Extrarenal calyces: a rare renal congenital anomaly.

The congenital anomalies of urogenital system are not uncommon. The anomalies of renal collecting system form a complex subset of urogenital anomalies. Among these, extrarenal calyces are one of the infrequently found anomalies of the renal collecting system. Extrarenal calyces may be detected incidentally or when thoroughly investigated for its associated complications. We report two cases of extrarenal calyces characterized by the presence of major calyces and renal pelvis outside the renal parenchyma. The awareness of this anomaly can help in making the definitive preoperative diagnosis and prevent injury to pelvicalyceal system during surgery.