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Question 1
Correct
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A 2-month-old infant was brought to the paediatrics ward by her mother with a complaint of excessive crying during urination. The urine culture of the infant revealed E.coli. Which of the following investigations should be done next?
Your Answer: US
Explanation:Urine culture confirms a diagnosis of a UTI. A kidney ultrasound will be the next best investigation because it will help us to visualise the bladder, kidneys, and ureters to rule out any congenital obstruction in the urinary tract that might be the actual cause of infection in this 2-month old girl.
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This question is part of the following fields:
- Renal
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Question 2
Correct
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A 3 year old boy is brought to the emergency by his parents with worsening ataxia. They also mention that the boy's urine has a distinct sweet odour. Further investigations reveal the presence of leucine, isoleucine and valine in the urine. What is the diagnosis?
Your Answer: Maple Syrup Urine Disease
Explanation:Maple syrup urine disease (MSUD) is an autosomal recessive metabolic disorder affecting branched-chain amino acids. It is one type of organic academia. The condition gets its name from the distinctive sweet odour of affected infants’ urine, particularly prior to diagnosis, and during times of acute illness. MSUD, also known as branched-chain ketoaciduria, is an aminoacidopathy due to an enzyme defect in the catabolic pathway of the branched-chain amino acids leucine, isoleucine, and valine.
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This question is part of the following fields:
- Renal
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Question 3
Correct
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A 7-year-old boy with facial oedema was brought to the hospital by his parents. Renal function is normal and urinalysis revealed the presence of a profound proteinuria. Which of the following is the most probable cause of these findings?
Your Answer: Minimal-change disease
Explanation:Minimal-change disease (MCD) refers to a histopathologic glomerular lesion, typically found in children, that is almost always associated with nephrotic syndrome. The most noticeable symptom of MCD is oedema, which can develop very rapidly. Due to the renal loss of proteins muscle wasting and growth failure may be seen in children. Renal function is usually not affected and a proteinuria of more than 40 mg/h/m2 is the only abnormal finding in urinalysis.
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This question is part of the following fields:
- Renal
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Question 4
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A 15-year-old boy presents with hypertension and acute renal failure after an episode of diarrhoea. What is the most likely diagnosis?
Your Answer: Haemolytic–uraemic syndrome
Explanation:The likely diagnosis in this case is Haemolytic Uremic Syndrome (HUS), which is generally seen in young children presenting with a triad of symptoms, namely: acute renal failure, microangiopathic haemolytic anaemia, and thrombocytopenia. The typical cause of HUS is ingestion of a strain of Escherichia coli causing diarrhoea in these cases as well.
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This question is part of the following fields:
- Renal
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Question 5
Incorrect
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A 16-year-old boy suffers recurrent episodes of haematuria following a flu-like illness. He is otherwise well. Physical examination is normal. Urinalysis reveals no proteinuria, blood ++, and 2–3 white blood cells/mm3. What is the most probable diagnosis?
Your Answer: Post-streptococcal glomerulonephritis
Correct Answer: IgA nephropathy
Explanation:IgA nephropathy’s characteristic presentation is haematuria following a non-specific upper respiratory infection as was evident in this case. IgA nephropathy also usually occurs in children and young males, like this patient.
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This question is part of the following fields:
- Renal
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Question 6
Correct
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A 4 year old girl is brought to the emergency due to fever and urinary urgency. The temperature is recorded to be 39C. Which of the following is the best investigation in this case?
Your Answer: Clean catch of urine
Explanation:Urine culture and sensitivity is used to diagnose a urinary tract infection (UTI). A mid-stream clean catch urine sample is the most common type of sample collected. It is important to follow the clean catch process to have accurate results from an uncontaminated sample. Urine cultures can also check for infections of the bladder or kidney.
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This question is part of the following fields:
- Renal
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Question 7
Incorrect
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An 8 year old boy is admitted to the ward with renal colic. Family history is significant for similar renal calculi in his mother. Which of the following is the most likely explanation for this recurrent colic in both mother and child?
Your Answer: Cystinuria
Correct Answer: Idiopathic hypercalciuria
Explanation:Idiopathic hypercalciuria (IH) is the commonest metabolic abnormality in patients with calcium kidney stones. It is characterized by normocalcemia, absence of diseases that cause increased urine calcium, and calcium excretion that is above 250 mg/day in women and 300 mg/day in men. Subjects with IH have a generalized increase in calcium turnover, which includes increased gut calcium absorption, decreased renal calcium reabsorption, and a tendency to lose calcium from bone. Despite the increase in intestinal calcium absorption, negative calcium balance is commonly seen in balance studies, especially on a low calcium diet. The mediator of decreased renal calcium reabsorption is not clear| it is not associated with either an increase in filtered load of calcium or altered PTH levels. There is an increased incidence of hypercalciuria in first-degree relatives of those with IH, but IH appears to be a complex polygenic trait with a large contribution from diet to expression of increased calcium excretion. Increased tissue vitamin D response may be responsible for the manifestations of IH in at least some patients.
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This question is part of the following fields:
- Renal
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Question 8
Incorrect
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A 16-year-old girl developed haemoptysis with acute kidney injury requiring dialysis. She suffered from recurrent epistaxis for the past 2 weeks. Renal biopsy showed crescentic glomerulonephritis. Which antibody would you expect to be positive?
Your Answer: Anticardiolipin
Correct Answer: Antiproteinase 3
Explanation:This patient has pulmonary renal syndrome which is most commonly due to an ANCA positive vasculitis. The history of recurrent epistaxis makes Wegener’s granulomatosis the most probable diagnosis. Wegener’s granulomatosis, microscopic polyangiitis, and idiopathic pauci-immune necrotizing crescentic glomerulonephritis (NCGN) are strongly associated with antineutrophil cytoplasmic autoantibodies (ANCAs) directed against either proteinase 3 (anti-PR3) or myeloperoxidase (anti-MPO).
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This question is part of the following fields:
- Renal
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Question 9
Incorrect
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A 11-year-old boy has a history of tonsillitis followed by haematuria and hypertension about 10 days later. What would be the characteristic blood test finding in this condition?
Your Answer: Elevated antinuclear antibody
Correct Answer: Depressed CH 50 level
Explanation:Because the medical history included tonsillitis followed by haematuria and hypertension, there is a strong suspicion of a case of post-streptococcal glomerulonephritis (PSGN). Patients with PSGN usually have serological findings showing depressed serum haemolytic component CH50 and serum concentrations of C3. Sometimes depressed C4 levels are also apparent, but not always, therefore, the answer to this question is: depressed CH50 level.
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This question is part of the following fields:
- Renal
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Question 10
Incorrect
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A 13-year-old male presented in the OPD with bilateral ankle oedema. On examination, his BP was normal. Urinalysis showed a high degree of proteinuria was present. Which of the following is the most probable diagnosis in this patient?
Your Answer: Nephrotic syndrome
Correct Answer: Minimal change GN
Explanation:Minimal change disease is a type of glomerulonephritis that mostly affects younger children. Proteinuria is present which leads to body oedema. But in these patients blood pressure is normal.
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This question is part of the following fields:
- Renal
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