<prompt> Nephrocalcinosis is a feature of AE:Primary hyperparathyroidismMedullary sponge kidneyVitamin D intoxicationPseudo hypoparathyroidism  <response>: Answer is D Pseudohypoparathyroidism: Primary hyperparathyroidism. Medullary Sponge Kidney and Vitamin D excess are established causes. for nephrocalcinosis. 