The records of 62 patients with invasive transitional cell carcinoma of the bladder whose planned treatment was radical cystectomy with ileal conduit urinary diversion and postoperative systemic chemotherapy were reviewed. Seven of the patients received radical cystectomy but not postoperative chemotherapy as planned, 3 of them (5%) for reasons directly related to complications from the urinary diversion. Fifty-five patients received the planned postoperative chemotherapy. Complications during chemotherapy that were related to the ileal conduit were urinary tract infection in 37 percent and stenosis at the ureteroileal anastomosis requiring percutaneous nephrostomy in 3.6 percent. Chemotherapy was not discontinued in any patient, however, because of complications specifically related to the urinary diversion. We conclude that the ileal conduit is well tolerated by patients who require systemic chemotherapy and is, today, the simplest, safest, and best diversion method when systemic chemotherapy is to follow radical cystoprostatectomy.