[Milk of calcium renal stone: a case report]

A case of milk of calcium renal stone is reported. The patient was a 24-year-old woman who complained of dull flank pain on the right side. A plain film of the abdomen revealed a right renal stone, which showed peculiar radiopacity of a half-moon shape in the upright position. The operation was performed on July 6, 1984. Postoperative chemical analysis of sand granules showed calcium oxalate and calcium phosphate.