<prompt> All are features of renal tubular acidosis type I, except :Stone in kidneyNo anion gapHypokalemiaFanconi syndrome  <response>: Aswer is D Fanconi syndrome: Fanconis Syndrome is an entity characterized by defective tubular reabsorption of most amino acids, glucose. urate, phosphate and bicarbonate. Defective tubular absorption of bicarbonate, with failure to transpo hydrogen ions causes a renal tubular acidosis producing hyperchloremic acidosis. Proximal A A type II is most often due to generalized proximal tubular dysfunction manifested by glycosuria aminoaciduria and phosphaturia Fanconis Syndrome - Harrisons 