Serious complications occurred in 2 patients after percutaneous removal of renal calculi. The first was in a patient, who was referred to our institution, with ureteropelvic atresia following three unsuccessful percutaneous attempts to remove an upper ureteral stone which was removed by ureterolithotomy. The second was in one of our patients in whom serious bleeding developed three days postoperatively that was managed with Foley balloon tamponade followed by selective upper pole renal artery branch embolization.