<prompt> All are features of renal tubular acidosis type I exceptStone in kidneyNo anion gapHypokalemiaFanconis syndrome  <response>: The hypokalemia and abnormally low excretion of ammonium, as estimated by the urine anion gap, in the absence of glycosuria, phosphaturia, or aminoaciduria Fanconis syndrome, defines the entity of classic distal renal tubular acidosis dA, also known as type 1 A.Fanconis syndrome a type 2 proximal renal tubular acidosis, with loss of glucose and amino acids, as well as defects in the ability of the kidney to acidify and concentrate the urine.Harrison 19e pg: 64e-6 