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Question 1
Incorrect
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Briefly state the mechanism of action of salbutamol.
Your Answer: Beta2 receptor agonist which increases cGMP levels and leads to muscle relaxation and bronchodilation
Correct Answer: Beta2 receptor agonist which increases cAMP levels and leads to muscle relaxation and bronchodilation
Explanation:Salbutamol stimulates beta-2 adrenergic receptors, which are the predominant receptors in bronchial smooth muscle (beta-2 receptors are also present in the heart in a concentration between 10% and 50%).
Stimulation of beta-2 receptors leads to the activation of enzyme adenyl cyclase that forms cyclic AMP (adenosine-mono-phosphate) from ATP (adenosine-tri-phosphate). This increase of cyclic AMP relaxes bronchial smooth muscle and decrease airway resistance by lowering intracellular ionic calcium concentrations. Salbutamol relaxes the smooth muscles of airways, from trachea to terminal bronchioles.
Increased cyclic AMP concentrations also inhibits the release of bronchoconstrictor mediators such as histamine and leukotriene from the mast cells in the airway.
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This question is part of the following fields:
- Respiratory
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Question 2
Incorrect
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A 22 year-old university graduate presented with progressive unsteadiness during walking over the last year. She had been otherwise healthy apart from recent difficulty hearing her lecturer in classes. She took no prescription medication but had occasionally taken cocaine during her first year of college. She also admits to drinking up to 30 units of alcohol per week and smoked 10 cigarettes per day. Her parents were both well, but her father's sister had problems with walking before she died. Examination reveals normal tone and power throughout all four limbs. Reflexes were normal in the upper limbs but decreased at the knees and absent at the ankles. Coordination was normal in all four limbs but her gait was ataxic. Sensation in the upper limbs was normal but decreased vibratory sensation and proprioception was noted to the ankles bilaterally. What is the most likely diagnosis?
Your Answer: Vitamin B12 deficiency
Correct Answer: Friedreich’s ataxia
Explanation:Friedreich’s ataxia is an autosomal recessive disorder that usually begins before the end of the teens. It has an estimated prevalence in Europe of 1 in 50,000 and life expectancy is around 40–50 years. Neurological features include a progressive ataxia, cerebellar dysarthria, lower limb areflexia, decreased vibratory sensation and proprioception, and pyramidal weakness. Pes cavus and scoliosis are also both seen. Cardiomyopathy occurs in over 70% of cases. Less common features include optic atrophic, diabetes mellitus, and deafness.
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This question is part of the following fields:
- Neurology
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Question 3
Incorrect
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A 32 yr. old male who was on methadone has suddenly collapsed while running and was found dead. What is the most likely cause for his death?
Your Answer: VF
Correct Answer: Prolonged QT
Explanation:Methadone and cocaine can cause QT prolongation through the direct effects on the resting membrane potential. Methadone can increase QT dispersion in addition to QT interval. Methadone inhibits the Human Ether-a-go-go Related Gene (hERG) and causes QTc prolongation and development of Torsades de point. Brugada-like syndrome is another condition found in methadone users which predisposes the users to life-threatening ventricular tachycardia and sudden cardiac death.
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This question is part of the following fields:
- Cardiology
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Question 4
Correct
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Which of the following is NOT a cause of onycholysis?
Your Answer: Mycoplasma pneumonia
Explanation:Onycholysis is the separation of the distal edge of the nail from the vascular nailbed causing whiteness of the free edge. Causes include:
– Idiopathic
– Trauma, excessive manicuring
– Infection: especially fungal
– Skin disease: psoriasis, dermatitis
– Impaired peripheral circulation e.g. Raynaud’s
– Systemic disease: hyper/hypothyroidism, reactive arthritis, porphyria cutanea tarda
– Sometimes a reaction to detergents (e.g. washing dishes with bare hands, using detergent-based shampoos or soaps).
– Patients with hepatocellular dysfunction may develop hair-thinning or hair loss and nail changes such as clubbing, leukonychia (whitening), or onycholysis. -
This question is part of the following fields:
- Dermatology
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Question 5
Correct
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A 20-year-old student presents to the university health service complaining of flu-like symptoms, lethargy and jaundiced sclerae and an inability to eat due to a sore throat. He remembered that his father may have suffered from a liver condition. On further questioning a history of intravenous drug use on two occasions is identified. Investigations reveal: Alanine transaminase (ALT) 23 U/l, Aspartate transaminase (AST) 28 U/l, Bilirubin 78 μmol/L, Albumin 41g/l. Which of the following diagnoses fits best with this clinical picture?
Your Answer: Gilbert’s syndrome
Explanation:When a patient presents with an illness (unrelated to the liver) or a stressful event on the body, and develops asymptomatic jaundice, think Gilbert’s syndrome. It is autosomal dominant. It is an unconjugated hyperbilirubinemia from impaired glucuronyl transferase. Classically, Crigler-Najjar would be in infants, and it would be symptomatic. It is also an unconjugated hyperbilirubinemia.
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This question is part of the following fields:
- Gastroenterology
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Question 6
Correct
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A neonate was brought in by her mother, for a skin lesion present over the neonate's back which is bluish in colour, but otherwise asymptomatic. The most appropriate course of action will be?
Your Answer: Reassure
Explanation:A Mongolian spot can be present in new born babies which usually appears over the back and fades with time. There is nothing to worry about.
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This question is part of the following fields:
- Dermatology
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Question 7
Correct
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A 14-year-old boy presents with a rash on his buttocks and extensor surfaces following a sore throat. What is the most probable diagnosis?
Your Answer: Henoch-Schönlein purpura (HSP)
Explanation:Henoch-Schönlein purpura (HSP) rashes are commonly found on the legs, feet, and buttocks while Immune thrombocytopenia (ITP) rashes manifest predominantly on the lower legs. HSP happens following a sore throat while ITP usually happens following an URTI or Flu. HSP is an inflammation of a blood vessel (vasculitis) while ITP is immune mediated insufficiency of platelets.
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This question is part of the following fields:
- Dermatology
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Question 8
Correct
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A 28 yr. old primigravida in her 24th week of pregnancy came for the routine follow up. She was asymptomatic at the time of examination. Her blood pressure was 152/92 mmHg and pulse rate was 90 bpm. Her blood pressure at the booking visit had been 132/80 mmHg. Her other examination findings were normal. Which of the following is the best method to use to treat her?
Your Answer: Labetalol
Explanation:Methyldopa is the drug of first choice for the control of mild to moderate hypertension in pregnancy. Labetalol is also considered as a first line drug for hypertension in pregnancy. Calcium channel blockers and hydralazine are considered as second line drugs. Beta-blockers (except labetalol), angiotensin receptor blockers, angiotensin-converting enzyme inhibitors and thiazides are not recommended.
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This question is part of the following fields:
- Cardiology
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Question 9
Incorrect
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A 30-year-old woman who underwent a live related renal transplant for end-stage renal failure secondary to chronic pyelonephritis 4 months ago, now attends the clinic for routine follow up. She is taking tacrolimus and mycophenolate mofetil (MMF). Her urea and electrolytes are: Na+ 136 mmol/L, K+ 3.7 mmol/L, Urea 7.2 mmol/L, Creatinine 146 μmol/L. She was last seen in clinic 2 weeks previously when her urea was 4.2 mmol/l and creatinine 98 μmol/l. She is clinically well and asymptomatic. On examination she was apyrexial and normotensive. Her transplant site was non-tender with no swelling and there were no other signs to be found. Which initial investigations should be performed first?
Your Answer: Tacrolimus levels
Correct Answer: Urine and blood cultures
Explanation:After renal transplant, asymptomatic patients can still have graft dysfunction as an early complication, with rising serum creatinine; therefore, urine and blood cultures should be ordered first. This should be followed by measuring the Tacrolimus levels, as this drug can be directly nephrotoxic. Next, a Doppler ultrasound of the transplant site should be ordered, to check for any obstructions or occlusions.
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This question is part of the following fields:
- Nephrology
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Question 10
Incorrect
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A 43 year old ex-marine who has a history of post-traumatic stress disorder visits the office for a review. He is reluctant to try cognitive behavioural therapy. Which medication could be useful in this patient?
Your Answer: Bupropion
Correct Answer: Mirtazapine
Explanation:Post-traumatic stress disorder (PTSD) is an anxiety disorder caused by stressful, frightening or distressing events.
PTSD is a lasting consequence of traumatic ordeals that cause intense fear, helplessness, or horror, such as a sexual or physical assault, the unexpected death of a loved one, an accident, war, or natural disaster. Families of victims can also develop PTSD, as can emergency personnel and rescue workers.
PTSD is diagnosed after a person experiences symptoms for at least one month following a traumatic event. However symptoms may not appear until several months or even years later. The disorder is characterized by three main types of symptoms:
-Re-experiencing the trauma through intrusive distressing recollections of the event, flashbacks, and nightmares.
-Emotional numbness and avoidance of places, people, and activities that are reminders of the trauma.
-Increased arousal such as difficulty sleeping and concentrating, feeling jumpy, and being easily irritated and angered.The goal of PTSD treatment is to reduce the emotional and physical symptoms, to improve daily functioning, and to help the person better cope with the event that triggered the disorder. Treatment for PTSD may involve psychotherapy (a type of counselling), medication, or both.
Eye Movement Desensitization and Reprocessing (EMDR) therapy was initially developed in 1987 for the treatment of posttraumatic stress disorder (PTSD) and is guided by the Adaptive Information Processing model. EMDR is an individual therapy typically delivered one to two times per week for a total of 6-12 sessions, although some people benefit from fewer sessions. Sessions can be conducted on consecutive days.
Drug treatments (paroxetine, mirtazapine, amitriptyline or phenelzine) should be considered for the treatment of PTSD when a sufferer expresses a preference to not engage in trauma-focused psychological treatment.
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This question is part of the following fields:
- Psychiatry
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Question 11
Correct
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A 14-day-old baby presented in NICU with the signs and symptoms of hydrocephaly, seizures and chorioretinitis. Which of the following infectious agents is most probably the cause in a case like this?
Your Answer: Cytomegalovirus (CMV)
Explanation:CMV is a common virus in the herpesvirus family that can cause serious illness in newborns when contracted congenitally from the mother during pregnancy. Congenital CMV infection can lead to various neurological manifestations, including hydrocephaly (enlargement of the fluid-filled spaces within the brain), seizures, and chorioretinitis (inflammation of the retina in the eye). These symptoms can result in significant morbidity and long-term complications for the affected infant.
Other congenital infections such as toxoplasmosis, rubella, herpes simplex virus (HSV), and syphilis can also cause similar symptoms in newborns. However, given the presentation described, CMV is the most likely infectious agent.
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This question is part of the following fields:
- Infectious Diseases
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Question 12
Incorrect
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During the examination of an elderly confused and non-coherent gentleman who was brought to casualty by a concerned neighbour, you notice that he has bilaterally small pupils, which do not appear to react to light. Under the circumstances, it is difficult to judge their response to accommodation. Which of the following conditions may not account for the pupillary appearance in this patient?
Your Answer: Opiate analgesia
Correct Answer: Acute alcohol intoxication
Explanation:Acute alcohol intoxication presents with pupillary dilation, thus, this is ruled out in this patient. All the other listed causes present with small pupils bilaterally.
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This question is part of the following fields:
- Neurology
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Question 13
Correct
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A 60 yr. old man with atrial fibrillation (AF) who is on warfarin, is awaiting tooth extraction. His latest INR 2 weeks ago was 2.7 and his target INR is 2.0-3.0. Which of the following is the most appropriate management?
Your Answer: Check INR 72 hours before procedure, proceed if INR < 3.5
Explanation:The latest research recommends that simple tooth extraction in patients on warfarin treatment can be performed safely without high risk of bleeding, providing that the INR is equal to or less than 3.5 on the day of extraction. A close follow-up and monitoring of patients taking warfarin is mandatory after dental extraction.
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This question is part of the following fields:
- Cardiology
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Question 14
Correct
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A 8 year old boy presented with pain and swelling around the right eye. On examination there was no proptosis or ophthalmoplegia. Which of the following is the most probable diagnosis?
Your Answer: Peri orbital cellulitis
Explanation:Infections of the superficial skin around the eyes are called periorbital, or preseptal, cellulitis. It is predominantly a paediatric disease. Erysipelas is a bacterial skin infection involving the upper dermis which extends into the superficial cutaneous lymphatics. Sinusitis is in sinuses. Orbital infections and conjunctivitis are within the eye.
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This question is part of the following fields:
- Ophthalmology
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Question 15
Incorrect
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A 45-year-old woman has been diagnosed with T1N1M1 malignancy in the left breast, with metastases detectable in the lower thoracic vertebrae and the left lung. Before the initiation of treatment of this patient with trastuzumab, which is the most important investigation to perform?
Your Answer: Pulmonary function tests
Correct Answer: Echo
Explanation:Before the initiation of trastuzumab, an echocardiography is a must to rule out any pre-existing cardiac abnormalities as trastuzumab is cardiotoxic.
Trastuzumab (Herceptin) is a monoclonal antibody directed against the HER2/neu receptor. It is used mainly in metastatic breast cancer although some patients with early disease are now also given trastuzumab.
Adverse effects include:
Flu-like symptoms and diarrhoea are common.
Cardiotoxicity:
– Risk increases when anthracyclines are used concomitantly.
– Trastuzumab-induced cardiac dysfunctions are regarded as less severe and largely reversible because primary cardiomyocyte do not show ultrastructure changes unlike those associated with anthracycline-induced cardiotoxicity.
– Primary myocyte injury does not occur in patients who were treated with trastuzumab. -
This question is part of the following fields:
- Pharmacology
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Question 16
Correct
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A 62year-old manpresents with exertional chest pain and is found to have extensive coronary artery disease on angiogram. Which of the following cell types is most implicated in the development of coronary artery plaques?
Your Answer: Macrophages
Explanation:An atheroma is an accumulation of degenerative material in the tunica intima (inner layer) of artery walls. The material consists of (mostly) macrophage cells, or debris, containing lipids (cholesterol and fatty acids), calcium and a variable amount of fibrous connective tissue.
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This question is part of the following fields:
- Clinical Sciences
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Question 17
Correct
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A 24 year old presents with diarrhoea. She has had a previous ileal resection for Crohn's Disease. She has also had two recent episodes of loin to groin pain. Her bloods are normal including her inflammatory markers What is the most likely diagnosis?
Your Answer: Short bowel syndrome
Explanation:Given her history of bowel resections, the most likely answer in this case is short bowel syndrome. IBS is a diagnosis of exclusion and less likely. Bacterial overgrowth does not relate to resection history, so unlikely. Celiac disease or a flare of IBD are also less likely than short bowel syndrome in this case, simply given the history. Also her labs are normal making these unlikely. History, history, history!
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This question is part of the following fields:
- Gastroenterology
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Question 18
Correct
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A 50-year-old patient was started on ezetimibe, for his cholesterol a few days back. Which among the following statements is true regarding ezetimibe?
Your Answer: Its principal action is to reduce intestinal cholesterol absorption
Explanation:Ezetimibe is a cholesterol-lowering agent that acts to prevent cholesterol absorption by directly inhibiting cholesterol receptors on enterocytes.
It does not affect the absorption of drugs (e.g. digoxin, thyroxine) or fat-soluble vitamins (A, D and K) as the anion-exchange resins do. It does not affect the cytochrome P450 enzyme system.
The increased risk of myositis associated with the statins is not seen with ezetimibe.
The most common adverse effects include headache, runny nose, and sore throat.
Less common reactions include body aches, back pain, chest pain, diarrhoea, joint pain, fatigue, and weakness. -
This question is part of the following fields:
- Pharmacology
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Question 19
Correct
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A 25 yr. old male presented with acute severe central chest pain which radiated backwards between his scapulae. He didn't have difficulty in breathing and the pain wasn't exacerbated by deep inspiration or a change in position. His father had died due to a heart disease when he was small. He also has a cardiac murmur which was never properly investigated. On examination he was tachycardic with a BP of 165/60 mmHg. There was a diastolic murmur at lower left sternal border which is best heard with the patient sitting forward. Which of the following is the most probable cause for his chest pain?
Your Answer: Aortic dissection
Explanation:The most probable diagnosis is Marfan’s syndrome because of a family history of cardiac death and heart murmurs. A characteristic feature is pain which radiates to the back. A wide pulse pressure and a diastolic heart murmur is suggestive of aortic dissection.
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This question is part of the following fields:
- Cardiology
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Question 20
Incorrect
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A 25 yr. old male presented with an episode of syncope. His examination findings were normal. He gave a history of sudden cardiac death of a close relative. His ECG showed incomplete right bundle-branch block and ST-segment elevations in the anterior precordial leads. What is the most probable diagnosis?
Your Answer: Hypertrophic Cardiomyopathy
Correct Answer: Brugada syndrome
Explanation:Brugada syndrome is an autosomal dominant disorder characterized by sudden cardiac death. The positive family history and characteristic ECG findings are in favour of Brugada syndrome. Usually the physical findings are normal.
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This question is part of the following fields:
- Cardiology
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Question 21
Correct
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A 48-year-old ex-footballer with a long history of alcohol abuse, presents with epigastric pain. Which of the following suggests a diagnosis of peptic ulceration rather than chronic pancreatitis?
Your Answer: Relieved by food
Explanation:Relief of symptoms with food suggests duodenal ulceration, for which the pain gets worse on an empty stomach. In chronic pancreatitis, you would expect worsening of symptoms with food.
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This question is part of the following fields:
- Gastroenterology
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Question 22
Incorrect
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A 34-year-old woman is admitted to the hospital with a one-week history of dark urine and fatigue. One day before admission, she developed severe abdominal pain and abdominal distension. On examination, she has pallor, jaundice, an enlarged tender liver, and ascites. Her investigations show: Hb: 7.9 g/dL, WCC: 3.2 x 10^9/L, Plts: 89 x 10^9/L, MCV: 101 fL. Peripheral smear: Mild polychromasia, AST: 144 U/L, ALT: 130 U/L, Bilirubin: 54 μmol/L. Urine hemosiderin: ++, Urine urobilinogen +. Abdominal ultrasound reveals an enlarged liver, ascites, and absent flow in the hepatic veins. Which single test would you request to confirm the underlying diagnosis?
Your Answer: Liver biopsy
Correct Answer: Flow cytometry for CD55 and CD59 expression
Explanation:The patient has paroxysmal nocturnal haemoglobinuria (PNH) complicated by acute hepatic vein thrombosis (Budd–Chiari syndrome).
PNH is an acquired clonal disorder of haematopoietic stem cells, characterised by variable combination of intravascular haemolysis, thrombosis, and bone marrow failure. Diagnosis is made by flow cytometric evaluation of blood, which confirms the CD55 and CD59 deficiencies and deficiency of expression of other GPI-linked proteins. This test is replacing older complement-based assays such as the Ham test and sucrose lysis test.
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This question is part of the following fields:
- Haematology & Oncology
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Question 23
Correct
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A 51-year-old man was brought to the Emergency department for loose stools. He was dehydrated, weak and in shock. He had previously been complaining of large stool volumes for a one month period. Stool colour was normal. There was no history of laxative abuse and no significant past medical history. What is the most likely diagnosis?
Your Answer: VIPoma
Explanation:Given that the patient has had large amount, high volume watery diarrhoea in an acute period of time, from the answer choices given, this narrows the diagnosis down to VIPoma or carcinoid syndrome. You would expect with carcinoid syndrome for there to be periodic episodes of diarrhoea, though, with a description of flushing, additionally, associated with these episodes. Thus, VIPoma is the most likely answer here. VIPomas are known to cause hypokalaemia from this large amount of watery diarrhoea. Stool volume should be > 700 ml/day.
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This question is part of the following fields:
- Gastroenterology
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Question 24
Correct
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Intracellular proteins tagged with mannose-6-phosphate are destined to which of the following organelles?
Your Answer: Lysosome
Explanation:Lysosomal hydrolases are synthesized in the rough endoplasmic reticulum and specifically transported through the Golgi apparatus to the trans-Golgi network, from which transport vesicles bud to deliver them to the endosomal/lysosomal compartment. The explanation of how the lysosomal enzymes are accurately recognized and selected over many other proteins in the trans-Golgi network relies on them being tagged with a unique marker: the mannose-6-phosphate (M6P) group, which is added exclusively to the N-linked oligosaccharides of lysosomal soluble hydrolases, as they pass through the cis-Golgi network. Generation of the M6P recognition marker depends on a reaction involving two different enzymes: UDP-N-acetylglucosamine 1-phosphotransferase and α-N-acetylglucosamine-1-phosphodiester α-N-acetylglucosaminidase.
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This question is part of the following fields:
- Clinical Sciences
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Question 25
Incorrect
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A 30-year-old woman presents with amenorrhoea and galactorrhoea. She has normal visual fields. You are concerned that she may have a prolactinoma. Investigations were done and the results are as shown below: Hb 12.5 g/dL, WCC 4.9 x109/L, PLT 199 x109/L, Na+ 140 mmol/L, K+ 4.9 mmol/L, Creatinine 90 ىmol/L, Prolactin 1150 mU/l. MRI shows a 7 mm pituitary microadenoma. Which of the following hormones would you expect to be lower than normal?
Your Answer: GH
Correct Answer: LH
Explanation:Prolactinomas, benign lesions that produce the hormone prolactin, are the most common hormone-secreting pituitary tumours.
Based on its size, a prolactinoma can be classified as a microprolactinoma (< 10 mm diameter) or a macroprolactinoma (>10 mm diameter). If the prolactinoma is large enough to compress the surrounding normal hormone-secreting pituitary cells, it may result in deficiencies of one or more hormones (e.g., thyroid-stimulating hormone [TSH], growth hormone [GH], adrenocorticotropic hormone). However, the patient has microadenoma so it is unlikely to cause compression manifestations.
Hyperprolactinemia inhibits GnRH secretion from the medial basal hypothalamus and LH release from the pituitary. -
This question is part of the following fields:
- Endocrinology
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Question 26
Correct
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A 63-year-old gentleman with chronic kidney disease secondary to diabetes mellitus is reviewed. When assessing his estimated glomerular filtration rate (eGFR), which one of the following variables is not required by the Modification of Diet in Renal Disease (MDRD) equation?
Your Answer: Serum urea
Explanation:A formula for estimating glomerular filtration rate (eGFR) is the Modification Diet of Renal Disease (MDRD) equation which takes into account the following variables: serum creatinine, age, gender, and ethnicity. Thus, serum urea is not required in this formula.
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This question is part of the following fields:
- Nephrology
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Question 27
Incorrect
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A non-cyanosed 1-year-old female patient has a continuous murmur which is loudest at the left sternal edge. What pulse abnormality is most associated with patent ductus arteriosus if that's her suspected diagnosis?
Your Answer:
Correct Answer: Collapsing pulse
Explanation:DIAGNOSIS:
A consensus definition for hemodynamically significant PDA is lacking. The diagnosis is often suspected clinically, when an infant demonstrates signs of excessive shunting from the arterial to pulmonary circulation. Continuous or a systolic murmur; note, a “silent” PDA may also occur when the ductus shunt is large enough that nonturbulent flow fails to generate a detectible murmur.
A low diastolic blood pressure (due to runoff into the ductus during diastole, more frequent in the most premature infants).
A wide pulse pressure (due to ductus runoff or steal)Hypotension (especially in the most premature infants)
Bounding pulses
Increased serum creatinine concentration or oliguria
Hepatomegaly -
This question is part of the following fields:
- Clinical Sciences
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Question 28
Incorrect
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A 63-year-old gentleman presents with left-sided eye pain and diplopia for the past 2 days. Examination of his eyes shows his pupils equal and reactive to light with no proptosis. There is however an apparent palsy of the 6th cranial nerve associated with a partial 3rd nerve palsy on the left side. Examining the remaining cranial demonstrates hyperaesthesia of the upper face on the left side. Where is the likely lesion?
Your Answer:
Correct Answer: Cavernous sinus
Explanation:A lesion on the cavernous sinus would explain the palsy observed on the III and VI cranial nerves because the cranial nerves III, IV, V, and VI pass through the cavernous sinus. Pain in the eye is due to the nearby ophthalmic veins that feeds the cavernous sinus. Additionally, the lesions in the other structures would have presented with pupil abnormalities and less localized pain and symptoms.
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This question is part of the following fields:
- Neurology
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Question 29
Incorrect
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A 21-year-old gentleman presents with facial and ankle swelling. This has slowly been developing over the past week. During the review of systems, he describes passing ‘frothy’ urine. A urine dipstick shows protein +++. What is the most likely cause of this presentation?
Your Answer:
Correct Answer: Minimal change disease
Explanation:Minimal change glomerulonephritis usually presents as nephrotic syndrome wherein the patient (usually a young adult) will present with proteinuria, oedema, and impaired kidney function, which were evident in this patient.
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This question is part of the following fields:
- Nephrology
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Question 30
Incorrect
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A diagnosed case of scabies presented in OPD for some medical advice. Which of the following statements best suits scabies?
Your Answer:
Correct Answer: It causes itchiness in the skin even where there is no obvious lesion to be seen
Explanation:Scabies is an infection caused by a microscopic mite known as Sarcoptes scabies. The chief presenting complaint is itching especially in skin folds and mostly during night. It spreads from one person to another through skin contact, and therefore it is more prevalent in crowded areas like hospitals, hostels and even at homes where people live in close contact with each other. Treatment options include benzyl benzoate, ivermectin, sulphur and permethrin.
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This question is part of the following fields:
- Dermatology
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SESSION STATS - PERFORMANCE PER SPECIALTY
