Prednisolone and cellulose phosphate treatment in idiopathic infantile hypercalcaemia with nephrocalcinosis.

A girl presented at the age of 8 months with idiopathic infantile hypercalcaemia complicated by hypercalciuria, nephrocalcinosis and failure to thrive. Her hypercalcaemia was partially corrected by prednisolone, but resolved with the addition of cellulose phosphate. Her height and weight showed significant improvement during the treatment period. Cellulose phosphate should be considered in the management of children with idiopathic infantile hypercalcaemia and nephrocalcinosis.