk of bone fractures and can be used to treat conditions such as osteoporosis, hypercalcemia, Paget’s disease, and pain from bone metastases.
However, bisphosphonates can have adverse effects, including oesophageal reactions such as oesophagitis and ulcers, osteonecrosis of the jaw, and an increased risk of atypical stress fractures of the proximal femoral shaft in patients taking alendronate. Patients may also experience an acute phase response, which can cause fever, myalgia, and arthralgia. Hypocalcemia, or low calcium levels, can also occur due to reduced calcium efflux from bone, but this is usually not clinically significant.
To minimize the risk of adverse effects, patients taking oral bisphosphonates should swallow the tablets whole with plenty of water while sitting or standing. They should take the medication on an empty stomach at least 30 minutes before breakfast or other oral medications and remain upright for at least 30 minutes after taking the tablet. Hypocalcemia and vitamin D deficiency should be corrected before starting bisphosphonate treatment, and calcium supplements should only be prescribed if dietary intake is inadequate. The duration of bisphosphonate treatment varies depending on the patient’s level of risk, and some authorities recommend stopping treatment after five years for low-risk patients with a femoral neck T-score of > -2.5.
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This question is part of the following fields:
- Musculoskeletal
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Question 77
Correct
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A 56-year-old woman visits her GP complaining of pain and limited movement in her left shoulder joint for the past 4 weeks. She denies any history of injury and reports feeling generally healthy. Her medical history includes hypertension and hypothyroidism. During the examination, the patient experiences pain with all active and passive movements of the left shoulder, and there is significant restriction in external rotation. What is the probable diagnosis?
Your Answer: Adhesive capsulitis
Explanation:The impairment of external rotation, both on active and passive movement, is a classic feature of adhesive capsulitis. This condition is the most likely diagnosis, as the patient’s symptoms of restricted active and passive external rotation have only been present for the last 4 weeks. Osteoarthritis, on the other hand, tends to present with a more chronic pain history. Adhesive capsulitis is often associated with endocrine conditions such as diabetes and thyroid disease, and has three distinct phases: painful, stiff, and recovery. Physiotherapy is the mainstay of treatment, but early intra-articular steroid injection may be considered if conservative measures are not effective. Biceps tendonitis typically presents with anterior shoulder pain and point tenderness over the biceps tendon on examination. Inflammatory arthritis is unlikely as there are no other joint involvements, morning stiffness, or systemic symptoms, and the history and examination are consistent with adhesive capsulitis. While osteoarthritis may be considered in the differential diagnosis, the duration of symptoms and classic examination findings suggest adhesive capsulitis as the most likely diagnosis.
Understanding Adhesive Capsulitis (Frozen Shoulder)
Adhesive capsulitis, commonly known as frozen shoulder, is a prevalent cause of shoulder pain that primarily affects middle-aged women. The exact cause of this condition is not yet fully understood. However, studies have shown that up to 20% of diabetics may experience an episode of frozen shoulder. Symptoms typically develop over several days, with external rotation being more affected than internal rotation or abduction. Both active and passive movement are affected, and patients usually experience a painful freezing phase, an adhesive phase, and a recovery phase. In some cases, the condition may affect both shoulders, which occurs in up to 20% of patients. The episode typically lasts between 6 months and 2 years.
Diagnosis of adhesive capsulitis is usually clinical, although imaging may be necessary for atypical or persistent symptoms. Unfortunately, no single intervention has been proven to improve the outcome in the long-term. However, there are several treatment options available, including nonsteroidal anti-inflammatory drugs (NSAIDs), physiotherapy, oral corticosteroids, and intra-articular corticosteroids.
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This question is part of the following fields:
- Musculoskeletal
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Question 78
Incorrect
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A 70-year-old man complains of back pain that occurs during walking. Upon obtaining a thorough medical history and conducting a neurological and vascular assessment, the possibility of spinal stenosis is considered. Following the prescription of pain relief medication, what is the most suitable course of action?
Your Answer: Lumbar spine x-ray
Correct Answer: Refer for MRI
Explanation:To confirm the diagnosis and rule out other potential causes, an MRI is necessary for this presentation.
Lower back pain is a common issue that is often caused by muscular strain. However, it is important to be aware of potential underlying causes that may require specific treatment. Certain red flags should be considered, such as age under 20 or over 50, a history of cancer, night pain, trauma, or systemic illness. There are also specific causes of lower back pain that should be kept in mind. Facet joint pain may be acute or chronic, worse in the morning and on standing, and typically worsens with back extension. Spinal stenosis may cause leg pain, numbness, and weakness that is worse on walking and relieved by sitting or leaning forward. Ankylosing spondylitis is more common in young men and causes stiffness that is worse in the morning and improves with activity. Peripheral arterial disease may cause pain on walking and weak foot pulses. It is important to consider these potential causes and seek appropriate diagnosis and treatment.
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This question is part of the following fields:
- Musculoskeletal
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Question 79
Incorrect
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A high school student complains of painful mouth ulcers associated with pain and swelling in both hands. She has had several episodes of vasospasm in her fingers, with pallor, cyanosis and subsequent redness caused by reactive hyperaemia. Blood tests reveal anti-double-stranded (ds)DNA antibodies and antinuclear antibodies (ANAs).
Which of the following is the most likely diagnosis?
Your Answer: Sjögren syndrome
Correct Answer: Systemic lupus erythematosus (SLE)
Explanation:Autoimmune Connective Tissue Diseases: Characteristics and Differences
Systemic lupus erythematosus (SLE), Sjögren syndrome, Behçet’s disease, granulomatosis with polyangiitis, and systemic sclerosis are all autoimmune connective tissue diseases with distinct characteristics. SLE is most prevalent in African-American women and presents with arthralgia, rashes, and fever. Sjögren syndrome is characterised by dry eyes and mouth, while Behçet’s disease is primarily characterised by recurrent mouth ulcers, genital ulceration, eye lesions, and cutaneous manifestations. Granulomatosis with polyangiitis predominantly affects the small vessels and presents with lesions involving the upper respiratory tract, lungs, and kidneys. Systemic sclerosis is a multisystem disease characterised by Raynaud’s phenomenon and either limited or diffuse cutaneous scleroderma. Understanding the differences between these diseases is crucial for accurate diagnosis and treatment.
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This question is part of the following fields:
- Musculoskeletal
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Question 80
Incorrect
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A 32-year-old woman is brought to the Emergency Department by ambulance having ingested 12 g of paracetamol over the past three hours. She weighs 70 kg. Her observations are within normal limits and she feels well.
Which of the following is the most appropriate management option?Your Answer: Take bloods including a coagulation screen and start acetylcysteine if clotting is deranged
Correct Answer: Give intravenous acetylcysteine immediately
Explanation:Treatment and Management of Paracetamol Overdose
Paracetamol overdose is a serious medical emergency that requires prompt treatment and management. Here are some important steps to take:
Give intravenous acetylcysteine immediately for patients who have taken a staggered overdose, which is defined as ingesting a potentially toxic dose of paracetamol over a period of over one hour. Patients who have taken a dose of paracetamol > 150 mg/kg are at risk of serious toxicity.
Observe the patient for 24 hours after treatment.
Measure serum paracetamol level and give acetylcysteine if the level is above the treatment line. Patients who have ingested > 75 mg/kg of paracetamol over a period of less than one hour should have their serum paracetamol levels measured four hours after ingestion. If this level is above the treatment line, they should be treated with intravenous acetylcysteine. If blood tests reveal an alanine aminotransferase above the upper limit of normal, patients should be started on acetylcysteine regardless of serum paracetamol levels.
Start haemodialysis if patients have an exceedingly high serum paracetamol concentration (> 700 mg/l) associated with an elevated blood lactate and coma.
Take bloods including a coagulation screen and start acetylcysteine if clotting is deranged. In patients where a serum paracetamol level is indicated (patients who have ingested > 75 mg/kg of paracetamol over a period of less than one hour), deranged liver function tests are an indication to start acetylcysteine regardless of serum paracetamol levels.
In summary, prompt treatment with intravenous acetylcysteine is crucial for patients who have taken a staggered overdose of paracetamol. Monitoring of serum paracetamol levels, liver function tests, and clotting factors can help guide further management. Haemodialysis may be necessary in severe cases.
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This question is part of the following fields:
- Musculoskeletal
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Question 81
Incorrect
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A 32-year-old woman presents with back pain that shoots down her right leg, which she experienced suddenly while picking up her child. During examination, she can only raise her right leg to 30 degrees due to shooting pains down her leg. There is reduced sensation on the dorsum of her right foot, especially around the big toe, and weak foot dorsiflexion. The ankle and knee reflexes seem intact, and a diagnosis of disc prolapse is suspected. Which nerve root is most likely affected?
Your Answer: L4
Correct Answer: L5
Explanation:The characteristics of a L5 lesion include the absence of dorsiflexion in the foot and a lack of sensation on the top of the foot.
Understanding Prolapsed Disc and its Features
A prolapsed lumbar disc is a common cause of lower back pain that can lead to neurological deficits. It is characterized by clear dermatomal leg pain, which is usually worse than the back pain. The pain is often aggravated when sitting. The features of the prolapsed disc depend on the site of compression. For instance, L3 nerve root compression can cause sensory loss over the anterior thigh, weak quadriceps, reduced knee reflex, and a positive femoral stretch test. On the other hand, L4 nerve root compression can lead to sensory loss in the anterior aspect of the knee, weak quadriceps, reduced knee reflex, and a positive femoral stretch test.
The management of prolapsed disc is similar to that of other musculoskeletal lower back pain. It involves analgesia, physiotherapy, and exercises. According to NICE, the first-line treatment for back pain without sciatica symptoms is NSAIDs +/- proton pump inhibitors, rather than neuropathic analgesia. If the symptoms persist after 4-6 weeks, referral for consideration of MRI is appropriate. Understanding the features of prolapsed disc can help in the diagnosis and management of this condition.
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This question is part of the following fields:
- Musculoskeletal
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Question 82
Incorrect
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A 25-year-old female complains of ankle pain after twisting it during a game of basketball. What is the least significant factor to consider when determining if an x-ray is necessary?
Your Answer: Tenderness at the medial malleolar zone
Correct Answer: Swelling immediately after the injury and now
Explanation:Ottawa Rules for Ankle Injuries
The Ottawa Rules provide a guideline for determining whether an ankle x-ray is necessary after an injury. These rules have a sensitivity approaching 100%, meaning they are highly accurate. An ankle x-ray is only required if there is pain in the malleolar zone and one of the following findings: bony tenderness at the lateral malleolar zone or medial malleolar zone, or inability to walk four weight-bearing steps immediately after the injury and in the emergency department.
The lateral malleolar zone is from the tip of the lateral malleolus to include the lower 6 cm of the posterior border of the fibular, while the medial malleolar zone is from the tip of the medial malleolus to the lower 6 cm of the posterior border of the tibia. These rules help healthcare professionals determine whether an ankle x-ray is necessary, which can save time and resources. It is important to note that there are also Ottawa rules available for foot and knee injuries. By following these guidelines, healthcare professionals can provide efficient and effective care for ankle injuries.
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This question is part of the following fields:
- Musculoskeletal
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Question 83
Incorrect
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A 75-year-old male is brought to the emergency department after slipping on ice. He has a painful left leg that appears shortened and externally rotated. There are no visible skin breaks and no peripheral neurovascular compromise. An x-ray reveals a stable, complete, intertrochanteric proximal femur fracture. The patient has no medical history and takes no regular medications. He is given pain relief and referred to the orthopaedic team. What is the recommended procedure for his condition?
Your Answer: Conservative management
Correct Answer: Dynamic hip screw
Explanation:The optimal surgical management for an extracapsular proximal femoral fracture is a dynamic hip screw. This is the recommended approach for patients who are fit and have no comorbidities that would prevent them from undergoing surgery. Conservative management is not appropriate as it would lead to a reduced quality of life and is only considered for patients who cannot undergo surgery.
Intramedullary nails with external fixation are used for lower extremity long bone fractures, such as femur or tibia fractures. This involves inserting a nail into the bone alongside external fixation screws that are attached to a device outside the skin to provide additional support and realign the bone if necessary. External fixation is temporary and will be removed once the bone has healed sufficiently.
Hemiarthroplasty, which involves replacing the femoral head and neck, is typically used for displaced fractures and is less complicated than a total hip replacement (THR). It is suitable for less active patients who want to return to normal activities of daily living. However, THR is becoming more popular for active patients with displaced femoral neck fractures and pre-existing hip osteoarthritis. As this patient does not have a displaced fracture, THR is not necessary.
Hip fractures are a common occurrence, particularly in elderly women with osteoporosis. The femoral head’s blood supply runs up the neck, making avascular necrosis a potential risk in displaced fractures. Symptoms of a hip fracture include pain and a shortened and externally rotated leg. Patients with non-displaced or incomplete neck of femur fractures may still be able to bear weight. Hip fractures can be classified as intracapsular or extracapsular, with the Garden system being a commonly used classification system. Blood supply disruption is most common in Types III and IV fractures.
Intracapsular hip fractures can be treated with internal fixation or hemiarthroplasty if the patient is unfit. Displaced fractures are recommended for replacement arthroplasty, such as total hip replacement or hemiarthroplasty, according to NICE guidelines. Total hip replacement is preferred over hemiarthroplasty if the patient was able to walk independently outdoors with the use of a stick, is not cognitively impaired, and is medically fit for anesthesia and the procedure. Extracapsular hip fractures can be managed with a dynamic hip screw for stable intertrochanteric fractures or an intramedullary device for reverse oblique, transverse, or subtrochanteric fractures.
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This question is part of the following fields:
- Musculoskeletal
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Question 84
Incorrect
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As a foundation year two doctor in general practice, you encounter a thirty-four-year-old priest who reports knee pain without any history of trauma. Upon examination, you note stable observations and slight swelling with pain and tenderness overlying the knee. What is the probable diagnosis?
Your Answer: Ruptured bursa
Correct Answer: Infrapatellar bursitis
Explanation:The most probable diagnosis for this gentleman’s condition is infrapatellar bursitis, which is often associated with kneeling, particularly in clergymen. Although prepatellar bursitis may also be a possible cause, it is more commonly observed in housemaids who kneel in a more upright position. Osteoarthritis, which is characterized by knee pain and a feeling of instability, is more prevalent in individuals over the age of forty-five, making it less likely for this patient. Cruciate ligament damage, meniscal tear, and ruptured bursa are also potential causes, but they are typically associated with a history of trauma.
Knee problems are common among older adults, and it is important to be aware of the key features of each condition. Osteoarthritis of the knee is often seen in patients over 50 years of age who are overweight. This condition can cause severe pain, intermittent swelling, crepitus, and limited movement. Infrapatellar bursitis, also known as Clergyman’s knee, is associated with kneeling, while prepatellar bursitis, or Housemaid’s knee, is associated with more upright kneeling. Anterior cruciate ligament injuries may be caused by twisting of the knee, and patients may have heard a popping noise. Rapid onset of knee effusion and a positive draw test are also common features. Posterior cruciate ligament injuries may be caused by anterior force applied to the proximal tibia, such as during a car accident. Collateral ligament injuries can cause tenderness over the affected ligament and knee effusion. Meniscal lesions may be caused by twisting of the knee and can cause locking and giving-way, as well as tenderness along the joint line.
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This question is part of the following fields:
- Musculoskeletal
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Question 85
Correct
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A 50-year-old right-handed male gardener presents with elbow pain. He reports a gradual onset of pain in his left elbow over a period of four weeks with only mild relief from over-the-counter pain medication. The patient enjoys playing tennis and does yard work regularly. He does recall a fall at home four weeks ago where he landed on his right elbow. The patient denies any fever and feels generally well. During the examination, the patient experiences tenderness over the left elbow with resisted wrist extension/supination and the elbow held in extension. There is no significant swelling over the olecranon. What is the most probable cause of this man's elbow pain?
Your Answer: Lateral epicondylitis
Explanation:The most probable diagnosis for this patient is lateral epicondylitis, which is characterized by pain around the lateral epicondyle of the humerus that radiates to the forearm. The pain is exacerbated by repetitive movements with the dominant hand, which is common in the patient’s job as a cleaner. The pain is worsened by resisted wrist extension and supination while the elbow is extended. Medial epicondylitis, olecranon bursitis, radial head fractures, and septic arthritis are less likely differentials as they do not match the examination findings in this scenario.
Understanding Lateral Epicondylitis
Lateral epicondylitis, commonly known as tennis elbow, is a condition that often occurs after engaging in activities that the body is not accustomed to, such as painting or playing tennis. It is most prevalent in individuals aged 45-55 years and typically affects the dominant arm. The primary symptom of this condition is pain and tenderness localized to the lateral epicondyle. The pain is often exacerbated by wrist extension against resistance with the elbow extended or supination of the forearm with the elbow extended. Episodes of lateral epicondylitis can last between 6 months and 2 years, with patients experiencing acute pain for 6-12 weeks.
To manage lateral epicondylitis, it is essential to avoid muscle overload and engage in simple analgesia. Steroid injections and physiotherapy are also viable options for managing the condition. By understanding the symptoms and management options for lateral epicondylitis, individuals can take the necessary steps to alleviate pain and discomfort associated with this condition.
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This question is part of the following fields:
- Musculoskeletal
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Question 86
Correct
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A 49-year-old man comes to the GP complaining of pain in his right elbow. He reports that the pain began last week after he painted the walls of his house. During the examination, it is observed that the pain intensifies when he resists wrist extension and supinates his forearm while the elbow is extended. What is the probable diagnosis?
Your Answer: Lateral epicondylitis
Explanation:The most likely cause of elbow pain in this individual is lateral epicondylitis, which is commonly known as ‘tennis’ elbow. It is aggravated by wrist extension and supination of the forearm, although other activities can also trigger it. Cubital tunnel syndrome is not the correct answer as it presents with ulnar nerve compression and paraesthesia in the ulnar nerve distribution, which is exacerbated when the elbow is flexed for extended periods of time. Medial epicondylitis, also known as ‘golfer’s’ elbow, is not the correct answer either as the pain is aggravated by wrist flexion and pronation, and there are no other associated features. Olecranon bursitis is also not the correct answer as it presents with a swelling over the olecranon, and may also have associated pain, warmth, and erythema, and typically affects middle-aged male patients.
Understanding Lateral Epicondylitis
Lateral epicondylitis, commonly known as tennis elbow, is a condition that often occurs after engaging in activities that the body is not accustomed to, such as painting or playing tennis. It is most prevalent in individuals aged 45-55 years and typically affects the dominant arm. The primary symptom of this condition is pain and tenderness localized to the lateral epicondyle. The pain is often exacerbated by wrist extension against resistance with the elbow extended or supination of the forearm with the elbow extended. Episodes of lateral epicondylitis can last between 6 months and 2 years, with patients experiencing acute pain for 6-12 weeks.
To manage lateral epicondylitis, it is essential to avoid muscle overload and engage in simple analgesia. Steroid injections and physiotherapy are also viable options for managing the condition. By understanding the symptoms and management options for lateral epicondylitis, individuals can take the necessary steps to alleviate pain and discomfort associated with this condition.
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This question is part of the following fields:
- Musculoskeletal
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Question 87
Incorrect
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A 62-year-old man presents with several months of right knee pain. A radiograph confirms mild osteoarthritis. What is the best initial treatment option?
Your Answer: Oral ibuprofen
Correct Answer: Topical ibuprofen
Explanation:Treatment Options for Osteoarthritis: A Guide to Medications and Lifestyle Changes
When it comes to managing osteoarthritis (OA), there are a variety of treatment options available. However, not all treatments are created equal. According to NICE guidelines, the first-line treatment for OA to hands and knees is with a topical non-steroidal anti-inflammatory drug (NSAID) or oral paracetamol. Oral NSAIDs are considered the second-line treatment choice, to be used only after inadequate response to oral paracetamol or topical NSAIDs.
It’s important to note that nutraceuticals, including oral glucosamine and chondroitin, should not be offered for OA management. Instead, other treatment options initially include weight loss and exercise encouragement.
If medication is necessary, topical ibuprofen and paracetamol should be considered first line, ahead of oral NSAIDs or opioids. Oral NSAIDs, such as diclofenac with omeprazole, ibuprofen, and naproxen, are second line and should be given at the lowest effective dose for the shortest duration possible. Proton pump inhibitor (PPI) cover may be indicated for oral NSAIDs.
In summary, managing OA requires a multifaceted approach that includes lifestyle changes and medication when necessary. By following NICE guidelines and working closely with a healthcare provider, individuals with OA can find relief and improve their quality of life.
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This question is part of the following fields:
- Musculoskeletal
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Question 88
Incorrect
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A 25-year-old student with ankylosing spondylitis (AS) has increasing back pain and early morning stiffness.
Which of the following treatments would you recommend?Your Answer: Laminectomy and spinal fusion
Correct Answer: Oral NSAIDs
Explanation:Non-steroidal anti-inflammatory drugs (NSAIDs) are the primary treatment for relieving symptoms of ankylosing spondylitis (AS). It is recommended to co-prescribe a proton pump inhibitor to protect the stomach. If one NSAID is ineffective, switching to another may be helpful. Slow-release NSAIDs may be beneficial for morning stiffness and pain. Colchicine is not recommended for AS due to severe side-effects. Paracetamol and codeine have no direct evidence for treating AS symptoms, but may be used in conjunction with NSAIDs if appropriate. Surgery may be necessary in cases of structural damage, severe deformity, spinal instability, or neurological deficit. Oral corticosteroids should be avoided due to long-term side-effects, but intra-articular injections may provide relief during acute flares. Tumor necrosis factor-alpha (TNF-α)-blocking drugs are effective in reducing symptoms and inflammation in those with persistent, active inflammation. Rituximab has no role in treating seronegative arthritis.
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This question is part of the following fields:
- Musculoskeletal
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Question 89
Incorrect
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A 32-year-old intravenous drug user presents to the emergency department with fever, bilateral leg weakness, and back pain. The medical team suspects a spinal epidural abscess. What imaging test is necessary to confirm the diagnosis?
Your Answer: Plain x-rays of the whole spine
Correct Answer: MRI whole spine
Explanation:When there is suspicion of a spinal epidural abscess, a complete MRI of the spine is necessary to detect any skip lesions.
To accurately diagnose a spinal epidural abscess, a full spine MRI is essential. Neither plain x-rays nor CT scans can effectively identify the abscess. It is necessary to scan the entire spine, not just the suspected area, as there may be multiple separate abscesses that are not connected. The MRI should be requested and performed as soon as possible.
Understanding Spinal Epidural Abscess
A spinal epidural abscess (SEA) is a serious condition that occurs when pus collects in the spinal epidural space, which is the area surrounding the spinal cord. This condition requires immediate medical attention to prevent further damage to the spinal cord. SEA can be caused by bacteria that enters the spinal epidural space through contiguous spread from adjacent structures, haematogenous spread from concomitant infection, or direct infection. Patients with immunosuppression are at a higher risk of developing SEA. The most common causative micro-organism is Staphylococcus aureus. Symptoms of SEA include fever, back pain, and focal neurological deficits according to the segment of the cord affected.
To diagnose SEA, doctors may perform blood tests, blood cultures, and an infection screen. An MRI of the whole spine is necessary to identify the extent of the abscess. If the primary source of infection is not clear, further investigations may be required, such as echocardiography and dental x-rays. Treatment for SEA involves a long-term course of antibiotics, which may be refined based on culture results. Patients with large or compressive abscesses, significant or progressive neurological deficits, or those who are not responding to antibiotics alone may require surgical evacuation of the abscess.
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This question is part of the following fields:
- Musculoskeletal
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Question 90
Incorrect
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A 30-year-old man comes to the clinic with complaints of painful urination and left knee pain. He had experienced a severe episode of diarrhea three weeks ago. What is the probable diagnosis?
Your Answer: Behcet's syndrome
Correct Answer: Reactive arthritis
Explanation:Reactive arthritis is characterized by the presence of urethritis, arthritis, and conjunctivitis, and this patient exhibits two of these classic symptoms.
Understanding Reactive Arthritis: Symptoms and Features
Reactive arthritis is a type of seronegative spondyloarthropathy that is associated with HLA-B27. It was previously known as Reiter’s syndrome, which was characterized by a triad of urethritis, conjunctivitis, and arthritis following a dysenteric illness during World War II. However, later studies revealed that patients could also develop symptoms after a sexually transmitted infection, now referred to as sexually acquired reactive arthritis (SARA).
Reactive arthritis is defined as an arthritis that develops after an infection, but the organism cannot be recovered from the joint. The symptoms typically develop within four weeks of the initial infection and last for around 4-6 months. Approximately 25% of patients experience recurrent episodes, while 10% develop chronic disease. The arthritis is usually an asymmetrical oligoarthritis of the lower limbs, and patients may also experience dactylitis.
Other symptoms of reactive arthritis include urethritis, conjunctivitis (seen in 10-30% of patients), and anterior uveitis. Skin symptoms may also occur, such as circinate balanitis (painless vesicles on the coronal margin of the prepuce) and keratoderma blenorrhagica (waxy yellow/brown papules on palms and soles). A helpful mnemonic to remember the symptoms of reactive arthritis is Can’t see, pee, or climb a tree.
In conclusion, understanding the symptoms and features of reactive arthritis is crucial for early diagnosis and treatment. While the condition can be recurrent or chronic, prompt management can help alleviate symptoms and improve quality of life for affected individuals.
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This question is part of the following fields:
- Musculoskeletal
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Question 91
Correct
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A 65-year-old female presents to her GP with a 4-week history of bilateral shoulder pain. She also experiences stiffness in her shoulders in the morning which improves throughout the day. She reports feeling generally fatigued. No other joints are affected. The patient has a history of osteoarthritis in her left knee.
During examination, the patient's observations are normal. There is no swelling or redness in the shoulders, and she has a full range of motion bilaterally. Upper limb power is 5/5 bilaterally with normal sensation.
Based on the patient's history and examination, what is the most likely diagnosis?Your Answer: Polymyalgia rheumatica
Explanation:The patient’s symptoms are suggestive of polymyalgia rheumatica (PMR), which is a common inflammatory condition in older adults. The sudden onset of pain and stiffness in the shoulders and hips, along with systemic symptoms such as fatigue and anorexia, are typical of PMR. Osteoarthritis, fibromyalgia, hypothyroidism, and adhesive capsulitis are less likely diagnoses, as they do not typically present with acute onset of symptoms or systemic involvement. However, it is important to rule out hypothyroidism by checking thyroid function. Frozen shoulder may cause shoulder pain and stiffness, but it is usually associated with restricted range of motion and does not typically cause systemic symptoms.
Polymyalgia Rheumatica: A Condition of Muscle Stiffness in Older People
Polymyalgia rheumatica (PMR) is a common condition that affects older people. It is characterized by muscle stiffness and elevated inflammatory markers. Although it is closely related to temporal arteritis, the underlying cause is not fully understood, and it does not appear to be a vasculitic process. PMR typically affects patients over the age of 60 and has a rapid onset, usually within a month. Patients experience aching and morning stiffness in proximal limb muscles, along with mild polyarthralgia, lethargy, depression, low-grade fever, anorexia, and night sweats.
To diagnose PMR, doctors look for raised inflammatory markers, such as an ESR of over 40 mm/hr. Creatine kinase and EMG are normal. Treatment for PMR involves prednisolone, usually at a dose of 15mg/od. Patients typically respond dramatically to steroids, and failure to do so should prompt consideration of an alternative diagnosis.
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This question is part of the following fields:
- Musculoskeletal
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Question 92
Incorrect
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A 79-year-old male patient has a home visit from his general practitioner for follow-up after sustaining fractured neck of femur slipping on ice. He reports to feel well in himself and is progressing with the rehabilitation programme advised to him at discharge and is not reliant on analgesia any longer. He had no previous medical or surgical history prior to the fall. The patient would like some advice regarding preventing future fractures.
Which, of the options below, is appropriate?Your Answer: Refer for DEXA scan prior to any prescription
Correct Answer: Prescription of alendronate
Explanation:In patients aged 75 years or older who have experienced a fragility fracture, alendronate should be initiated without delay, even in the absence of a DEXA scan. This patient meets the NICE criteria for bisphosphonate treatment, and while a calcium-rich diet and supplementation may be helpful, they are not sufficient for managing osteoporosis. Zoledronic acid may be considered if the patient cannot tolerate bisphosphonates, but it should not be the first-line treatment.
Managing Osteoporosis in Patients with Fragility Fracture
The management of patients with fragility fractures depends on their age. For patients aged 75 years and above, they are presumed to have underlying osteoporosis and should be started on first-line therapy, which is an oral bisphosphonate, without the need for a DEXA scan. However, the 2014 NOGG guidelines suggest that treatment should be started in all women over the age of 50 years who’ve had a fragility fracture, although BMD measurement may sometimes be appropriate, particularly in younger postmenopausal women.
On the other hand, for patients below 75 years old, a DEXA scan should be arranged to determine their ongoing fracture risk. The results of the scan can be entered into a FRAX assessment, along with the fact that they’ve had a fracture, to determine the appropriate management plan. For instance, if a 79-year-old woman sustains a Colles’ fracture, she is presumed to have osteoporosis and should be started on oral alendronate 70mg once weekly without a DEXA scan.
In summary, managing osteoporosis in patients with fragility fractures requires age consideration and appropriate assessment to determine the best management plan.
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This question is part of the following fields:
- Musculoskeletal
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Question 93
Incorrect
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A 38-year-old woman visits her GP complaining of difficulty with fine movements in her hands. She reports that her hands become pale and numb when exposed to cold temperatures. Upon examination, the GP observes thickening and tightening of the skin over the patient's hands. What other symptom would indicate a possible diagnosis of limited systemic sclerosis?
Your Answer: Hypertension
Correct Answer: Heartburn
Explanation:CREST syndrome is a subtype of limited systemic sclerosis that includes calcinosis, Raynaud’s phenomenon, oesophageal dysmotility, sclerodactyly, and telangiectasia. If a patient experiences heartburn, it may indicate oesophageal dysmotility, which is a feature of CREST syndrome. However, dry eyes are a symptom of Sjogren’s syndrome, which is a separate condition. Hypertension is a complication of diffuse systemic sclerosis, which affects the proximal limbs and trunk and can lead to renal crisis and respiratory involvement. Oliguria is a symptom of renal crisis, which is a complication of diffuse systemic sclerosis.
Understanding Systemic Sclerosis
Systemic sclerosis is a condition that affects the skin and other connective tissues, but its cause is unknown. It is more common in females, with three patterns of the disease. Limited cutaneous systemic sclerosis is characterised by Raynaud’s as the first sign, affecting the face and distal limbs, and associated with anti-centromere antibodies. CREST syndrome is a subtype of limited systemic sclerosis that includes Calcinosis, Raynaud’s phenomenon, oEsophageal dysmotility, Sclerodactyly, and Telangiectasia. Diffuse cutaneous systemic sclerosis affects the trunk and proximal limbs, associated with scl-70 antibodies, and has a poor prognosis. Respiratory involvement is the most common cause of death, with interstitial lung disease and pulmonary arterial hypertension being the primary complications. Renal disease and hypertension are also possible complications, and patients with renal disease should be started on an ACE inhibitor. Scleroderma without internal organ involvement is characterised by tightening and fibrosis of the skin, manifesting as plaques or linear. Antibodies such as ANA, RF, anti-scl-70, and anti-centromere are associated with different types of systemic sclerosis.
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This question is part of the following fields:
- Musculoskeletal
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Question 94
Incorrect
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A 12-year-old girl presents to the clinic with complaints of anterior knee pain for a few weeks, which worsens while walking downstairs. During the examination, a positive shrug test is observed, and she has a valgus knee deformity.
What is the most probable diagnosis?Your Answer: Osteoarthritis
Correct Answer: Chondromalacia patellae
Explanation:Common Causes of Knee Pain in Adolescents and Young Adults
Knee pain is a common complaint among adolescents and young adults. There are several conditions that can cause knee pain, including chondromalacia patellae, osteoarthritis, Osgood-Schlatter disease, osteochondritis dissecans, and patellar subluxation.
Chondromalacia patellae is characterized by abnormal softening of the cartilage on the underside of the patella. It is more common in females, those with valgus knee deformity, and those who are flat-footed. Patients may experience anterior knee pain that worsens with prolonged sitting or activities such as walking down stairs, jumping, running, or climbing. Treatment involves physiotherapy to alter patella-femoral alignment, along with analgesics and ice for symptom relief.
Osteoarthritis is a disease of older patients caused by cartilage breakdown in weight-bearing joints. Osgood-Schlatter disease is a common cause of knee pain in young adolescents, particularly sporty boys, and is caused by overuse of quadriceps. Osteochondritis dissecans is caused by separation of subchondral bone articular cartilage from the joint surface and tends to present in teenagers and young adults with vague and achy joint pain. Patellar subluxation describes the temporary but recurring lateral subluxation of the patella, which can cause anterior patellar pain and joint stiffness.
It is important to note that knee pain in children could be due to hip pathology, such as slipped upper femoral epiphysis. Diagnosis and treatment for these conditions may involve clinical examination, radiographs, and MRI. Treatment may include physiotherapy, analgesics, ice packs, knee braces, and in some cases, surgery.
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This question is part of the following fields:
- Musculoskeletal
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Question 95
Incorrect
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A 30-year-old man comes to you with a painful and swollen left knee. He recently returned from a trip to Spain about 4 weeks ago. He denies any history of knee problems or trauma. Upon examination, you notice that his left knee is warm and swollen, but he has a full range of motion. Additionally, he complains of pain when moving his ankle joints, but there is no visible swelling. You also observe a waxy yellow rash on the soles of both feet. What is the most probable diagnosis?
Your Answer: Gonococcal arthritis
Correct Answer: Reactive arthritis
Explanation:Keratoderma blenorrhagica is the cause of the rash on the soles. The reactive arthritis he is experiencing could be a result of a gastrointestinal infection or Chlamydia.
Understanding Reactive Arthritis: Symptoms and Features
Reactive arthritis is a type of seronegative spondyloarthropathy that is associated with HLA-B27. It was previously known as Reiter’s syndrome, which was characterized by a triad of urethritis, conjunctivitis, and arthritis following a dysenteric illness during World War II. However, later studies revealed that patients could also develop symptoms after a sexually transmitted infection, now referred to as sexually acquired reactive arthritis (SARA).
Reactive arthritis is defined as an arthritis that develops after an infection, but the organism cannot be recovered from the joint. The symptoms typically develop within four weeks of the initial infection and last for around 4-6 months. Approximately 25% of patients experience recurrent episodes, while 10% develop chronic disease. The arthritis is usually an asymmetrical oligoarthritis of the lower limbs, and patients may also experience dactylitis.
Other symptoms of reactive arthritis include urethritis, conjunctivitis (seen in 10-30% of patients), and anterior uveitis. Skin symptoms may also occur, such as circinate balanitis (painless vesicles on the coronal margin of the prepuce) and keratoderma blenorrhagica (waxy yellow/brown papules on palms and soles). A helpful mnemonic to remember the symptoms of reactive arthritis is Can’t see, pee, or climb a tree.
In conclusion, understanding the symptoms and features of reactive arthritis is crucial for early diagnosis and treatment. While the condition can be recurrent or chronic, prompt management can help alleviate symptoms and improve quality of life for affected individuals.
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This question is part of the following fields:
- Musculoskeletal
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Question 96
Incorrect
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A 35-year-old gardener complains of a gradually worsening left elbow pain for the past two weeks. The pain intensifies when the elbow is straight and there is resistance during wrist extension and supination. What is the probable diagnosis?
Your Answer: Carpal tunnel syndrome
Correct Answer: Lateral epicondylitis
Explanation:The correct diagnosis is lateral epicondylitis, which is caused by repetitive arm movements. The pain is typically more severe when the wrist is extended against resistance and the elbow is straightened. This description does not match the symptoms of anterior interosseous syndrome, carpal tunnel syndrome, or medial epicondylitis.
Understanding Lateral Epicondylitis
Lateral epicondylitis, commonly known as tennis elbow, is a condition that often occurs after engaging in activities that the body is not accustomed to, such as painting or playing tennis. It is most prevalent in individuals aged 45-55 years and typically affects the dominant arm. The primary symptom of this condition is pain and tenderness localized to the lateral epicondyle. The pain is often exacerbated by wrist extension against resistance with the elbow extended or supination of the forearm with the elbow extended. Episodes of lateral epicondylitis can last between 6 months and 2 years, with patients experiencing acute pain for 6-12 weeks.
To manage lateral epicondylitis, it is essential to avoid muscle overload and engage in simple analgesia. Steroid injections and physiotherapy are also viable options for managing the condition. By understanding the symptoms and management options for lateral epicondylitis, individuals can take the necessary steps to alleviate pain and discomfort associated with this condition.
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This question is part of the following fields:
- Musculoskeletal
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Question 97
Incorrect
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A 48-year-old man comes to the Emergency Department with a painful, swollen left ankle after injuring it two days ago. He reports midfoot zone pain and has been using crutches since the injury. What is the most probable finding that would indicate the necessity for an X-ray?
Your Answer: Bruising of the second and third toes
Correct Answer: Navicular bone tenderness
Explanation:Assessing Ankle Injuries: Indications for X-rays
When evaluating a patient with ankle pain, the Ottawa Rules can be used to determine if an X-ray is necessary. These rules have a high sensitivity for excluding fractures and can be applied to patients between the ages of three and 55. Bony tenderness at the navicular meets the criteria for an X-ray. However, bruising of the toes or non-tender swelling over the lateral malleolus do not necessarily require an X-ray. Inability to weight bear for four steps or tenderness at the base of the fifth metatarsal may indicate the need for an X-ray. Treatment for uncomplicated fractured toes involves neighbour strapping.
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This question is part of the following fields:
- Musculoskeletal
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Question 98
Correct
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A 50-year-old man visits his GP complaining of lower back pain that has been gradually worsening over the past 4 years. During a comprehensive back examination, the GP performs a straight leg raise test, which elicits increased pain in the patient's leg. What pathology is suggested by a positive straight leg raise?
Your Answer: Sciatic nerve pain
Explanation:The positive straight leg raise test involves lifting the leg straight up and if this causes pain in the sciatic nerve area, the test is considered positive. Ankylosing spondylitis is a chronic inflammatory disease that causes lower back pain, particularly in the morning, and is often relieved by exercise. This condition typically starts in early adulthood and is linked to the human leukocyte antigen B27 (HLA-B27). Spinal stenosis is characterized by back and/or leg pain, numbness, and weakness that worsens with walking but improves with rest. Facet joint pain is felt in the back over the facets of the cervical and lumbar vertebrae and is aggravated by stress on the facet joints, such as extending the back. Vertebral compression fractures, which can be detected by x-ray, usually result from osteoporosis, trauma, or cancer and cause acute or chronic back pain.
Lower back pain is a common issue that is often caused by muscular strain. However, it is important to be aware of potential underlying causes that may require specific treatment. Certain red flags should be considered, such as age under 20 or over 50, a history of cancer, night pain, trauma, or systemic illness. There are also specific causes of lower back pain that should be kept in mind. Facet joint pain may be acute or chronic, worse in the morning and on standing, and typically worsens with back extension. Spinal stenosis may cause leg pain, numbness, and weakness that is worse on walking and relieved by sitting or leaning forward. Ankylosing spondylitis is more common in young men and causes stiffness that is worse in the morning and improves with activity. Peripheral arterial disease may cause pain on walking and weak foot pulses. It is important to consider these potential causes and seek appropriate diagnosis and treatment.
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This question is part of the following fields:
- Musculoskeletal
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Question 99
Incorrect
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A 26-year-old woman presents to gastroenterology clinic with severe ulcerative colitis. Before starting azathioprine to improve her symptoms, what potential contraindications should be ruled out?
Your Answer: Gal-1-put deficiency
Correct Answer: Thiopurine methyltransferase deficiency (TPMT)
Explanation:Azathioprine is a medication that is broken down into mercaptopurine, which is an active compound that inhibits the production of purine. To determine if someone is at risk for azathioprine toxicity, a test for thiopurine methyltransferase (TPMT) may be necessary. Adverse effects of this medication include bone marrow depression, which can be detected through a full blood count if there are signs of infection or bleeding, as well as nausea, vomiting, pancreatitis, and an increased risk of non-melanoma skin cancer. It is important to note that there is a significant interaction between azathioprine and allopurinol, so lower doses of azathioprine should be used in conjunction with allopurinol. Despite these potential side effects, azathioprine is generally considered safe to use during pregnancy.
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This question is part of the following fields:
- Musculoskeletal
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Question 100
Incorrect
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A 56-year-old construction worker comes in for evaluation. He has a history of osteoarthritis in his hands but no other significant medical history. Despite taking paracetamol regularly, he is still experiencing significant pain, particularly in the base of his thumbs. What would be the most appropriate next step in his management?
Your Answer:
Correct Answer: Add topical ibuprofen
Explanation:According to the 2008 NICE guidelines, the initial treatment for osteoarthritis should involve the administration of paracetamol and topical NSAIDs, particularly for knee and hand joints.
The Role of Glucosamine in Osteoarthritis Management
Osteoarthritis (OA) is a common condition that affects the joints, causing pain and stiffness. The National Institute for Health and Care Excellence (NICE) published guidelines in 2014 on the management of OA, which includes non-pharmacological and pharmacological treatments. Glucosamine, a normal constituent of glycosaminoglycans in cartilage and synovial fluid, has been studied for its potential benefits in OA management.
Several double-blind randomized controlled trials (RCTs) have reported significant short-term symptomatic benefits of glucosamine in knee OA, including reduced joint space narrowing and improved pain scores. However, more recent studies have produced mixed results. The 2008 NICE guidelines do not recommend the use of glucosamine, and a 2008 Drug and Therapeutics Bulletin review advised against prescribing it on the NHS due to limited evidence of cost-effectiveness.
Despite the conflicting evidence, some patients may still choose to use glucosamine as a complementary therapy for OA management. It is important for healthcare professionals to discuss the potential benefits and risks of glucosamine with their patients and to consider individual patient preferences and circumstances.
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This question is part of the following fields:
- Musculoskeletal
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