Endocrine Abstracts

Background: The 24-hydroxylase enzyme is responsible for the degradation of 1,25-dihydroxyvitamin D3. Loss of function mutations of the gene encoding 24-hydroxylase, CYP24A1, may cause hypercalcaemia, nephrolithiasis and nephrocalcinosis, and are responsible for some cases of idiopathic hypercalcaemia of infancy.Case: The index case presented with faltering growth at 4 months old. She was hypercalcaemic with serum calcium 2.79 mmol/l (normal r...