Abstract
INTRODUCTION: Secondary retroperitoneal fibrosis (RPF) due to pelvic radiation alone or together with pelvic surgery is one of the causes of obstructive renal failure. Ureteral obstruction is caused by ischemic stricture and encasement by fibrotic tissue. Endo-ureterotomy alone, without vascular supply, is not successful in these cases. MATERIAL AND METHODS: We present eleven cases of ureteral obstruction due to radiation and surgery induced RPF. Seven patients had radiation therapy with or without radical hysterectomy and three patients had anterior resection of the rectum with pre-emptive radiation and one patient had anal cancer treated with local excision and radiation therapy. Nine of the eleven patients had bilateral ureteral obstruction. Open ('intubated') stented ureterotomy and omental sleeve wrap was performed. In one patient, Boari flap ureteroneocystostomy was necessary. RESULTS: Of the eleven patients (twenty renal units) we succeeded in nine patients (eighteen renal units). In two patients with bilateral ureteral obstruction, we were able to reestablish ureteral patency in only one renal unit each. CONCLUSIONS: Ureterolysis with ureterotomy and omental sleeve wrap is a valid surgical approach for alleviation of ureteral ischemic obstruction due to secondary retroperitoneal fibrosis caused by radiation alone or together with pelvic surgery.