Abstract
Background: A 66-year-old man, known with nephrocalcinosis in his medical history, was complaining of weight loss, pain at the level of the kidneys and at the right hip. Clinical examination revealed no additional abnormalities. The initial laboratory results showed high calcium (3,5 mmol/L), and normal phosphate (1,07 mmol/L) levels. Alkalic phosphatase in blood was 681 U/L, and PTH levels were high (1788 pg/ml).