[A case of multilocular renal cyst with calcification].

A 55-year-old woman was incidentally found to have a calcified right renal mass on ultrasonography. A plain film of the abdomen revealed a 3.5 X 4.4 cm, curvilinear calcification in the midportion of the right kidney, and an excretory urogram showed no compression or distortion of the pelvocalyceal system. Computed tomography demonstrated a low density renal mass associated with both peripheral and central calcification. Renal arteriogram revealed a hypovascular mass. Right nephrectomy was performed and the multilocular renal cyst with calcification was confirmed histologically. In the Japanese literature, 53 cases of multilocular renal cyst have been reported, but calcification of the multilocular renal cyst seems to be the first as far as we know.