Medicine General 0f5801a8 Nephrocalcinosis is a feature of A/E: A Primary hyperparathyroidism B Medullary sponge kidney C Vitamin D intoxication D Pseudo hypoparathyroidism High-Yield Explanation Answer is D (Pseudohypoparathyroidism): Primary hyperparathyroidism. Medullary Sponge Kidney and Vitamin D excess are established causes. for nephrocalcinosis.