Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Nephrocalcinosis ?
    ### Response:
    What causes nephrocalcinosis? Nephrocalcinosis may be caused by a variety of things, including underlying disorders or conditions, medications or supplements, and infections. Causes may include: Primary hyperparathyroidism is the single most common cause of nephrocalcinosis in adults.
    