両側上部尿路結石を合併した交叉性腎変位の1例

Abstract

Crossed renal ectopia is a relatively rare congenital anomaly. A case of crossed renal ectopia with fusion (L-shaped kidney) associated with bilateral upper urinary tract stones (pelvic stone of non-ectopic side and ureteral stone of ectopic side), which occurred in a 74-year-old man is reported. The diagnosis was made by various urological and radiographic examinations. Pyelolithotomy and ureterolithotomy were carried out simultaneously and we confirmed it crossed renal ectopia with fusion at that time. The two stones were recovered to show calcium oxalate by analysis. To date 120 cases of crossed renal ectopia have been reported in Japan including our case and nine cases of them were associated with upper urinary tract stone. There were 7 stones in the non-ectopic side and 3 in the ectopic side.