R.T.A shows all except:: (A) Urine pH always >5.5, (B) Anion gap normal, (C) Bicarbonaturia, (D) Vitamin D deficiency
Answer is D. Renal tubular acidosis- is characterized by damage to tubules ranging from PCT to DCT. In PCT damage , Bicarbonaturia is seen. In DCT damage , inability to acidify urine is seen leading to urine pH >5.5 A causes normal anion gap acidosis. A 1 has calcium loss in urine leading to renal rickets but not nutritional deficiency of vitamin D3. Vitamin D deficiency is seen with Chronic Renal failure.