<prompt> All are the causes of nephrocalcinosis in granulomatous disease except -Increased absorption of ca from intestineIncreased conversion to 1,25 OH 2 DIncreased bone resorptionMutation in calcium sensing receptor  <response>: In granulomatous diseases ,granulomas have 1alpha hydroxylase activity . So there is increased conversion of 25OH D to 1,25OH 2 D. Increased active vitamin d INCREASES-reabsorption of calcium in PCT, bone resorption ,absorption of ca in intestine-resulting in hypercalcemia. Hypercalcemia results in-nephrocalcinosis, nephrolithiasis ,nephrogenic diabetes insipidus . Ref:Harrison 20 th edition pg no 2603 