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Question 1
Incorrect
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A 25-year-old woman presents to her General Practitioner with a complaint of difficulty sleeping due to a blocked nose at night. She uses inhalers regularly for wheezing during cold weather and experiences a cough at night. What is the most common complication of her underlying diagnosis that she may be experiencing?
Your Answer: Allergic fungal sinusitis
Correct Answer: Nasal Polyps
Explanation:Understanding Nasal Polyps and Associated Conditions
Nasal polyps are a common condition that can cause a blocked nose, interrupting sleep and wheezing upon exertion. They are often associated with asthma, which is found along the atopic spectrum of diseases. Other conditions commonly associated with nasal polyps include allergic rhinitis and sinusitis.
Allergic fungal sinusitis is another condition that can cause nasal polyps, but it is more commonly found in warmer climates and is not the most common cause in the United Kingdom. Paracetamol sensitivity is not associated with nasal polyps, but aspirin sensitivity is and can be part of Samter’s triad if the patient also has asthma.
Chronic obstructive pulmonary disease (COPD) is not associated with nasal polyps, and it would be rare to see in a young patient unless there was underlying alpha-1 anti-trypsin disease. COPD is most commonly seen in long-term smokers and presents with symptoms such as shortness of breath and a longstanding cough.
Diabetes mellitus is not associated with nasal polyps and would present with other symptoms such as polyuria, polydipsia, and fatigue. Understanding the conditions associated with nasal polyps can help with diagnosis and treatment.
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This question is part of the following fields:
- ENT
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Question 2
Incorrect
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A 15-year-old girl comes to the emergency department complaining of a maculopapular rash that has been present for 1 day. She had visited her family doctor 2 days ago with symptoms of a cold and a sore throat and was given a course of oral antibiotics. Upon examination, she has a mild fever of 37.8ºC and a widespread maculopapular rash on her face and torso. Her tonsils are enlarged and erythematous, and she has palpable tender posterior cervical lymphadenopathy. What is the most appropriate diagnostic test to identify the underlying condition?
Your Answer: Nasopharyngeal aspirate for viral polymerase chain reaction (PCR)
Correct Answer: Monospot test
Explanation:The patient in question is likely suffering from glandular fever, a viral illness caused by the Ebstein-Barr virus. Symptoms include a sore throat, fever, and general malaise, as well as palpable cervical lymphadenopathy and an erythematous throat. The illness is more common in teenagers and is often spread through respiratory droplets, earning it the nickname kissing disease. The patient was prescribed amoxicillin by their GP, which can cause a non-specific maculopapular rash in patients with glandular fever. The diagnosis is typically confirmed through a Monospot blood test, which detects the presence of heterophil antibodies produced in response to the virus.
An anti-streptolysin O titre test can detect streptococcal infections, but it does not explain the patient’s rash following antibiotic use. A full blood count can be helpful in diagnosing glandular fever, as it often shows a lymphocytosis, but the Monospot test is more definitive. A nasopharyngeal aspirate for viral PCR can diagnose viral infections like measles, but this is less likely in a teenager in the UK due to vaccination. A sputum culture is not useful in diagnosing glandular fever, as the patient does not have a cough or sputum production.
Understanding Infectious Mononucleosis
Infectious mononucleosis, also known as glandular fever, is a viral infection caused by the Epstein-Barr virus (EBV) in 90% of cases. It is most commonly seen in adolescents and young adults. The classic triad of symptoms includes sore throat, pyrexia, and lymphadenopathy, which are present in around 98% of patients. Other symptoms include malaise, anorexia, headache, palatal petechiae, splenomegaly, hepatitis, lymphocytosis, haemolytic anaemia, and a maculopapular rash. The symptoms typically resolve after 2-4 weeks.
The diagnosis of infectious mononucleosis is confirmed through a heterophil antibody test (Monospot test) in the second week of the illness. Management is supportive and includes rest, drinking plenty of fluids, avoiding alcohol, and taking simple analgesia for any aches or pains. It is recommended to avoid playing contact sports for 4 weeks after having glandular fever to reduce the risk of splenic rupture.
Interestingly, there is a correlation between EBV and socioeconomic groups. Lower socioeconomic groups have high rates of EBV seropositivity, having frequently acquired EBV in early childhood when the primary infection is often subclinical. However, higher socioeconomic groups show a higher incidence of infectious mononucleosis, as acquiring EBV in adolescence or early adulthood results in symptomatic disease.
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This question is part of the following fields:
- Infectious Diseases
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Question 3
Incorrect
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Which of the following statements is true for prostate cancer?
Your Answer:
Correct Answer: There is currently no screening programme for prostate cancer in the UK.
Explanation:Prostate Cancer: Facts and Controversies
Prostate cancer is the second most common cancer in men in developed countries, with an estimated one in six men being diagnosed with it in their lifetime. However, there is currently no screening programme for prostate cancer in the UK due to the controversial nature of PSA testing. PSA tests can yield unreliable results and may lead to unnecessary treatment for slow-growing tumours that may never cause symptoms or shorten life. Although treating prostate cancer in its early stages can be beneficial, the potential side effects of treatment may cause men to delay treatment until it is absolutely necessary.
The 5-year relative survival rates for prostate cancer vary depending on the stage of the cancer at diagnosis, with local or regional prostate cancer having a survival rate of over 99%, while distant disease has a survival rate of 29%. The Gleason grade, tumour volume, and presence of capsular penetration or margin positivity are important indicators of prognosis for prostate cancer.
Prostate cancer is also the second most common cause of cancer death in men, accounting for 8% of cancer deaths. Advanced prostate cancer may not involve pain, but can result in a range of symptoms including weight loss, anorexia, bone pain, neurological deficits, and lower extremity pain and oedema.
Overall, prostate cancer remains a complex and controversial disease, with ongoing debates surrounding screening and treatment options.
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This question is part of the following fields:
- Renal Medicine/Urology
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Question 4
Incorrect
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A 28-year-old presents with profuse epistaxis (nose bleed) after being hit in the nose during a boxing match. The bleeding stops after applying direct pressure and packing the nose. Which vascular territory is most likely to have been impacted?
Your Answer:
Correct Answer: Kiesselbach’s plexus
Explanation:Understanding Epistaxis: Causes and Management
Epistaxis, or nosebleed, can occur from two areas: the anterior bleed from the Kiesselbach’s plexus and the posterior bleed from the sphenopalatine artery. The former is usually caused by trauma, involving the anterior and posterior ethmoid arteries, superior labial artery, and greater palatine artery. On the other hand, the latter is triggered by underlying pathologies such as hypertension or old age.
To manage epistaxis, direct pressure to the bleeding point, packing of the nose, or surgical ligation or selective embolization of the relevant artery may be necessary. It is important to note that significant episodes of epistaxis may lead to a considerable amount of blood loss, especially in the elderly, which can be masked by ingestion of the blood into the digestive tract. Thus, clotting and hemoglobin levels should always be checked.
It is worth noting that the nasal artery is not involved in epistaxis, as it is a terminal branch of the ophthalmic artery emerging from the orbit. Similarly, the superficial temporal artery and zygomatic artery have no involvement in epistaxis. The former is a major artery of the head arising from the internal carotid and passing anterior to the pinna, while the latter runs across the top of the zygomatic arch.
In summary, understanding the causes and management of epistaxis is crucial in preventing significant blood loss and ensuring proper treatment.
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This question is part of the following fields:
- ENT
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Question 5
Incorrect
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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:
Correct 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 6
Incorrect
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A 25-year-old male comes to the neurology department with complaints of weakness. He initially experienced weakness in his legs a few days ago, which has now progressed to involve his arms. Additionally, he is experiencing shooting pains in his back and limbs. About four weeks ago, he had a brief episode of vomiting and diarrhea. Upon examination, reduced tendon reflexes and weakness are confirmed.
What test results would you anticipate for this patient?Your Answer:
Correct Answer: Abnormal nerve conduction studies
Explanation:Guillain-Barre syndrome can be diagnosed with the help of nerve conduction studies. The presence of ascending weakness after an infection is a common symptom of this syndrome. Most patients with Guillain-Barre syndrome show abnormal nerve conduction study results. If there are cord signal changes, it may indicate spinal cord compression or a spinal lesion. Inflammatory infiltrates on muscle biopsy are typically observed in patients with myositis. Myasthenia gravis is characterized by the presence of anti-acetylcholine receptor antibodies. In Guillain-Barre syndrome, the CSF protein level is usually elevated, not decreased.
Understanding Guillain-Barre Syndrome: Symptoms and Features
Guillain-Barre syndrome is a condition that affects the peripheral nervous system and is caused by an immune-mediated demyelination. It is often triggered by an infection, with Campylobacter jejuni being a common culprit. The initial symptoms of the illness include back and leg pain, which is experienced by around 65% of patients. The characteristic feature of Guillain-Barre syndrome is a progressive, symmetrical weakness of all the limbs, with the weakness typically starting in the legs and ascending upwards. Reflexes are reduced or absent, and sensory symptoms tend to be mild, with very few sensory signs.
Other features of Guillain-Barre syndrome may include a history of gastroenteritis, respiratory muscle weakness, cranial nerve involvement, diplopia, bilateral facial nerve palsy, oropharyngeal weakness, and autonomic involvement. Autonomic involvement may manifest as urinary retention or diarrhea. Less common findings may include papilloedema, which is thought to be secondary to reduced CSF resorption.
To diagnose Guillain-Barre syndrome, a lumbar puncture may be performed, which can reveal a rise in protein with a normal white blood cell count (albuminocytologic dissociation) in 66% of cases. Nerve conduction studies may also be conducted, which can show decreased motor nerve conduction velocity due to demyelination, prolonged distal motor latency, and increased F wave latency. Understanding the symptoms and features of Guillain-Barre syndrome is crucial for prompt diagnosis and treatment.
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This question is part of the following fields:
- Neurology
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Question 7
Incorrect
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A 28-year-old woman presents to her GP with a range of symptoms that have been progressively worsening over the past 6 months. Despite no changes in her diet, she has gained over 3 stone of weight, with a concentration on her face and neck. She has also noticed stretch marks on her abdomen and excessive hair growth on her body and face. Upon referral to an endocrinologist, she is diagnosed with a pituitary adenoma causing an increased secretion of adrenocorticotropic hormone.
What is the best description of this condition?Your Answer:
Correct Answer: Cushing's disease
Explanation:The patient is experiencing Cushing’s disease, which is caused by excessive secretion of adrenocorticotropic hormone (ACTH) from the anterior pituitary gland, often due to a pituitary adenoma. Addison’s disease and acromegaly can be ruled out based on the patient’s symptoms. It is important to differentiate between Cushing’s triad, which includes irregular breathing, bradycardia, and systolic hypertension caused by increased intracranial pressure, and Cushing’s syndrome, a collection of symptoms resulting from prolonged exposure to cortisol. Cushing’s disease is a specific type of Cushing’s syndrome characterized by increased ACTH production due to a pituitary adenoma or excess production of hypothalamus CRH.
Understanding the Causes of Cushing’s Syndrome
Cushing’s syndrome is a condition that occurs when the body is exposed to high levels of cortisol for an extended period. While exogenous causes of Cushing’s syndrome, such as glucocorticoid therapy, are more common, endogenous causes can also occur. The causes of Cushing’s syndrome can be divided into two categories: ACTH dependent and ACTH independent.
ACTH dependent causes of Cushing’s syndrome include Cushing’s disease, which is caused by a pituitary tumor secreting ACTH and producing adrenal hyperplasia. Ectopic ACTH production, which is caused by small cell lung cancer, is another ACTH dependent cause. On the other hand, ACTH independent causes of Cushing’s syndrome include iatrogenic causes such as steroid use, adrenal adenoma, adrenal carcinoma, Carney complex, and micronodular adrenal dysplasia.
In addition to these causes, there is also a condition called Pseudo-Cushing’s, which mimics Cushing’s syndrome. This condition is often caused by alcohol excess or severe depression and can cause false positive dexamethasone suppression tests or 24-hour urinary free cortisol tests. To differentiate between Cushing’s syndrome and Pseudo-Cushing’s, an insulin stress test may be used. Understanding the causes of Cushing’s syndrome is crucial in diagnosing and treating this condition.
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This question is part of the following fields:
- Endocrinology/Metabolic Disease
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Question 8
Incorrect
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A 50-year-old man presents to the emergency department with a 24-hour history of worsening right knee pain and limited mobility. He reports falling off his bike a few days ago but did not experience any knee pain until yesterday. Upon examination, the right knee appears red and hot with only 20º of flexion and a small effusion. The patient has a history of a conservatively treated ACL rupture in the other knee.
The patient's vital signs are as follows: heart rate 100 beats/min, respiratory rate 18/min, saturations 98% on room air, blood pressure 102/67 mmHg, and temperature 37.9ºC. Blood tests reveal a hemoglobin level of 145 g/L, platelets of 500 * 109/L, a white cell count of 13.6 * 109/L, a sodium level of 142 mmol/L, a potassium level of 5.0 mmol/L, a urea level of 4.0 mmol/L, a creatinine level of 110 µmol/L, and a CRP level of 130 mg/L. X-ray results show no obvious bony injury.
What is the most appropriate next step in managing this patient?Your Answer:
Correct Answer: Urgent orthopaedic review
Explanation:Septic arthritis is most commonly observed in adults’ knees, which presents as sudden joint pain and immobility, accompanied by fever and elevated inflammatory markers. Urgent orthopaedic evaluation is necessary for aspiration and potential washout, as untreated septic arthritis can lead to joint destruction within hours to days. Discharging the patient with oral antibiotics or physiotherapy is not recommended. Administering colchicine is not appropriate as there is no history of gout or pseudogout, and X-ray results do not indicate chondrocalcinosis. Ordering an MRI knee scan may delay appropriate treatment and will not impact management.
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 9
Incorrect
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A 35-year-old woman is concerned about her risk of developing ovarian cancer due to a family history of the disease. She wants to learn more about screening options available in the UK.
Which of the following statements is correct?Your Answer:
Correct Answer: There is currently no screening programme for ovarian cancer
Explanation:Currently, there is no dependable screening test for detecting ovarian cancer in its early stages. However, women, especially those over 50 years old, who experience persistent symptoms such as abdominal bloating, early satiety, loss of appetite, pelvic or abdominal pain, and increased urinary urgency or frequency should be suspected of having ovarian cancer and should undergo further tests.
Ovarian cancer is a common malignancy in women, ranking fifth in frequency. It is most commonly diagnosed in women over the age of 60 and has a poor prognosis due to late detection. The majority of ovarian cancers, around 90%, are of epithelial origin, with serous carcinomas accounting for 70-80% of cases. Interestingly, recent research suggests that many ovarian cancers may actually originate in the distal end of the fallopian tube. Risk factors for ovarian cancer include a family history of BRCA1 or BRCA2 gene mutations, early menarche, late menopause, and nulliparity.
Clinical features of ovarian cancer are often vague and can include abdominal distension and bloating, abdominal and pelvic pain, urinary symptoms such as urgency, early satiety, and diarrhea. The initial diagnostic test recommended by NICE is a CA125 blood test, although this can also be elevated in other conditions such as endometriosis and benign ovarian cysts. If the CA125 level is raised, an urgent ultrasound scan of the abdomen and pelvis should be ordered. However, a CA125 test should not be used for screening asymptomatic women. Diagnosis of ovarian cancer is difficult and usually requires a diagnostic laparotomy.
Management of ovarian cancer typically involves a combination of surgery and platinum-based chemotherapy. Unfortunately, 80% of women have advanced disease at the time of diagnosis, leading to a 5-year survival rate of only 46%. It was previously thought that infertility treatment increased the risk of ovarian cancer due to increased ovulation, but recent evidence suggests that this is not a significant factor. In fact, the combined oral contraceptive pill and multiple pregnancies have been shown to reduce the risk of ovarian cancer by reducing the number of ovulations.
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This question is part of the following fields:
- Reproductive Medicine
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Question 10
Incorrect
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A 55-year-old woman with a history of diabetes, obesity, and smoking developed sudden pain in her left foot with a dusky colour change. On examination, in the Emergency Department, she had a cold, blue, painful foot with an absent dorsalis pedis and posterior tibial pulse.
Which of the following will be the most appropriate investigation for this patient?Your Answer:
Correct Answer: Lower limb angiography
Explanation:Diagnostic Tests for Lower Limb Ischaemia
Lower limb ischaemia is a medical emergency that requires prompt diagnosis and treatment. Several diagnostic tests can be used to determine the cause and severity of the condition. Here are some of the most common tests:
1. Lower limb angiography: This test can identify the site of arterial occlusion and help plan the appropriate treatment, such as embolectomy or fasciotomy.
2. Focused assessment with sonography for trauma (FAST) scan of the abdomen: This test is useful in cases of trauma or suspected abdominal aortic aneurysm rupture.
3. Ankle-brachial pressure index (ABPI): This quick and easy test can provide an early indication of the severity of ischaemia. A value of 0.9-1.2 is considered normal, while values below 0.3 indicate critical ischaemia.
4. Echocardiogram: This test can rule out a cardiac source of embolisation, but lower limb angiography is the priority in cases of acute ischaemia.
5. Lower limb Doppler: This test can be used to assess arterial or venous flow, depending on the suspected cause of ischaemia.In summary, a combination of these diagnostic tests can help diagnose and treat lower limb ischaemia effectively.
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This question is part of the following fields:
- Cardiovascular
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Question 11
Incorrect
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You are a junior doctor working in pediatrics. You are preparing cases for the morbidity and mortality meeting. What is the time frame that defines infant mortality?
Your Answer:
Correct Answer: Any death in pregnancy, labour or in the six weeks post partum
Explanation:The investigation of maternal deaths in the UK is carried out by the Confidential Enquiry into Maternal Deaths, which encompasses deaths occurring during pregnancy, labour, and up to six weeks after delivery. Post partum haemorrhage (PPH) is a leading cause of maternal mortality. A stillbirth is defined as the loss of a fetus after twenty weeks gestation, while any loss prior to this is classified as a miscarriage.
Perinatal Death Rates and Related Metrics
Perinatal mortality rate is a measure of stillbirths and early neonatal deaths within seven days per 1,000 births after 24 weeks of gestation. In the UK, this rate is around 6 per 1,000 births. This figure is usually broken down into 4 per 1,000 stillbirths and 2 per 1,000 early neonatal deaths.
Maternal mortality rate, on the other hand, is calculated by dividing the number of deaths during pregnancy, labor, and six weeks after delivery by the total number of maternities and multiplying the result by 1000. Meanwhile, the stillbirth rate is determined by dividing the number of babies born dead after 24 weeks by the total number of births (live and stillborn) and multiplying the result by 1000. Lastly, the neonatal death rate is computed by dividing the number of babies who died between 0-28 days by the total number of live births and multiplying the result by 1000.
These metrics are important in assessing the quality of perinatal care and identifying areas for improvement. By monitoring these rates, healthcare providers can work towards reducing perinatal deaths and improving maternal and neonatal outcomes.
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This question is part of the following fields:
- Paediatrics
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Question 12
Incorrect
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A 62-year-old man presents to the Ophthalmology Clinic with elevated intraocular pressure and peripheral vision loss. He also has a history of asthma. What is the most suitable course of treatment to begin in this scenario?
Your Answer:
Correct Answer: Latanoprost
Explanation:Medications for Glaucoma: Uses and Contraindications
Glaucoma is a condition that can lead to vision loss if left untreated. The primary goal of treatment is to lower intraocular pressure. Here are some common medications used for glaucoma and their uses and contraindications:
1. Latanoprost: This prostaglandin analogue increases scleral permeability to aqueous fluid, reducing intraocular pressure. It is safe to use in asthmatics and is recommended as a first-line medication.
2. Brinzolamide: This carbonic anhydrase inhibitor also lowers intraocular pressure but is not a first-line medication for glaucoma. It is safe to use in those with concurrent asthma.
3. Pilocarpine: This muscarinic receptor agonist improves the flow rate of aqueous humour but is not a first-line medication. It is cautioned against use in asthmatics as it can increase bronchial secretions and airway resistance.
4. Sodium cromoglicate: This mast-cell stabiliser is not usually used in glaucoma but is commonly used in conditions such as allergic rhinitis.
5. Timolol: This beta-receptor antagonist is contraindicated in asthmatics as it can lead to increased airway resistance through bronchospasm.
It is important to consult with a healthcare provider to determine the best medication for individual cases of glaucoma, taking into consideration any contraindications or potential side effects.
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This question is part of the following fields:
- Ophthalmology
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Question 13
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:
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 14
Incorrect
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A 30-year-old female patient visits the GP clinic with a tiny lump in her right breast. Upon examination, a smooth fluctuant lump is found in the right upper quadrant of the breast. The patient is referred to the breast clinic for an ultrasound scan, which reveals a 2cm cyst in the right upper quadrant of the breast. What is the most suitable course of action for management?
Your Answer:
Correct Answer: Aspiration of the cyst
Explanation:Aspirating breast cysts is necessary due to the potential risk of breast cancer, particularly in younger women. Merely monitoring the cysts with ultrasound or mammogram without aspiration is not a suitable approach. There is no need for wide local excision at this point. Providing false reassurance to the patient is not advisable.
Benign breast lesions have different features and treatments. Fibroadenomas are firm, mobile lumps that develop from a whole lobule and usually do not increase the risk of malignancy. Breast cysts are smooth, discrete lumps that may be aspirated, but blood-stained or persistently refilling cysts should be biopsied or excised. Sclerosing adenosis, radial scars, and complex sclerosing lesions cause mammographic changes that may mimic carcinoma, but do not increase the risk of malignancy. Epithelial hyperplasia may present as general lumpiness or a discrete lump, and atypical features and family history of breast cancer increase the risk of malignancy. Fat necrosis may mimic carcinoma and requires imaging and core biopsy. Duct papillomas usually present with nipple discharge and may require microdochectomy.
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This question is part of the following fields:
- Haematology/Oncology
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Question 15
Incorrect
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A 67-year-old male experiences a cardiac arrest during coronary angiography in the catheter laboratory. His heart rate is 164 beats per minute and the 12-lead ECG monitor displays ventricular tachycardia. As you begin to assess him, you are unable to detect a pulse and immediately call for assistance.
What is the next appropriate step to take?Your Answer:
Correct Answer: Deliver a maximum of three successive shocks
Explanation:If a patient experiences cardiac arrest in VF/pulseless VT and is monitored, such as in a coronary care unit, critical care unit, or catheter laboratory, they should receive a maximum of three successive shocks instead of one shock followed by two minutes of CPR. After the shocks, chest compressions should be administered for two minutes. Once compressions restart, adrenaline 1mg IV and amiodarone 300 mg IV should be given for shockable rhythms (VT/pulseless VF). Adrenaline 1mg IV should be given after alternate shocks (every 3-5 minutes). For non-shockable rhythms (pulseless electrical activity/asystole), adrenaline 1mg IV should be given as soon as venous access is achieved and administered alongside CPR. Pulseless electrical activity is a type of cardiac arrest where there is electrical activity (other than ventricular tachycardia) that would normally have an associated pulse. Asystole is a complete cessation of any electrical and mechanical heart activity.
The 2015 Resus Council guidelines for adult advanced life support outline the steps to be taken when dealing with patients with shockable and non-shockable rhythms. For both types of patients, chest compressions are a crucial part of the process, with a ratio of 30 compressions to 2 ventilations. Defibrillation is recommended for shockable rhythms, with a single shock for VF/pulseless VT followed by 2 minutes of CPR. Adrenaline and amiodarone are the drugs of choice for non-shockable rhythms, with adrenaline given as soon as possible and amiodarone administered after 3 shocks for VF/pulseless VT. Thrombolytic drugs should be considered if a pulmonary embolus is suspected. Atropine is no longer recommended for routine use in asystole or PEA. Oxygen should be titrated to achieve saturations of 94-98% following successful resuscitation. The Hs and Ts should be considered as potential reversible causes of cardiac arrest.
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This question is part of the following fields:
- Cardiovascular
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Question 16
Incorrect
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A 5-day-old infant presents with congenital cataracts, sensorineural deafness, and pulmonary artery stenosis. What is the probable prenatal infection that the baby has been exposed to?
Your Answer:
Correct Answer: Rubella
Explanation:The neonate is diagnosed with congenital rubella syndrome, which is characterized by sensorineural deafness, eye abnormalities, and congenital heart disease. The risk of fetal infection is highest if the mother contracts the virus during the first trimester of pregnancy. Antenatal cytomegalovirus infection can lead to cerebral calcification, microcephaly, and sensorineural deafness. HIV does not pose a physical risk to the developing fetus, but there is a risk of perinatal transmission. Parvovirus B19 can cause hydrops fetalis and fetal death. Toxoplasmosis can result in intracranial calcification, hydrocephalus, and epilepsy in the affected child.
Rubella and Pregnancy: Risks, Features, Diagnosis, and Management
Rubella, also known as German measles, is a viral infection caused by the togavirus. Thanks to the introduction of the MMR vaccine, it is now rare. However, if contracted during pregnancy, there is a risk of congenital rubella syndrome, which can cause serious harm to the fetus. It is important to note that the incubation period is 14-21 days, and individuals are infectious from 7 days before symptoms appear to 4 days after the onset of the rash.
The risk of damage to the fetus is highest in the first 8-10 weeks of pregnancy, with a risk as high as 90%. However, damage is rare after 16 weeks. Features of congenital rubella syndrome include sensorineural deafness, congenital cataracts, congenital heart disease (e.g. patent ductus arteriosus), growth retardation, hepatosplenomegaly, purpuric skin lesions, ‘salt and pepper’ chorioretinitis, microphthalmia, and cerebral palsy.
If a suspected case of rubella in pregnancy arises, it should be discussed immediately with the local Health Protection Unit (HPU) as type/timing of investigations may vary. IgM antibodies are raised in women recently exposed to the virus. It should be noted that it is very difficult to distinguish rubella from parvovirus B19 clinically. Therefore, it is important to also check parvovirus B19 serology as there is a 30% risk of transplacental infection, with a 5-10% risk of fetal loss.
If a woman is tested at any point and no immunity is demonstrated, they should be advised to keep away from people who might have rubella. Non-immune mothers should be offered the MMR vaccination in the post-natal period. However, MMR vaccines should not be administered to women known to be pregnant or attempting to become pregnant.
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This question is part of the following fields:
- Infectious Diseases
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Question 17
Incorrect
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A 68-year-old complains of tingling and numbness in his left little and ring finger. He states that the pain used to be intermittent but is now persistent. The pain intensifies when he puts pressure on his elbow, and he remembers fracturing his elbow as a child. Based on the provided medical history, what is the probable cause of his symptoms?
Your Answer:
Correct Answer: Cubital tunnel syndrome
Explanation:Cubital tunnel syndrome results from the ulnar nerve being compressed, leading to tingling and numbness in the 4th and 5th fingers. This condition is often aggravated by leaning on the affected elbow and may be associated with osteoarthritis or prior injury. Medial epicondylitis causes pain in the medial elbow, not distal hand symptoms. Radial tunnel syndrome causes aching and paraesthesia in the hand and forearm distal to the lateral epicondyle. Carpal tunnel syndrome, on the other hand, is caused by compression of the median nerve and presents with pain and tingling in the thumb, index, middle, and medial half of the ring finger. De Quervain’s tenosynovitis typically affects the base of the thumb.
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 18
Incorrect
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A 26-year-old presents with a rash that developed after a camping trip. He mentions being bitten by a tick during the trip. He explains that the rash is red, not itchy, and began at the site of the bite before spreading outward. The center of the rash has now cleared, resulting in a bulls-eye appearance. What is the name of this rash?
Your Answer:
Correct Answer: Erythema migrans
Explanation:Lyme Disease: Symptoms and Progression
Lyme disease is a bacterial infection that is transmitted through the bite of an infected tick. The disease progresses in two stages, with early and later features. The early features of Lyme disease include erythema migrans, which is a small papule that often appears at the site of the tick bite. This papule develops into a larger annular lesion with central clearing, resembling a bulls-eye. This occurs in 70% of patients and is accompanied by systemic symptoms such as malaise, fever, and arthralgia.
In the later stages of Lyme disease, patients may experience cardiovascular symptoms such as heart block and myocarditis. Neurological symptoms may also occur, including cranial nerve palsies and meningitis. Additionally, patients may develop polyarthritis, which is inflammation in multiple joints. It is important to seek medical attention if any of these symptoms occur after a tick bite, as early treatment can prevent the progression of the disease.
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This question is part of the following fields:
- Dermatology
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Question 19
Incorrect
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At a practice meeting, you are discussing strategies to increase the rate of early cancer detection. Which of the following patients is most likely to need screening for hepatocellular carcinoma, given that they are 50 years old?
Your Answer:
Correct Answer: A 45-year-old man with liver cirrhosis secondary to hepatitis C
Explanation:Hepatocellular carcinoma (HCC) is a type of cancer that ranks as the third most common cause of cancer worldwide. The leading cause of HCC globally is chronic hepatitis B, while chronic hepatitis C is the most common cause in Europe. The primary risk factor for developing HCC is liver cirrhosis, which can result from various factors such as hepatitis B and C, alcohol, haemochromatosis, and primary biliary cirrhosis. Other risk factors include alpha-1 antitrypsin deficiency, hereditary tyrosinosis, glycogen storage disease, aflatoxin, certain drugs, porphyria cutanea tarda, male sex, diabetes mellitus, and metabolic syndrome.
HCC tends to present late, and patients may exhibit features of liver cirrhosis or failure such as jaundice, ascites, RUQ pain, hepatomegaly, pruritus, and splenomegaly. In some cases, decompensation may occur in patients with chronic liver disease. Raised AFP levels are also common. Screening with ultrasound and alpha-fetoprotein may be necessary for high-risk groups, including patients with liver cirrhosis secondary to hepatitis B and C or haemochromatosis, and men with liver cirrhosis secondary to alcohol.
Management options for early-stage HCC include surgical resection, liver transplantation, radiofrequency ablation, transarterial chemoembolisation, and sorafenib, a multikinase inhibitor. It is important to note that Wilson’s disease is an exception to the typical causes of liver cirrhosis and HCC.
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This question is part of the following fields:
- Gastroenterology/Nutrition
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Question 20
Incorrect
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A 27-year-old African American woman who is 28 weeks pregnant undergoes an oral glucose tolerance test (OGTT) due to her ethnicity and a history of being overweight. An ultrasound reveals that the fetus is measuring larger than expected for its gestational age. The results of the OGTT are as follows:
Time (hours) Blood glucose (mmol/l)
0 9.5
2 15.0
What would be the most suitable course of action?Your Answer:
Correct Answer: Start insulin
Explanation:Immediate initiation of insulin is recommended due to the high blood glucose levels and presence of macrosomia. Additionally, it is advisable to consider administering aspirin as there is an elevated risk of pre-eclampsia.
Gestational diabetes is a common medical disorder affecting around 4% of pregnancies. Risk factors include a high BMI, previous gestational diabetes, and family history of diabetes. Screening is done through an oral glucose tolerance test, and diagnostic thresholds have recently been updated. Management includes self-monitoring of blood glucose, diet and exercise advice, and medication if necessary. For pre-existing diabetes, weight loss and insulin are recommended, and tight glycemic control is important. Targets for self-monitoring include fasting glucose of 5.3 mmol/l and 1-2 hour post-meal glucose levels.
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This question is part of the following fields:
- Endocrinology/Metabolic Disease
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Question 21
Incorrect
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A 40-year-old woman presents to her General Practitioner for investigation as she and her male partner have not become pregnant after 24 months of trying to conceive. Her female partner has also had normal investigations and on examination, she has a small uncomplicated left-sided inguinal hernia. She takes fluoxetine for depression and occasionally uses acetaminophen for back pain but is not on any other medications. Her male partner's sperm count is normal.
What would be the next most appropriate step in managing this couple’s inability to conceive?Your Answer:
Correct Answer: Refer to secondary care fertility services
Explanation:Recommendations for a Couple Struggling with Infertility
When a couple is struggling to conceive, there are several recommendations that healthcare providers may suggest. Firstly, if the couple has been trying to conceive for a year without success, they should be referred to fertility services. However, if there is an underlying reason for conception difficulties, earlier investigation may be necessary. In cases where the male partner is taking non-steroidal anti-inflammatory drugs, there is no impact on his ability to conceive. A hernia repair is not indicated to improve the couple’s chances of conception. Watching and waiting is not appropriate, and referral to fertility services is recommended. Finally, while sertraline and other SSRIs are not teratogenic, they can cause sexual dysfunction, which should be explored with the patient.
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This question is part of the following fields:
- Reproductive Medicine
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Question 22
Incorrect
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A 45-year-old overweight woman comes to the clinic worried about a lump in her right breast. She was in a car accident as a passenger two weeks ago and suffered a minor neck injury while wearing her seat belt. During the examination, a sizable, hard lump with some skin discoloration is discovered.
What is the most probable diagnosis?Your Answer:
Correct Answer: Fat necrosis
Explanation:Fat necrosis is a condition where local fat undergoes saponification, resulting in a benign inflammatory process. It is becoming more common due to breast-conserving surgery and mammoplasty procedures. Trauma or nodular panniculitis are common causes, with trauma being the most frequent. It is more prevalent in women with large breasts and tends to occur in the subareolar and periareolar regions. The breast mass is usually firm, round, and painless, but there may be a single or multiple masses. It may be tender or painful in some cases, and the skin around the lump may be red, bruised, or dimpled. A biopsy may be necessary to differentiate it from breast cancer.
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This question is part of the following fields:
- Reproductive Medicine
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Question 23
Incorrect
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A 42-year-old female complains of a burning sensation on the anterolateral aspect of her right thigh. The doctor suspects meralgia paraesthetica. Which nerve is the most probable cause of this condition?
Your Answer:
Correct Answer: Lateral cutaneous nerve of thigh
Explanation:A possible cause of burning pain in the thigh is compression of the lateral cutaneous nerve, which can lead to a condition called meralgia paraesthetica. Meralgia paraesthetica, a condition characterized by burning pain in the thigh, may result from compression of the lateral cutaneous nerve of the thigh.
Understanding Meralgia Paraesthetica
Meralgia paraesthetica is a condition characterized by paraesthesia or anaesthesia in the distribution of the lateral femoral cutaneous nerve (LFCN). It is caused by entrapment of the LFCN, which can be due to various factors such as trauma, iatrogenic causes, or neuroma. Although not rare, it is often underdiagnosed.
The LFCN is a sensory nerve that originates from the L2/3 segments and runs beneath the iliac fascia before exiting through the lateral aspect of the inguinal ligament. Compression of the nerve can occur anywhere along its course, but it is most commonly affected as it curves around the anterior superior iliac spine. Meralgia paraesthetica is more common in men than women and is often seen in those aged between 30 and 40.
Patients with meralgia paraesthetica typically experience burning, tingling, coldness, or shooting pain, as well as numbness and deep muscle ache in the upper lateral aspect of the thigh. Symptoms are usually aggravated by standing and relieved by sitting. The condition can be mild and resolve spontaneously or severely restrict the patient for many years.
Diagnosis of meralgia paraesthetica can be made based on the pelvic compression test, which is highly sensitive. Injection of the nerve with local anaesthetic can also confirm the diagnosis and provide relief. Ultrasound is effective both for diagnosis and guiding injection therapy. Nerve conduction studies may also be useful. Overall, understanding meralgia paraesthetica is important for prompt diagnosis and management of this condition.
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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 63-year-old woman with a history of scleroderma presents with recurrent bouts of diarrhoea for the past few months. Her stools are pale, bulky, and offensive during these episodes. She consumes 12 units of alcohol per week. Laboratory tests reveal the following results:
- Hemoglobin: 10.8 g/dL
- Platelets: 231 * 10^9/L
- White blood cells: 5.4 * 10^9/L
- Ferritin: 14 ng/mL
- Vitamin B12: 170 ng/L
- Folate: 2.2 nmol/L
- Sodium: 142 mmol/L
- Potassium: 3.4 mmol/L
- Urea: 4.5 mmol/L
- Creatinine: 77 µmol/L
- Bilirubin: 21 µmol/L
- Alkaline phosphatase: 88 U/L
- Alanine transaminase: 21 U/L
- Gamma-glutamyl transferase: 55 U/L
- Albumin: 36 g/L
What is the most likely complication that has occurred in this patient?Your Answer:
Correct Answer: Malabsorption syndrome
Explanation:Scleroderma (systemic sclerosis) frequently leads to malabsorption syndrome, which is characterized by reduced absorption of certain vitamins (B12, folate), nutrients (iron), and protein (low albumin) as indicated by blood tests.
Understanding Malabsorption: Causes and Symptoms
Malabsorption is a condition that is characterized by diarrhea, steatorrhea, and weight loss. It occurs when the body is unable to absorb nutrients from the food that is consumed. The causes of malabsorption can be broadly divided into three categories: intestinal, pancreatic, and biliary. Intestinal causes include conditions such as coeliac disease, Crohn’s disease, tropical sprue, Whipple’s disease, Giardiasis, and brush border enzyme deficiencies. Pancreatic causes include chronic pancreatitis, cystic fibrosis, and pancreatic cancer. Biliary causes include biliary obstruction and primary biliary cirrhosis. Other causes of malabsorption include bacterial overgrowth, short bowel syndrome, and lymphoma.
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This question is part of the following fields:
- Gastroenterology/Nutrition
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Question 25
Incorrect
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A 32-year-old woman with rheumatoid arthritis (RA) visits her General Practitioner complaining of a 3-day history of a red, swollen and hot left ankle. Her temperature is 38.8 °C. She is experiencing difficulty in walking and her range of ankle movement is severely restricted.
What is the most appropriate initial course of action in primary care?Your Answer:
Correct Answer: Admit to hospital immediately
Explanation:Differential Diagnosis and Treatment of a Swollen, Hot, and Painful Joint in a Febrile Patient
When a patient presents with an acutely swollen, hot, and painful joint accompanied by fever, it is crucial to consider the possibility of septic arthritis or osteomyelitis. Both conditions require urgent medical attention, including prolonged courses of intravenous antibiotics and potential surgical intervention. Aspiration of the joint fluid for Gram staining and culture is necessary before starting empirical antibiotics. However, antibiotic treatment should not be delayed while awaiting results.
Intra-articular steroid injections are not appropriate for this patient, as they may worsen the condition significantly. Similarly, an IM injection of methylprednisolone could potentially have a significant effect on the immune system, leading to overwhelming sepsis. Oral colchicine is used to treat acute gout, which does not typically present with fever. In contrast, RA is a risk factor for developing septic arthritis, and immunosuppressive medications used to treat RA can also increase the risk.
Although oral flucloxacillin is indicated for the treatment of cellulitis, the history and examination findings in this case are more suggestive of septic arthritis. Intravenous antibiotics with or without surgical intervention are necessary for the treatment of septic arthritis. Therefore, it is crucial to differentiate between these conditions and provide appropriate treatment promptly.
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This question is part of the following fields:
- Musculoskeletal
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Question 26
Incorrect
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You assess a 27-year-old female patient who experiences intense, one-sided, pulsating headaches. These occur approximately once a month and are not associated with her menstrual cycle. Prior to the onset of the headache, she occasionally experiences momentary 'zig-zags' in her vision. She has no specific preference for treatment and seeks your guidance on the most effective approach to managing acute episodes. Which of the following options would be the most suitable initial treatment?
Your Answer:
Correct Answer: Oral triptan + oral NSAID
Explanation:Managing Migraines: Guidelines and Treatment Options
Migraines can be debilitating and affect a significant portion of the population. To manage migraines, it is important to understand the different treatment options available. According to the National Institute for Health and Care Excellence (NICE) guidelines, acute treatment for migraines involves a combination of an oral triptan and an NSAID or paracetamol. For young people aged 12-17 years, a nasal triptan may be preferred. If these measures are not effective, non-oral preparations of metoclopramide or prochlorperazine may be considered, along with a non-oral NSAID or triptan.
Prophylaxis should be given if patients are experiencing two or more attacks per month. NICE recommends topiramate or propranolol, depending on the patient’s preference, comorbidities, and risk of adverse events. Propranolol is preferred in women of childbearing age as topiramate may be teratogenic and reduce the effectiveness of hormonal contraceptives. Acupuncture and riboflavin may also be effective in reducing migraine frequency and intensity for some people. For women with predictable menstrual migraines, frovatriptan or zolmitriptan may be recommended as a type of mini-prophylaxis.
Specialists may consider other treatment options, such as candesartan or monoclonal antibodies directed against the calcitonin gene-related peptide (CGRP) receptor, like erenumab. However, pizotifen is no longer recommended due to common adverse effects like weight gain and drowsiness. It is important to exercise caution with young patients as acute dystonic reactions may develop. By following these guidelines and considering various treatment options, migraines can be effectively managed.
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This question is part of the following fields:
- Neurology
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Question 27
Incorrect
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A 23-year-old man presents to his general practitioner (GP) with a nodular rash over his shins, which was dusky blue in appearance at first but has now faded to a bruise-like appearance. His past history of note includes intermittent diarrhoea, occasionally with blood. There is no other past history of note. On examination, there is minor tenderness on the left side of his abdomen, and proctoscopy reveals moderate inflammation of the rectum. Blood testing reveals a raised C-reactive protein (CRP) level and normochromic/normocytic anaemia.
Which diagnosis best fits this clinical picture?Your Answer:
Correct Answer: Ulcerative colitis (UC)
Explanation:Erythema Nodosum and its Association with Various Diseases
Erythema nodosum is a skin condition characterized by painful, red nodules on the legs. It can be associated with various underlying diseases. In patients with ulcerative colitis, erythema nodosum is a common extraintestinal manifestation, along with uveitis, primary sclerosing cholangitis, ankylosing spondylitis, and pyoderma gangrenosum. However, sarcoidosis, tuberculosis, and mycoplasma infection can also cause erythema nodosum. It is important to consider the patient’s clinical presentation and other symptoms to determine the underlying cause. In this case, the patient’s gastrointestinal symptoms suggest inflammatory bowel disease, specifically ulcerative colitis.
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This question is part of the following fields:
- Gastroenterology/Nutrition
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Question 28
Incorrect
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A 35-year-old woman presents with fatigue, fever, dry cough, headache, chest discomfort and worsening difficulty breathing. She works as a factory worker in a plant that produces air filters.
Which of the following pathogens is the most probable cause of this illness?Your Answer:
Correct Answer: Legionella species
Explanation:Differentiating Between Possible Causes of Pneumonia
Pneumonia can be caused by a variety of pathogens, making it important to identify the specific cause in order to provide appropriate treatment. Legionella pneumophila is a common cause of community-acquired and nosocomial pneumonia in adults, often transmitted through contaminated water sources. Chlamydophila psittaci can cause pneumonia after exposure to infected birds, while Staphylococcus aureus can cause various infections when skin or mucosal barriers are breached. Mycoplasma pneumoniae typically causes mild respiratory tract infections, while different groups of Streptococci can cause a range of infections including pneumonia. In this clinical scenario, the patient’s occupation and symptoms suggest an atypical infection, making Legionella pneumophila the most probable cause.
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This question is part of the following fields:
- Infectious Diseases
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Question 29
Incorrect
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A 25-year-old hiker comes to you with complaints of fever, joint pain, and a red rash after being bitten by a tick during a recent hike. Upon examination, you find that his neurological and cardiovascular functions are normal. You suspect that he may have contracted Lyme disease and have ordered serology for Borrelia burgdorferi. What would be the most suitable course of action for managing this condition?
Your Answer:
Correct Answer: 14 day course of doxycycline
Explanation:The recommended initial treatment for early Lyme disease is a 14-21 day regimen of oral doxycycline. For non-disseminated Lyme disease, the first line treatment is a 14-day course of oral doxycycline, making option 2 the correct answer. Amoxicillin may be used if doxycycline is contraindicated, such as during pregnancy. Ceftriaxone is reserved for disseminated disease. Treatment should be initiated based on clinical suspicion, as serology may take several weeks to become positive.
Understanding Lyme Disease
Lyme disease is a bacterial infection caused by Borrelia burgdorferi and is transmitted through tick bites. The early symptoms of Lyme disease include erythema migrans, a characteristic bulls-eye rash that appears at the site of the tick bite. This rash is painless, slowly increases in size, and can be more than 5 cm in diameter. Other early symptoms include headache, lethargy, fever, and joint pain.
If erythema migrans is present, Lyme disease can be diagnosed clinically, and antibiotics should be started immediately. The first-line test for Lyme disease is an enzyme-linked immunosorbent assay (ELISA) to detect antibodies to Borrelia burgdorferi. If the ELISA is negative but Lyme disease is still suspected, it should be repeated 4-6 weeks later. If Lyme disease is suspected in patients who have had symptoms for 12 weeks or more, an immunoblot test should be done.
Tick bites can cause significant anxiety, but routine antibiotic treatment is not recommended by NICE. If the tick is still present, it should be removed using fine-tipped tweezers, and the area should be washed. In cases of suspected or confirmed Lyme disease, doxycycline is the preferred treatment for early disease, while ceftriaxone is used for disseminated disease. A Jarisch-Herxheimer reaction may occur after initiating therapy, which can cause fever, rash, and tachycardia.
In summary, Lyme disease is a bacterial infection transmitted through tick bites. Early symptoms include erythema migrans, headache, lethargy, fever, and joint pain. Diagnosis is made through clinical presentation and ELISA testing, and treatment involves antibiotics. Tick bites do not require routine antibiotic treatment, and ticks should be removed using fine-tipped tweezers.
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This question is part of the following fields:
- Infectious Diseases
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Question 30
Incorrect
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A 65-year-old man comes to the clinic with a blistering rash around his left eye that is causing him pain. Upon examination, a vesicular rash is observed covering the left trigeminal nerve dermatome. The patient reports no current eye symptoms or signs. What factor is most likely to indicate future eye involvement?
Your Answer:
Correct Answer: Presence of the rash on the tip of his nose
Explanation:Hutchinson’s sign is a reliable indicator of potential ocular involvement.
Herpes Zoster Ophthalmicus: Symptoms, Treatment, and Complications
Herpes zoster ophthalmicus (HZO) is a condition that occurs when the varicella-zoster virus reactivates in the area supplied by the ophthalmic division of the trigeminal nerve. It is responsible for approximately 10% of shingles cases. The main symptom of HZO is a vesicular rash around the eye, which may or may not involve the eye itself. Hutchinson’s sign, a rash on the tip or side of the nose, is a strong indicator of nasociliary involvement and increases the risk of ocular involvement.
Treatment for HZO involves oral antiviral medication for 7-10 days, ideally started within 72 hours of symptom onset. Intravenous antivirals may be necessary for severe infections or immunocompromised patients. Topical antiviral treatment is not recommended for HZO, but topical corticosteroids may be used to treat any secondary inflammation of the eye. Ocular involvement requires urgent ophthalmology review to prevent complications such as conjunctivitis, keratitis, episcleritis, anterior uveitis, ptosis, and post-herpetic neuralgia.
In summary, HZO is a condition caused by the reactivation of the varicella-zoster virus in the ophthalmic division of the trigeminal nerve. It presents with a vesicular rash around the eye and may involve the eye itself. Treatment involves oral antiviral medication and urgent ophthalmology review is necessary for ocular involvement. Complications of HZO include various eye conditions, ptosis, and post-herpetic neuralgia.
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This question is part of the following fields:
- Ophthalmology
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