Serum nonprotein nitrogen was slightly elevated, but serum phosphorus level, alkaline phosphatase activity and cholesterol level were within normal ranges. Roentgenogram of the bones showed dense lines at the end of the long bones and a slight osteosclerosis. Calcification

The disease called " Idiopathic hypercalcemia of infancy " is clinically characterized by growth failure, anorexia, constipation, vomiting and a peculiar face. Laboratory studies disclose hypercalcemia and elevating of blood urea. Butler') and Fanconi2)3) reported the first two cases in 1951. In 1952, the syndrom was clearly delineated by Lightwood and Payne4) for the first time. Idiopathic hypercalcemia of infancy has thus far been discussed mainly in Great Britain,' )4)5-17) but recently in United States18-20) several cases have been reported. In the present paper we shall describe the first report of this disease in Japan.