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Question 1
Correct
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A 50-year-old male patient complains of a painful swelling at the back of his elbow, without any history of injury. Upon examination, an erythematosus and tender swelling is observed. What is the probable diagnosis?
Your Answer: Olecranon bursitis
Explanation: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 2
Correct
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An 80-year-old woman complains of feeling generally fatigued and experiencing muscle aches. She reports stiffness and pain in her back, arms, and thighs, especially in the morning. These symptoms have persisted for the past two weeks, despite her previously being in good health. Upon examination, the only notable finding is tenderness in her deltoid and thigh muscles, with normal muscle strength. What is the probable diagnosis?
Your Answer: Polymyalgia rheumatica
Explanation: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 arthritis, 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 15 mg/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 3
Correct
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A 30-year-old woman presents to the rheumatology clinic with a diagnosis of systemic lupus erythematosus. You intend to initiate monotherapy with hydroxychloroquine. What particular monitoring should be considered before starting this medication?
Your Answer: Visual acuity and fundoscopy
Explanation:Hydroxychloroquine can cause severe and permanent retinopathy, which can be detected through visual acuity and fundoscopy. It is recommended to conduct baseline screening and annual screening after 5 years of use. Echocardiography, liver function tests, pregnancy tests, and tuberculosis screening are not necessary for monitoring hydroxychloroquine use.
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 4
Correct
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A 54-year-old woman presents to the rheumatology clinic with severe Raynaud's phenomenon and finger arthralgia. Upon examination, you observe tight and shiny skin on her fingers, as well as several telangiectasia on her upper torso and face. She is also awaiting a gastroscopy for heartburn investigation. Which antibody is the most specific for the underlying condition?
Your Answer: Anti-centromere antibodies
Explanation:The most specific test for limited cutaneous systemic sclerosis among patients with systemic sclerosis is the anti-centromere antibodies.
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 5
Correct
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A twenty-seven-year-old male presents to the emergency department with an ache-like pain in his back that radiates to his right groin. The pain started three days ago, has been progressively worsening, and is exacerbated by walking. He has attempted to alleviate the pain with paracetamol and ibuprofen, but to no avail. He also reports feeling feverish and experiencing chills for the past 24 hours.
The patient has no significant medical history but is a heavy smoker, consuming 20 cigarettes a day, drinks 30 units of alcohol per week, and injects heroin daily. Upon examination, his heart rate is 96/minute, respiratory rate is 14/minute, blood pressure is 116/72 mmHg, and oxygen saturations are 98%. His temperature is 38.4 ºC.
During examination of the spine and right hip, he experiences pain on movement of the hip joint, particularly flexion, but is not tender on palpation of the spine or hip joint. There is no evidence of swelling or erythema of the spine or hips, and no difference in temperature. Abdominal examination reveals a soft and non-tender abdomen, without organomegaly and present bowel sounds. The kidneys are non-ballotable.
What is the most likely diagnosis?Your Answer: Iliopsoas abscess
Explanation:When a patient presents with fever and back or flank pain, it is important to consider the possibility of an iliopsoas abscess. This condition is indicated by pain in the hip joint area, along with a fever and pain during movement. Iliopsoas abscess occurs when there is a collection of pus within the iliopsoas muscle, which extends from the T12 – L5 vertebrae to the femur’s lesser trochanter. Intravenous drug use is a risk factor for developing this condition.
Vertebral osteomyelitis, on the other hand, usually presents with tenderness, swelling, and weakness of the surrounding muscles over the infected vertebrae. Avascular necrosis of the femoral head may cause groin pain, but given the patient’s fever and IVDU status, an iliopsoas abscess is more likely. Kidney stones can cause constant pain from the loin to the groin, while appendicitis usually presents with pain in the umbilical region or right iliac fossa. The patient’s normal abdominal exam also makes appendicitis less likely.
An iliopsoas abscess is a condition where pus accumulates in the iliopsoas compartment, which includes the iliacus and psoas muscles. There are two types of iliopsoas abscesses: primary and secondary. Primary abscesses occur due to the spread of bacteria through the bloodstream, with Staphylococcus aureus being the most common cause. Secondary abscesses are caused by underlying conditions such as Crohn’s disease, diverticulitis, colorectal cancer, UTIs, GU cancers, vertebral osteomyelitis, femoral catheterization, lithotripsy, endocarditis, and intravenous drug use. Secondary abscesses have a higher mortality rate compared to primary abscesses.
The clinical features of an iliopsoas abscess include fever, back/flank pain, limp, and weight loss. During a clinical examination, the patient is positioned supine with the knee flexed and the hip mildly externally rotated. Specific tests are performed to diagnose iliopsoas inflammation, such as placing a hand proximal to the patient’s ipsilateral knee and asking the patient to lift their thigh against the hand, which causes pain due to contraction of the psoas muscle. Another test involves lying the patient on the normal side and hyperextending the affected hip, which should elicit pain as the psoas muscle is stretched.
The investigation of choice for an iliopsoas abscess is a CT scan of the abdomen. Management involves antibiotics and percutaneous drainage, which is successful in around 90% of cases. Surgery is only indicated if percutaneous drainage fails or if there is another intra-abdominal pathology that requires surgery.
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This question is part of the following fields:
- Musculoskeletal
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Question 6
Incorrect
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A 28-year-old man presents to his doctor with left knee pain that has been bothering him for a week. He reports pain when bearing weight and swelling around the joint. He denies experiencing pain in any other joints, but does mention discomfort while urinating.
During the physical exam, the patient has a temperature of 37.9ºC and his left knee is warm and swollen. Additionally, he has inflamed conjunctivae.
Lab results show a hemoglobin level of 151 g/L (135-180), platelets at 333 * 109/L (150 - 400), white blood cell count at 7.6 * 109/L (4.0 - 11.0), and a CRP level of 99 mg/L (< 5).
The doctor decides to perform a knee joint aspiration. What would be the expected findings from the joint aspirate?Your Answer: Gram positive cocci
Correct Answer: No organism growth on gram stain
Explanation:Reactive arthritis is the likely diagnosis for this patient, as they present with a triad of symptoms including arthritis, conjunctivitis, and urethritis. This condition is associated with HLA-B27 and is often triggered by a previous infection, such as a sexually transmitted disease or diarrheal illness. Unlike other types of infective arthritis, no organism can be recovered from the affected joint in reactive arthritis. Therefore, the absence of organism growth on gram stain is expected in this case. Gram negative cocci may be seen in cases of Neisseria gonorrhoeae infection, which can cause septic arthritis, but the lack of additional symptoms makes reactive arthritis more likely. Gram positive cocci are typically found in cases of septic arthritis, but the presence of dysuria and conjunctivitis suggests reactive arthritis instead. Negative birefringent crystals are seen in gout, which is characterized by an acutely inflamed joint and is associated with a high meat diet, typically in men over 40 years old.
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, further 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 arthritis that occurs after an infection where the organism cannot be found in the joint. The post-STI form is more common in men, while the post-dysenteric form has an equal incidence in both sexes. The most common organisms associated with reactive arthritis are listed in the table below.
Management of reactive arthritis is mainly symptomatic, with analgesia, NSAIDs, and intra-articular steroids being used. Sulfasalazine and methotrexate may be used for persistent disease. Symptoms usually last for less than 12 months. It is worth noting that the term Reiter’s syndrome is no longer used due to the fact that Reiter was a member of the Nazi party.
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This question is part of the following fields:
- Musculoskeletal
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Question 7
Incorrect
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A 55-year-old woman with chronic kidney disease presents with an acutely painful joint. The joint is red and swollen upon examination. The patient reports waking up with the pain, which has worsened to a 9/10 severity throughout the day. Despite taking simple analgesia, the pain has not improved.
The patient's vital signs are as follows:
- Heart rate: 115 bpm
- Blood pressure: 120/56 mmHg
- Respiratory rate: 21
- Oxygen saturation: 98%
- Temperature: 39.1°C
Based on the symptoms, what is the most likely joint affected?Your Answer: Base of big toe
Correct Answer: Knee
Explanation:Septic arthritis is most commonly found in the knee joint in adults.
The symptoms described in the scenario, such as acute swelling, pain, redness, and fever, are indicative of septic arthritis. In adults, the knee joint is the most frequently affected site for this condition. The patient’s systemic illness rules out gout as a possible diagnosis, which typically presents differently and is less common in females. Pseudogout, which is more common in women and can also affect the knee joint, is another possible differential diagnosis. However, given the patient’s overall presentation, septic arthritis is the most likely diagnosis. Ankle joint septic arthritis is possible but less common, while the base of the big toe is more commonly associated with acute gout attacks. Although septic arthritis can affect large joints like the hip, the knee joint is still the most commonly affected site in adults.
Septic Arthritis in Adults: Causes, Symptoms, and Treatment
Septic arthritis is a condition that occurs when bacteria infect a joint, leading to inflammation and pain. The most common organism that causes septic arthritis in adults is Staphylococcus aureus, but in young adults who are sexually active, Neisseria gonorrhoeae is the most common organism. The infection usually spreads through the bloodstream from a distant bacterial infection, such as an abscess. The knee is the most common location for septic arthritis in adults. Symptoms include an acute, swollen joint, restricted movement, warmth to the touch, and fever.
To diagnose septic arthritis, synovial fluid sampling is necessary and should be done before administering antibiotics if necessary. Blood cultures may also be taken to identify the cause of the infection. Joint imaging may also be used to confirm the diagnosis.
Treatment for septic arthritis involves intravenous antibiotics that cover Gram-positive cocci. Flucloxacillin or clindamycin is recommended if the patient is allergic to penicillin. Antibiotic treatment is typically given for several weeks, and patients are usually switched to oral antibiotics after two weeks. Needle aspiration may be used to decompress the joint, and arthroscopic lavage may be required in some cases.
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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 57-year-old woman received a call from an out of hours GP who advised her to go to the emergency department due to abnormalities found on her blood tests during her annual well woman check-up. She has a medical history of systemic sclerosis and uses topical emollients on her hands. She denies any allergies, is an ex-smoker, and does not consume alcohol. Her blood results are as follows:
- Hb 110 g/L (115 - 160)
- Platelets 151 * 109/L (150 - 400)
- WBC 4.5 * 109/L (4.0 - 11.0)
- Na+ 137 mmol/L (135 - 145)
- K+ 4.2 mmol/L (3.5 - 5.0)
- Urea 11.5 mmol/L (2.0 - 7.0)
- Creatinine 164 µmol/L (55 - 120)
- eGFR 30 ml/min (>90)
Upon observation, the nurse notes that the patient's blood pressure is high. In the right arm, it is 187/95 mmHg and in the left arm is 191/94 mmHg. What is the most appropriate treatment to initiate for this patient?Your Answer: Lisinopril
Explanation:When systemic sclerosis leads to kidney problems, hypertension and AKI are common symptoms. The preferred treatment for this is ACE inhibitors, with lisinopril being the appropriate choice. In severe cases of sclerodermic renal crisis, microangiopathic haemolytic anaemia may also occur. Amlodipine is a calcium channel blocker used to manage hypertension, while bendroflumethiazide is a thiazide diuretic that can also be used for this purpose. Doxazosin, on the other hand, is an α blocker used to treat hypertension.
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 9
Incorrect
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A 65-year-old woman visits her GP complaining of a persistent headache that has been bothering her for two weeks. The pain is more intense on the right side and is aggravated when she combs her hair. She also experiences discomfort in her jaw when eating. Her neurological and fundoscopy examinations reveal no abnormalities, and she is referred to the emergency department.
Upon admission, the patient is prescribed high-dose oral prednisolone and undergoes a temporal artery biopsy, which yields normal results. What is the next most appropriate course of action for her treatment?Your Answer: Perform an emergency computed tomography (CT) of her brain
Correct Answer: Continue high-dose prednisolone and repeat biopsy
Explanation:Performing an emergency computed tomography (CT) of the brain is not necessary for this patient. Emergency CT head scans are typically reserved for cases of head injury with symptoms such as reduced GCS, repeated vomiting, skull base fracture signs, post-traumatic seizures, or focal neurological deficits. Elderly patients may require a CT scan if they have experienced a fall with head injury or confusion.
Stopping high-dose prednisolone and referring the patient to a neurology clinic is not recommended. With a high suspicion of GCA, it is crucial to continue corticosteroid treatment to prevent inflammation from spreading to the eye. Any vision changes caused by GCA are typically irreversible, making it an acute problem that cannot wait for a referral to a neurology clinic.
Switching the patient to a lower dose of oral prednisolone is not advised. There is no evidence to suggest that reducing the dose of prednisolone is beneficial for GCA if the biopsy is negative. It is important to remember that a negative biopsy result may be due to skip lesions and not because the diagnosis is less likely.
Temporal arthritis, also known as giant cell arthritis, is a condition that affects medium and large-sized arteries and is of unknown cause. It typically occurs in individuals over the age of 50, with the highest incidence in those in their 70s. Early recognition and treatment are crucial to minimize the risk of complications, such as permanent loss of vision. Therefore, when temporal arthritis is suspected, urgent referral for assessment by a specialist and prompt treatment with high-dose prednisolone is necessary.
Temporal arthritis often overlaps with polymyalgia rheumatica, with around 50% of patients exhibiting features of both conditions. Symptoms of temporal arthritis include headache, jaw claudication, and tender, palpable temporal artery. Vision testing is a key investigation in all patients, as anterior ischemic optic neuropathy is the most common ocular complication. This results from occlusion of the posterior ciliary artery, leading to ischemia of the optic nerve head. Fundoscopy typically shows a swollen pale disc and blurred margins. Other symptoms may include aching, morning stiffness in proximal limb muscles, lethargy, depression, low-grade fever, anorexia, and night sweats.
Investigations for temporal arthritis include raised inflammatory markers, such as an ESR greater than 50 mm/hr and elevated CRP. A temporal artery biopsy may also be performed, and skip lesions may be present. Treatment for temporal arthritis involves urgent high-dose glucocorticoids, which should be given as soon as the diagnosis is suspected and before the temporal artery biopsy. If there is no visual loss, high-dose prednisolone is used. If there is evolving visual loss, IV methylprednisolone is usually given prior to starting high-dose prednisolone. Urgent ophthalmology review is necessary, as visual damage is often irreversible. Other treatments may include bone protection with bisphosphonates and low-dose aspirin.
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This question is part of the following fields:
- Musculoskeletal
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Question 10
Correct
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A 7-year-old boy trips during recess and arrives at the Emergency Department with a severely painful left arm. X-rays reveal a distal humerus supracondylar fracture that is displaced posteriorly and closed. What signs would suggest an immediate requirement for surgery?
Your Answer: Distal neurovascular deficit
Explanation:Fractures in the region of the distal humerus pose a risk of injury to important structures in the arm, particularly the brachial artery. If the fractured end of the humerus shears the artery, it can result in distal neurovascular loss, which requires immediate exploration. While considering other options is important when managing such patients, they may occur without any neurovascular injury. Angulation is significant but not the most crucial factor, as it can occur without causing any distal deficits. Pain alone is not an indication for surgery, as many injuries can be painful without serious consequences. Although significant clinical deformity is highly suggestive of a severe injury, it can occur without limb-threatening consequences. Posterior displacement does not necessarily correlate with neurovascular injury, as bone fragments may miss important structures. Therefore, if there is any distal deficit, surgery is urgently required, regardless of the appearance of the arm or X-ray.
Fracture Management: Understanding Types and Treatment
Fractures can occur due to trauma, stress, or pathological reasons. Diagnosis involves evaluating the site and type of injury, as well as associated injuries and neurovascular deficits. X-rays are important in assessing changes in bone length, distal bone angulation, rotational effects, and foreign material. Fracture types include oblique, comminuted, segmental, transverse, and spiral. It is also important to distinguish open from closed injuries, with the Gustilo and Anderson classification system being the most common for open fractures. Management involves immobilizing the fracture, monitoring neurovascular status, managing infection, and debriding open fractures within 6 hours of injury.
To ensure proper fracture management, it is crucial to understand the different types of fractures and their causes. Diagnosis involves not only evaluating the fracture itself, but also any associated injuries and neurovascular deficits. X-rays are an important tool in assessing the extent of the injury. It is also important to distinguish between open and closed fractures, with open fractures requiring immediate attention and debridement. Proper management involves immobilizing the fracture, monitoring neurovascular status, and managing infection. By understanding the different types of fractures and their treatment, healthcare professionals can provide effective care for patients with fractures.
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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 61-year-old man arrives at the Emergency Department complaining of intense pain in his right ankle and 1st metatarsophalangeal joint. The pain started overnight and has worsened since he took his furosemide in the morning. He is also taking omeprazole for a recent peptic ulcer. What medication should be prescribed to alleviate his symptoms?
Your Answer: Colchicine
Explanation:If a patient has a peptic ulcer and cannot take NSAIDs for acute gout treatment, colchicine is a suitable alternative.
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 12
Incorrect
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A 40-year-old couple, Mr and Mrs Johnson, have been referred to a fertility clinic by their GP due to their inability to conceive after 18 months of regular unprotected sexual intercourse. Mrs Johnson has well-controlled asthma and no other medical conditions, while Mr Johnson has a history of rheumatoid arthritis, schizophrenia, and hypothyroidism for which he takes sulfasalazine, ibuprofen, omeprazole, olanzapine, and levothyroxine. Mr Johnson's semen analysis reveals a count of 14 million/mL (15-200 million/mL). Which medication is the most likely cause of this result?
Your Answer: Levothyroxine
Correct Answer: Sulfasalazine
Explanation:Sulfasalazine: A DMARD for Inflammatory Arthritis and Bowel Disease
Sulfasalazine is a type of disease modifying anti-rheumatic drug (DMARD) that is commonly used to manage inflammatory arthritis, particularly rheumatoid arthritis, as well as inflammatory bowel disease. This medication is a prodrug for 5-ASA, which works by reducing neutrophil chemotaxis and suppressing the proliferation of lymphocytes and pro-inflammatory cytokines.
However, caution should be exercised when using sulfasalazine in patients with G6PD deficiency or those who are allergic to aspirin or sulphonamides due to the risk of cross-sensitivity. Adverse effects of sulfasalazine may include oligospermia, Stevens-Johnson syndrome, pneumonitis/lung fibrosis, myelosuppression, Heinz body anaemia, megaloblastic anaemia, and the potential to color tears and stain contact lenses.
Despite these potential side effects, sulfasalazine is considered safe to use during pregnancy and breastfeeding, making it a viable option for women who require treatment for inflammatory arthritis or bowel disease. Overall, sulfasalazine is an effective DMARD that can help manage the symptoms of these conditions and improve patients’ quality of life.
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This question is part of the following fields:
- Musculoskeletal
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Question 13
Correct
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A 22-year-old man presents with a 5-month history of low back pain and stiffness that lasts for 20 minutes in the morning. He reports that his pain improves with exercise and taking ibuprofen. He denies any gastrointestinal, genitourinary, or skin symptoms. During the examination, he exhibits limited lumbar flexion as determined by Schober's test. An x-ray of his lumbar spine and sacroiliac joints has been ordered. What radiographic finding is likely to be observed?
Your Answer: Syndesmophytes
Explanation: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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A 25-year-old female soccer player presents to the clinic with intense left knee discomfort. She reports that she landed awkwardly on her knee while playing soccer and heard a 'snapping sound' followed by significant swelling around the left knee joint. During the physical examination, there was an increase in laxity on anterior drawer of the left tibia compared to the femur. What is the most suitable test to confirm the diagnosis?
Your Answer: Left knee magnetic resonance imaging (MRI)
Explanation:The anterior cruciate ligament (ACL) is a knee ligament that is frequently injured, with non-contact injuries being the most common cause. However, a lateral blow to the knee or skiing can also cause ACL injuries. Symptoms of an ACL injury include a sudden popping sound, knee swelling, and a feeling of instability or that the knee may give way. To diagnose an ACL injury, doctors may perform an anterior draw test or a Lachman’s test. During the anterior draw test, the patient lies on their back with their knee at a 90-degree angle, and the examiner pulls the tibia forward to assess the amount of anterior motion in comparison to the femur. An intact ACL should prevent forward translational movement. Lachman’s test is a variant of the anterior draw test, but the knee is at a 20-30 degree angle, and it is considered more reliable than the anterior draw test.
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This question is part of the following fields:
- Musculoskeletal
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Question 15
Incorrect
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A 82-year-old female is brought to the emergency department following a fall at her nursing home. She has a medical history of osteoporosis, dementia, and is considered clinically frail. During examination, her left leg is found to be shortened and her hip externally rotated. An X-ray reveals a displaced intracapsular fracture. What is the most suitable course of action for this patient?
Your Answer: Total hip replacement
Correct Answer: Hemiarthroplasty
Explanation:For patients with a displaced hip fracture, hemiarthroplasty or total hip replacement is the recommended treatment. In this case, the patient has a confirmed intracapsular fracture of the neck of femur, which carries a high risk of avascular necrosis. Hemiarthroplasty or total hip replacement is preferred for patients over 70 years old, with hemiarthroplasty being the better option for those with serious comorbidities, dementia, or immobility. Therefore, the patient should be managed with a hemiarthroplasty. The use of a dynamic hip screw, internal fixation, or Intramedullary nail is not appropriate for this type of fracture.
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 16
Incorrect
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A 49-year-old female without significant medical history was diagnosed with deep vein thrombosis without any known risk factors or precipitating events. The patient was successfully treated with dalteparin and subsequent thrombophilia screening revealed moderately elevated anticardiolipin antibodies on two separate occasions, twelve weeks apart. What is the most suitable long-term plan for managing this patient?
Your Answer: Rivaroxaban
Correct Answer: Warfarin
Explanation:Patients diagnosed with antiphospholipid syndrome and a history of unprovoked thrombosis should receive lifelong warfarin as the preferred long-term anticoagulant. While unfractionated heparin or low molecular weight heparin may be used for acute episodes of thrombosis, they are not recommended for long-term anticoagulation in this condition. Failure to provide anticoagulation therapy to these patients is inappropriate due to their high risk of recurrent thrombosis. Additionally, the MHRA has advised against the use of direct-acting oral anticoagulants like rivaroxaban for long-term therapy in antiphospholipid syndrome patients due to an increased risk of thrombotic events compared to warfarin. Therefore, rivaroxaban is not a suitable management option.
Antiphospholipid syndrome is a condition that can be acquired and is characterized by a higher risk of both venous and arterial thrombosis, recurrent fetal loss, and thrombocytopenia. It can occur as a primary disorder or as a secondary condition to other diseases, with systemic lupus erythematosus being the most common. One important point to remember for exams is that antiphospholipid syndrome can cause a paradoxical increase in the APTT. This is due to an ex-vivo reaction of the lupus anticoagulant autoantibodies with phospholipids involved in the coagulation cascade. Other features of this condition include livedo reticularis, pre-eclampsia, and pulmonary hypertension.
Antiphospholipid syndrome can also be associated with other autoimmune disorders, lymphoproliferative disorders, and, rarely, phenothiazines. Management of this condition is based on EULAR guidelines. Primary thromboprophylaxis involves low-dose aspirin, while secondary thromboprophylaxis depends on the type of thromboembolic event. Initial venous thromboembolic events require lifelong warfarin with a target INR of 2-3, while recurrent venous thromboembolic events require lifelong warfarin and low-dose aspirin. Arterial thrombosis should be treated with lifelong warfarin with a target INR of 2-3.
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This question is part of the following fields:
- Musculoskeletal
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Question 17
Correct
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A 20-year-old male patient arrives at the emergency department following a fall from his skateboard, where he landed on his outstretched right hand. On examination, the patient reports experiencing considerable pain and tenderness between the extensor pollicis longus and extensor pollicis brevis tendons of his right hand. An X-ray is conducted, but no abnormalities are detected.
What is the best initial approach to managing this injury?Your Answer: Immobilise using Futuro splint or standard below-elbow backslab before specialist review
Explanation:For non-displaced or minimally displaced scaphoid fractures (less than 0.5mm), immobilization for 6 weeks is sufficient for union. However, since these fractures can lead to avascular necrosis and other long-term complications, it is crucial to seek specialized medical attention. It is unnecessary to immobilize the elbow with a standard above-elbow backslab for suspected scaphoid fractures.
Understanding Scaphoid Fractures
A scaphoid fracture is a type of wrist fracture that typically occurs when a person falls onto an outstretched hand or during contact sports. It is important to recognize this type of fracture due to the unusual blood supply of the scaphoid bone. Interruption of the blood supply can lead to avascular necrosis, which is a serious complication. Patients with scaphoid fractures typically present with pain along the radial aspect of the wrist and loss of grip or pinch strength. Clinical examination is highly sensitive and specific when certain signs are present, such as tenderness over the anatomical snuffbox and pain on telescoping of the thumb.
Plain film radiographs should be requested, including scaphoid views, but the sensitivity in the first week of injury is only 80%. A CT scan may be requested in the context of ongoing clinical suspicion or planning operative management, while MRI is considered the definite investigation to confirm or exclude a diagnosis. Initial management involves immobilization with a splint or backslab and referral to orthopaedics. Orthopaedic management depends on the patient and type of fracture, with undisplaced fractures of the scaphoid waist typically treated with a cast for 6-8 weeks. Displaced scaphoid waist fractures require surgical fixation, as do proximal scaphoid pole fractures. Complications of scaphoid fractures include non-union, which can lead to pain and early osteoarthritis, and avascular necrosis.
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This question is part of the following fields:
- Musculoskeletal
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Question 18
Incorrect
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A 20-year-old basketball player arrives at the emergency department complaining of a sudden popping sensation in his left heel. During the physical examination, a noticeable dip is palpable on the back of his ankle. The patient reports that he was prescribed ciprofloxacin for a chest infection while on a recent trip to Italy. What is the most suitable test to confirm the suspected diagnosis?
Your Answer: Magnetic resonance imaging (MRI) ankle
Correct Answer: Ultrasound ankle
Explanation: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 19
Correct
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Sophie is a 26-year-old woman who has come to you with a rash on her cheeks and bridge of her nose. She has also been experiencing non-specific muscle and joint aches and extreme fatigue. You want to run some blood tests to check for any systemic causes, specifically for systemic lupus erythematosus (SLE). Which of the following positive blood tests would strongly indicate a diagnosis of SLE?
Out of the options below, which of the following blood tests if positive would be highly suggestive of this diagnosis?Your Answer: Anti-dsDNA
Explanation:The anti-dsDNA test is highly specific for detecting lupus, making it useful in ruling out systemic lupus erythematosus if the results are negative. On the other hand, anti-CCP is utilized in diagnosing rheumatoid arthritis, while anti-La is primarily present in individuals with Sjogren’s syndrome. Although anti-La can also be found in those with lupus, it lacks specificity. Interestingly, infants born to mothers with anti-La and anti-Ro antibodies have an increased risk of developing neonatal lupus. ANCA is an antibody that targets neutrophils and is observed in patients with autoimmune vasculitis.
Systemic lupus erythematosus (SLE) can be investigated through various tests, including antibody tests. ANA testing is highly sensitive, making it useful for ruling out SLE, but it has low specificity. About 99% of SLE patients are ANA positive. Rheumatoid factor testing is positive in 20% of SLE patients. Anti-dsDNA testing is highly specific (>99%), but less sensitive (70%). Anti-Smith testing is also highly specific (>99%), but only 30% of SLE patients test positive. Other antibody tests include anti-U1 RNP, SS-A (anti-Ro), and SS-B (anti-La).
Monitoring of SLE can be done through various markers, including inflammatory markers such as ESR. During active disease, CRP levels may be normal, but a raised CRP may indicate an underlying infection. Complement levels (C3, C4) are low during active disease due to the formation of complexes that lead to the consumption of complement. Anti-dsDNA titres can also be used for disease monitoring, but it is important to note that they are not present in all SLE patients. Proper monitoring of SLE is crucial for effective management of the disease.
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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 with a history of rheumatoid arthritis is experiencing severe joint pain and synovitis in her hands and wrists. Despite being prescribed methotrexate and sulfasalazine, her symptoms have not improved. Her rheumatologist has recommended switching to adalimumab. Before starting this medication, which test must be performed?
Your Answer: Thiopurine methyltransferase (TPMT) activity
Correct Answer: Chest x-ray
Explanation:Managing Rheumatoid Arthritis with Disease-Modifying Therapies
The management of rheumatoid arthritis (RA) has significantly improved with the introduction of disease-modifying therapies (DMARDs) in the past decade. Patients with joint inflammation should start a combination of DMARDs as soon as possible, along with analgesia, physiotherapy, and surgery. In 2018, NICE updated their guidelines for RA management, recommending DMARD monotherapy with a short course of bridging prednisolone as the initial step. Monitoring response to treatment is crucial, and NICE suggests using a combination of CRP and disease activity to assess it. Flares of RA are often managed with corticosteroids, while methotrexate is the most widely used DMARD. Other DMARDs include sulfasalazine, leflunomide, and hydroxychloroquine. TNF-inhibitors are indicated for patients with an inadequate response to at least two DMARDs, including methotrexate. Etanercept, infliximab, and adalimumab are some of the TNF-inhibitors available, each with their own risks and administration methods. Rituximab and Abatacept are other DMARDs that can be used, but the latter is not currently recommended by NICE.
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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 50-year-old woman has arrived at the emergency department via ambulance after twisting her left ankle while hiking in a mountainous national park. She has no significant medical history. X-rays were taken and the radiologist's report states that there is a minimally displaced, transverse fracture distally through the lateral malleolus, below the level of the talar dome, without talar shift. The medial malleolus is unaffected. What is the most suitable immediate management?
Your Answer: Allow weight bearing as tolerated in a controlled ankle motion (CAM) boot
Explanation:According to the radiologist’s report, the patient has a stable Weber A fracture of the lateral malleolus (distal fibula) that is minimally displaced and located below the tibiofibular syndesmosis. As a result, immobilization in a back slab is unnecessary, and reduction is not required. RICE treatment is not recommended as it does not provide adequate immobilization, which can be an effective form of pain relief. Instead, a controlled ankle motion (CAM) boot is the appropriate management option as it allows weight-bearing while providing immobilization. Urgent surgical intervention is not necessary in this case due to the fracture’s stability and minimal displacement.
Ankle Fractures and their Classification
Ankle fractures are a common reason for emergency department visits. To minimize the unnecessary use of x-rays, the Ottawa ankle rules are used to aid in clinical examination. These rules state that x-rays are only necessary if there is pain in the malleolar zone and an inability to weight bear for four steps, tenderness over the distal tibia, or bone tenderness over the distal fibula. There are several classification systems for describing ankle fractures, including the Potts, Weber, and AO systems. The Weber system is the simplest and is based on the level of the fibular fracture. Type A is below the syndesmosis, type B fractures start at the level of the tibial plafond and may extend proximally to involve the syndesmosis, and type C is above the syndesmosis, which may itself be damaged. A subtype known as a Maisonneuve fracture may occur with a spiral fibular fracture that leads to disruption of the syndesmosis with widening of the ankle joint, requiring surgery.
Management of Ankle Fractures
The management of ankle fractures depends on the stability of the ankle joint and patient co-morbidities. Prompt reduction of all ankle fractures is necessary to relieve pressure on the overlying skin and prevent necrosis. Young patients with unstable, high velocity, or proximal injuries will usually require surgical repair, often using a compression plate. Elderly patients, even with potentially unstable injuries, usually fare better with attempts at conservative management as their thin bone does not hold metalwork well. It is important to consider the patient’s overall health and any other medical conditions when deciding on the best course of treatment.
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This question is part of the following fields:
- Musculoskeletal
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Question 22
Incorrect
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A 65-year-old male comes to the clinic complaining of intense lower back pain that extends down one of his legs. Despite having a manual job, he denies any history of injury. During the examination, it is noted that he has diminished perianal sensation and anal tone.
What would be considered a late sign in this patient's diagnosis, indicating possible irreversible damage?Your Answer: Reduced perianal sensation
Correct Answer: Urinary incontinence
Explanation:Cauda equina syndrome typically manifests as lower back pain, sciatica, and decreased sensation in the perianal area. As the condition progresses, urinary incontinence may develop, which is a concerning late sign associated with irreversible damage. While a positive sciatic stretch test indicates nerve irritation or compression, it does not necessarily indicate spinal cord compression. Reduced perianal sensation is also a red flag, but it typically appears earlier than urinary incontinence. Although tingling in one leg may be caused by sciatic nerve irritation, it is not a specific sign of cauda equina syndrome, particularly if it is unilateral. While assessing anal tone is important, studies have shown that it has low sensitivity and specificity for detecting cauda equina syndrome.
Cauda equina syndrome (CES) is a rare but serious condition that occurs when the nerve roots in the lower back are compressed. It is crucial to consider CES in patients who present with new or worsening lower back pain, as a late diagnosis can result in permanent nerve damage and long-term leg weakness and urinary/bowel incontinence. The most common cause of CES is a central disc prolapse, typically at L4/5 or L5/S1, but it can also be caused by tumors, infections, trauma, or hematomas. CES can present in various ways, and there is no single symptom or sign that can diagnose or exclude it. Possible features include low back pain, bilateral sciatica, reduced sensation in the perianal area, decreased anal tone, and urinary dysfunction. Urgent MRI is necessary for diagnosis, and surgical decompression is the recommended management.
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This question is part of the following fields:
- Musculoskeletal
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Question 23
Correct
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During a routine examination for private medical insurance, a 30-year-old female with a history of Ehler-Danlos syndrome presents with widespread bruising and a faint diastolic murmur on chest auscultation. What is the most likely complication of Ehler-Danlos that she is experiencing?
Your Answer: Aortic regurgitation
Explanation:Aortic regurgitation is a cardiac complication that can arise from Ehler-Danlos syndrome.
Ehler-Danlos syndrome is a genetic disorder that affects collagen, leading to increased tissue elasticity. The condition has various subtypes, but type III collagen is typically affected in most cases, and it is inherited in an autosomal dominant manner.
When a diastolic murmur is present, the most probable causes are mitral stenosis and aortic regurgitation. Individuals with Ehler-Danlos syndrome are more likely to experience valvular incompetence due to the connective tissue abnormalities. Although aortic dissection is another potential complication of Ehler-Danlos, it is unlikely to manifest in this manner.
Atrial and ventricular septal defects are not commonly linked to Ehler-Danlos syndrome.
Ehler-Danlos syndrome is a genetic disorder that affects the connective tissue, specifically type III collagen. This causes the tissue to be more elastic than usual, resulting in increased skin elasticity and joint hypermobility. Common symptoms include fragile and easily bruised skin, as well as recurrent joint dislocations. Additionally, individuals with Ehler-Danlos syndrome may be at risk for serious complications such as aortic regurgitation, mitral valve prolapse, aortic dissection, subarachnoid hemorrhage, and angioid retinal streaks.
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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 25-year-old male is being evaluated by his GP due to gradually worsening lower back pain. The pain is more severe in the morning and after prolonged periods of inactivity. He has also experienced increasing fatigue over the past 6 months. The GP prescribed regular NSAIDs, which resulted in significant symptom improvement. An x-ray of the lumbar spine was conducted, revealing indications of ankylosing spondylitis.
What is the most probable finding on the patient's x-ray?Your Answer: Vertebral body wedging
Correct Answer: Subchondral erosions
Explanation:Ankylosing spondylitis can be identified through x-ray findings such as subchondral erosions, which are typically seen in the corners of vertebral bodies and on the iliac side of the sacroiliac joint. This is usually preceded by subchondral sclerosis, which can lead to squaring of the lumbar vertebrae and a characteristic bamboo spine appearance. It is important to note that juxta-articular osteoporosis, loss of vertebral height, and osteopenia are not typical x-ray findings for ankylosing spondylitis.
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 25
Incorrect
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A 25-year-old male presents to the clinic with ongoing lower back pain. He reports that his pain seems to improve with physical activity, despite his demanding job in construction. Additionally, he has been experiencing discomfort in both hands and knees. During the examination, you observe restricted movement in his lumbar spine and decide to order X-rays of his spine, hands, and knees. What are the most probable findings you expect to see?
Your Answer: Rounding of the lumbar vertebrae
Correct Answer: Subchondral sclerosis of the sacroiliac joint
Explanation:The x-ray findings suggest that the patient is suffering from ankylosing spondylitis, a type of seronegative spondyloarthropathy that causes fusion of the spine and sacroiliac joints. The x-ray of the sacroiliac joints shows subchondral sclerosis and erosions, while the x-ray of the spine may reveal a ‘bamboo spine’ appearance and squaring of lumbar vertebrae. Therefore, the correct answer is ‘subchondral sclerosis of the sacroiliac joint’. It is important to note that chondrocalcinosis at the patellofemoral joint is a classic finding in pseudogout, while pencil-in-cup deformity is a classic finding in psoriatic arthropathy and rheumatoid arthritis. Additionally, ‘squaring’ rather than ’rounding’ of the lumbar vertebrae is seen in ankylosing spondylitis on lumbar x-rays, and subchondral sclerosis is a common feature at the patellofemoral joint in osteoarthritis.
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 26
Correct
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You review the results of a DEXA scan for a 70-year-old man who was referred due to a family history of femoral fracture. His past medical history includes type 2 diabetes, for which he takes metformin. He is a former smoker, quit 10 years ago, drinks 5 units of alcohol per week and follows a vegetarian diet. His T-score is -2.5. Blood results are shown below.
Hb 140g/L 120-160g/L
WCC 7.0x109/l 4.0-11x109/l
Na+ 138 mmol/L 135-145 mmol/L
K+ 4.2mmol/L 3.5-5.0mmol/L
Ca2+ 2.3mmol/L 2.2-2.6mmol/L (adjusted)
Vitamin D 60 nmol/L >50 nmol/L
What is the most appropriate action?Your Answer: Alendronate
Explanation:The recommended prescription for this patient with osteoporosis is bisphosphonate therapy, specifically alendronate or risedronate. Before starting treatment, it is important to ensure that calcium and vitamin D levels are replete, but supplementation should only be prescribed if dietary intake is inadequate or if there is a risk of vitamin D deficiency due to lack of sunlight exposure. Continuous combined hormone replacement therapy is not recommended for older postmenopausal women with osteoporosis, as the risk vs benefit ratio is unfavourable.
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 27
Correct
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A 28-year-old male visits the GP clinic complaining of lower back pain that radiates to his buttocks for the past 5 months. The pain is most severe in the morning, improves with exercise, and sometimes wakes him up in the early hours of the morning. A radiograph is requested, which reveals sacroiliitis. What other radiograph findings are probable in this patient?
Your Answer: Subchondral erosions, sclerosis and squaring of lumbar vertebrae
Explanation:The x-ray findings that are commonly seen in ankylosing spondylitis include subchondral erosions, sclerosis, and squaring of lumbar vertebrae. These findings are indicative of the patient’s symptoms of inflammatory joint pain, which is most likely caused by ankylosing spondylitis given their age, gender, and nature of pain. Sacroiliitis on x-ray can confirm the diagnosis of ankylosing spondylitis.
Juxta-articular osteopenia, subchondral cysts, and squaring of lumbar vertebrae are incorrect as they are not commonly seen in ankylosing spondylitis. Juxta-articular osteopenia is more commonly associated with rheumatoid arthritis, while subchondral cysts and osteophyte formation at joint margins are more common in osteoarthritis.
Subchondral sclerosis and osteophyte formation at joint margins are also incorrect as they are more commonly seen in osteoarthritis. Periarticular erosions are more commonly associated with rheumatoid arthritis and are therefore unlikely to be seen on this patient’s x-ray.
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 28
Incorrect
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A 27-year-old man comes to the GP clinic complaining of new onset of low back pain. The pain is more severe at night and frequently spreads to his hips. It gets better with physical activity. He is also experiencing light sensitivity in both eyes and decreased vision in his left eye. Despite taking oral NSAIDs, his symptoms have not improved. What would be the most suitable medication for the next stage of treatment?
Your Answer: Methotrexate
Correct Answer: Etanercept
Explanation:Ankylosing spondylitis (AS) is a condition that can cause acute iritis in approximately one-third of patients. This man is displaying typical symptoms of AS and is also experiencing acute iritis. Since oral NSAIDs have not been effective, the next course of action would be to consider TNF-alpha blockers like infliximab and etanercept. DMARDs such as methotrexate and leflunomide have not been found to be helpful in treating AS. While capsaicin may be useful for osteoarthritis, it is not indicated for AS.
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 29
Incorrect
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A 68-year-old male comes to the clinic after tripping while walking his dog. He stumbled forward but managed to catch himself with his hands. He did not experience any head trauma or loss of consciousness.
Upon examination, he reports persistent discomfort in his left hand, and the pain intensifies when pressure is applied through the metacarpal of his thumb.
An X-ray shows an unsteady fracture in the proximal pole of a carpal bone.
What would be the most suitable course of action for managing this condition?Your Answer: Repeat wrist X-ray in 10 days time
Correct Answer: Refer to orthopaedic surgery
Explanation:Surgical fixation is necessary for all proximal scaphoid pole fractures, including this patient’s unstable fracture. The positive scaphoid compression test indicates instability, and the retrograde blood supply increases the risk of avascular necrosis. Rest, ice, compression, and elevation are not sufficient treatments in this case. While a long-arm thumb spica cast may be helpful for waist scaphoid fractures, it is less effective for unstable scaphoid pole fractures. Repeating a wrist x-ray after 10 days is appropriate when radiological signs are absent but clinical suspicion remains high. Attempting manual reduction is not recommended for scaphoid fractures, which require surgical fixation for optimal healing.
Understanding Scaphoid Fractures
A scaphoid fracture is a type of wrist fracture that typically occurs when a person falls onto an outstretched hand or during contact sports. It is important to recognize this type of fracture due to the unusual blood supply of the scaphoid bone. Interruption of the blood supply can lead to avascular necrosis, which is a serious complication. Patients with scaphoid fractures typically present with pain along the radial aspect of the wrist and loss of grip or pinch strength. Clinical examination is highly sensitive and specific when certain signs are present, such as tenderness over the anatomical snuffbox and pain on telescoping of the thumb.
Plain film radiographs should be requested, including scaphoid views, but the sensitivity in the first week of injury is only 80%. A CT scan may be requested in the context of ongoing clinical suspicion or planning operative management, while MRI is considered the definite investigation to confirm or exclude a diagnosis. Initial management involves immobilization with a splint or backslab and referral to orthopaedics. Orthopaedic management depends on the patient and type of fracture, with undisplaced fractures of the scaphoid waist typically treated with a cast for 6-8 weeks. Displaced scaphoid waist fractures require surgical fixation, as do proximal scaphoid pole fractures. Complications of scaphoid fractures include non-union, which can lead to pain and early osteoarthritis, and avascular necrosis.
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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 63-year-old woman presents to her GP with a headache that started a week ago and is different from her usual headaches. She also reports experiencing jaw pain while eating, which has been ongoing for the past week. The GP suspects giant cell arthritis and initiates high-dose prednisolone treatment while referring her to ambulatory emergency care for specialist evaluation. The patient expresses concern about the potential impact of high-dose steroids on her bone health.
What is the best course of action for managing this patient's condition?Your Answer: Start vitamin D and calcium supplements
Correct Answer: Start alendronic acid, vitamin D and calcium supplements
Explanation:Immediate bone protection should be provided to patients who are going to undergo long-term steroid treatment, especially if they are over 65 years old. In the case of this patient with giant cell arthritis, high dose prednisolone is required and therefore, immediate bone protection with alendronic acid is necessary. However, if the patient was under 65 years old, a bone density scan would be required to determine the need for bone protection medication. Merely reassuring the patient would not suffice as long-term steroid use can lead to osteoporosis, which is a significant concern for patients over 65 years old. Additionally, vitamin D and calcium supplements should be started along with bone protection medication. It is important to note that NSAIDs are not a suitable alternative to steroids for treating giant cell arthritis.
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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