Which one of the following is not a feature of type I renal tubular acidosis?
Lower tubule re-absorption of calcium
Defective bicarbonate absorption in distal tubule
Low serum potassium level
Increased anion gap
Mutations in CA2 and TCIRG1 result in osteopetrosis (in which bones are hard but brittle) and renal tubular acidosis. Ref: Robbins basic pathology 9th edition pg no: 801 Nephrocalcinosis is a diffuse deposition of calcium salts in renal tissue in a number of renal diseases, in hypercalcemia, hyperphosphataemia and renal tubular acidosis Ref: Textbook of pathology Harsh Mohan 6th edition page 684.
Urinary tract