Nephrocalcinosis in a 2-month-old girl suffering from a mild variant of idiopathic infantile hypercalcemia.

Authors present a rare case of a mild variant of idiopathic infantile hypercalcemia (IIH), in a girl in whom nephrocalcinosis was diagnosed in the 8th week of life. Supplementation of vitamin D3 (400 i.u. per day) has been applied since the age of 3 weeks. The disease was recognised when exploring pyuria and lack of weight gain. Hypercalcemia was corrected by diet reduced in calcium, free of vitamin D3 and with high fluid intake. The first abdominal ultrasound after delivery was performed after 5 week vitamin D3 supplementation. It seems that if abdominal ultrasound scan had been done earlier it could have drawn our attention to the developing nephrocalcinosis and allowed us to start treatment more promptly.