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Question 1
Incorrect
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An infant born at term presents with low blood sugar and a history of poor feeding. She was born with exomphalos and a large left arm. What is the most probable condition that the baby is going to develop?
Your Answer: Adrenocortical carcinoma
Correct Answer: Wilms’ tumour
Explanation:The clinical picture suggests that the baby has Beckwith-Wiedemann Syndrome, which predisposes the individual to cancer. The most common childhood tumour that a person with Beckwith-Wiedemann Syndrome may develop is Wilms’ tumour. Typical features include: macrosomia, asymmetric limb growth, macroglossia, neonatal hypoglycaemia, umbilical hernias or other abdominal wall deformities.
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This question is part of the following fields:
- Haematology And Oncology
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Question 2
Correct
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A 16-year-old woman presents with a 7 month history of secondary amenorrhoea and three months history of galactorrhoea. She has been otherwise well. She had menarche at the age of 12 and has otherwise had regular periods. She has been sexually active for approximately one year and has occasionally used condoms for contraception. She smokes five cigarettes daily and occasionally smokes cannabis.On examination, she appears well, and clinically euthyroid, has a pulse of 70 bpm and blood pressure of 112/70 mmHg.Investigations show:Serum oestradiol 130 nmol/L (130-600)Serum LH 4.5 mU/L (2-20)Serum FSH 2.2 mU/L (2-20)Serum prolactin 6340 mU/L (50-450)Free T4 7.2 pmol/L (10-22)TSH 2.2 mU/L (0.4-5.0)What is the most likely diagnosis?
Your Answer: Prolactinoma
Explanation:The patient has hyperprolactinaemia with otherwise normal oestradiol, FSH and LH. This is highly suggestive of Prolactinoma rather than a non functioning tumour.In polycystic ovaries, there is increase in the level of LH while FSH is normal or low.
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This question is part of the following fields:
- Endocrinology
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Question 3
Incorrect
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A 5-day-old infant is admitted to the ward. She was born at full term by normal vaginal delivery weighing 3.48kg and has been breastfed since birth. She has now lost 11% of her birth weight and bilirubin is above the phototherapy line. On examination, her fontanelle is soft, CRT<2 seconds, she is active and alert. U&Es have been sent, and the sodium on a blood gas is 144. You have started phototherapy, but still, need to make a plan about fluids and feeding. Mother wants to continue breastfeeding but is also happy to introduce some formula milk. What is the MOST appropriate course of action?
Your Answer: Continue to exclusively breastfeed and monitor sodium
Correct Answer: Offer NG or cup feeds alongside breastfeeding
Explanation:Excessive weight loss is generally indicative of suboptimal feeding, and infants with excessive weight loss are potentially dehydrated or at risk of dehydration.Jaundice associated with suboptimal breastfeeding– this is classically associated with weight loss >10% and a vicious cycle of sleepiness that in turn leads to further poor feeding. In the absence of clinical signs of dehydration, no evidence suggests that overhydration is helpful. If the infant is dehydrated, hydration should be given as clinically indicated. However, if the infant can tolerate oral feeding, oral hydration with a breast milk substitute is likely to be superior to intravenous hydration because it reduces enterohepatic circulation of bilirubin and helps wash bilirubin out of the bowel.
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This question is part of the following fields:
- Nutrition
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Question 4
Incorrect
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A young female who carries the abnormal RET oncogene has her recurrent laryngeal nerve accidentally divided during a thyroidectomy. Which clinical features are likely to result from this?
Your Answer: All the laryngeal muscles are paralysed on the affected side, apart from the posterior cricoarytenoid muscle
Correct Answer: The larynx is anaesthetised inferior to the vocal cord on the affected side
Explanation:The recurrent laryngeal nerve (RLN) innervates all of the intrinsic muscles of the larynx except for the cricothyroid muscle, which is innervated by the superior laryngeal nerve (SLN).Patients with unilateral vocal fold paralysis present with postoperative hoarseness or breathiness. The presentation is often subacute. At first, the vocal fold usually remains in the paramedian position, creating a fairly normal voice. Definite vocal changes may not manifest for days to weeks. The paralyzed vocal fold atrophies, causing the voice to worsen. Other potential sequelae of unilateral vocal-fold paralysis are dysphagia and aspiration.Bilateral vocal-fold paralysis may occur after total thyroidectomy, and it usually manifests immediately after extubation. Both vocal folds remain in the paramedian position, causing partial airway obstruction. Patients with bilateral vocal-fold paralysis may present with biphasic stridor, respiratory distress, or both. On occasion, the airway is sufficient in the immediate postoperative period despite the paralyzed vocal folds. At follow-up, such patients may present with dyspnoea or stridor with exertion.
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This question is part of the following fields:
- Anatomy
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Question 5
Incorrect
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A 10-year-old newly diagnosed epileptic boy presents with pyrexia and a confluent, blistering rash affecting his torso, arms, and legs. On examination, there are lesions on his mucous membranes also. On palpating the skin overlying the medial malleolus, it shears off with minimal force. What is the sign being elicited?
Your Answer: Forscheimer's sign
Correct Answer: Nikolsky's sign
Explanation:The sign being elicited in this patient is Nikolsky’s sign. Based on the findings, the patient is suffering from toxic epidermal necrolysis.Nikolskys sign: Rubbing the skin causes exfoliation of the outer layer and usually blistering within a few minutes. Other options:- Cullen’s sign: Periumbilical bruising due to intra-abdominal haemorrhage. If the discolouration is seen in the flanks, it is called Cullen’s sign. Underlying pathology includes ruptured ectopic pregnancy and haemorrhagic pancreatitis. – Forscheimer’s sign: It is a fleeting exanthem that is seen as small, red spots (petechiae) on the soft palate. Associated with rubella and glandular fever. Gorlin’s sign: It is the ability to touch the tip of the nose with the tongue. Increased incidence in children with connective tissue disorders, e.g. Ehler Danlos syndrome. – Auspitzs sign: These are small bleeding points left behind when psoriatic scales are lifted off. It is not a very sensitive or specific sign. Other cutaneous signs include:- Hair collar sign: It is a collar of hypertrichosis around an area of cranial dysraphism.- Hertoghe’s sign (Queen Anne’s sign): It is the loss of lateral one-third of eye-brows. It is associated with numerous conditions, including lupus, HIV, and hypothyroidism. – Dariers sign: It is the swelling, itching and erythema that occurs after stroking skin lesions of a patient with systemic mastocytosis or urticarial pigmentosa. – Dermatographism: Rubbing the skin causes a raised, urticarial lesion. – Koebners phenomenon: It is the appearance of new skin lesions in areas of trauma.- Breakfast, lunch, and dinner sign: Linear pathway of a group of three to five papules caused by the common bed bug, Cimex lectularius. – Buttonhole sign: In type 1 neurofibromatosis, neurofibromas can be invaginated with the finger back into the subcutis. The nodule will reappear after the release of pressure. The sign is also positive for dermatofibromas. – Crowe’s sign: Axillary freckling seen in type I neurofibromatosis.
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This question is part of the following fields:
- Dermatology
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Question 6
Incorrect
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A 19-year-old female arrives at the clinic complaining of a facial rash and stiffness in her joints. On examination, she has +1 oedema, slightly swollen metacarpophalangeal joints and ulceration of her buccal mucosa. Her BP is 145/95. Serum creatinine is 92 x 10^12/l. Urinalysis is significant for blood and protein, both +3. High titres of anti-dsDNA are detected in her serum. Which of the following histological changes would be observed in the renal tissue?
Your Answer: Pauci-immune diffuse proliferative glomerulonephritis
Correct Answer: Diffuse proliferative glomerulonephritis with deposits of IgG, IgM and C3
Explanation:Diffuse proliferative glomerulonephritis is a term used to describe a distinct histologic form of glomerulonephritis common to various types of systemic inflammatory diseases, including autoimmune disorders (e.g., systemic lupus erythematosus [SLE]), vasculitis syndromes (e.g., granulomatosis with polyangiitis), and infectious processes. In DPGN, more than 50% of the glomeruli (diffuse) show an increase in mesangial, epithelial, endothelial (proliferative), and inflammatory cells (i.e., glomerulonephritis).
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This question is part of the following fields:
- Nephro-urology
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Question 7
Correct
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Which of the following can cause an increase in alpha-fetoprotein in the pregnant mother?
Your Answer: Posterior urethral valves
Explanation:Alpha-fetoprotein (AFP) is a plasma protein produced by the embryonic yolk sac and the fetal liver. AFP levels in serum, amniotic fluid, and urine functions as a screening test for congenital disabilities, chromosomal abnormalities, as well as some other adult occurring tumours and pathologies.Pregnant maternal serum AFP levels are elevated in:- Neural tube defects (e.g., spina bifida, anencephaly)- Omphalocele- Gastroschisis- posterior urethral valves- nephrosis- GI obstruction- teratomas
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This question is part of the following fields:
- Neonatology
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Question 8
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A 19-year-old male newly diagnosed with HIV is initiated on highly active antiretroviral therapy (HAART). He was previously well and had no past medical or psychiatric history. A few days after starting the medication, he develops poor sleep and nightmares, with low mood and suicidal ideation. Which antiretroviral agent is most probably responsible for the side effects mentioned?
Your Answer: Efavirenz
Explanation:The antiretroviral agent for the side effects mentioned is most probably, efavirenz.Efavirenz is a non-nucleoside reverse transcriptase inhibitor and the most likely cause of new-onset psychiatric symptoms in someone taking HAART. In this scenario the patient had no pre-existing mental health problems, as other antiretrovirals can cause depression and suicidal ideation in those who have a past psychiatric history. Symptoms usually subside after a few weeks of treatment.Other options:- Emtricitabine is a nucleoside reverse transcriptase inhibitor and is also not known to cause psychiatric side effects. The most common side effects of Emtricitabine are rash and darkening of the palms or soles.- Lamivudine is a nucleoside reverse transcriptase inhibitor, which can cause insomnia, but does not commonly cause other psychiatric symptoms.- Rilpivirine is a non-nucleoside reverse transcriptase inhibitor, which can cause depression. However, this is more common in those with a history of mental health problems.- Tenofovir is a nucleotide reverse transcriptase inhibitor. The most common side effect of Tenofovir is gastrointestinal upset. It is not known to cause psychiatric side effects.
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This question is part of the following fields:
- HIV
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Question 9
Correct
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Gertrude is an 18 month old child who is developing normally. Which of the following should she be able to do?
Your Answer: Follow commands such as 'give me a doll please'
Explanation:At the age of 18 months, Gertrude should be able to follow a one step command. At this age she would also be capable of putting words together in 1 or 2 word phrases, scribbling, throwing a ball, and building a tower of four cubes. At 2 she should be able to feed herself with a spoon or a fork, copy a vertical line, ride a tricycle, kick a ball and balance on one foot. Activities such as jumping will follow later on in her development at 3 years.
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This question is part of the following fields:
- Child Development
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Question 10
Correct
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A 5-year-old girl was admitted for fever, anaemia, thrombocytopenia and signs of pulmonary infection. She now presents a few days later with signs of meningism. What is the most probable diagnosis?
Your Answer: Acute lymphoblastic leukaemia (ALL)
Explanation:Acute lymphoblastic leukaemia (ALL) is a cancer of the lymphoid line of blood cells characterized by the development of large numbers of immature lymphocytes. Symptoms may include feeling tired, frequent infections with fever as well as anaemia with thrombocytopenia. As an acute leukaemia, ALL progresses rapidly and is typically fatal within weeks or months if left untreated. The patient’s age also favours the diagnosis of ALL as it occurs most commonly in children, particularly those between the ages of two and five.
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This question is part of the following fields:
- Haematology And Oncology
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