Spot Diagnosis

Distal Renal Tubular Acidosis

KP Kulkarni, S Kaur
Department of Pediatrics, PGIMER, Chandigarh, India

Address for Correspondence: Dr Ketan P Kulkarni, APC, PGIMER, Chandigarh, India
Question :
A 2 year old male child with failure to thrive and polyuria. He has non-anion gap metabolic acidosis with hypokalemia. Urine pH was More than 5.5.

What is the diagnosis?

Discussion :
X-ray shows bilateral medullary nephrocalcinosis. The etiological diagnosis of medullary nephrocalcinosis included distal Renal Tubular Acidosis {RTA}, hyperparathyroidism, hyperthyroidism, hypercalciuria, vitamin D intoxication, frusemide. Other rarer causes include sarcoidosis, renal trauma, fungal infections of kidney and immobilization. In this child the diagnosis is Distal RTA.

E-published: April 2009, Vol 6, Issue 4, Art # 22

Correct Answers : yes  48%

Last Shown : Apr 2009
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