Mondo Description Nephrocalcinosis is a disorder that occurs when too much calcium is deposited in the kidneys. It commonly occurs in premature infants. Individuals may not have symptoms or may have symptoms related to thecondition causing nephrocalcinosis. If kidney stones are present, symptoms may include blood in the urine, fever and chills, nausea and vomiting, and severe pain in the belly area, sides of the back (flank), groin, or testicles. Later symptoms may be associated with chronic kidney failure. It may be caused by use of certain medications or supplements, infection, or any condition that leads to high levels of calcium in the blood or urine including hyperparathyroidism, renal tubular acidosis, Alport syndrome, Bartter syndrome,and a variety of other conditions. Some of the underlying disorders that can cause nephrocalcinosis are genetic, with the inheritance pattern depending on the specific disorder. Treatment differs depending on the cause of nephrocalcinosis and often aims to prevent more calcium from being deposited in the kidneys.