[Percutaneous treatment of benign ureteral stenoses and fistulae].

Forty-six benign ureteric stenoses in 42 patients were cannulated anterogradely and dilated. In 37 cases, balloon dilatation was carried out followed by a temporary insertion of a ureteric stent. Seven long stenoses were treated by continuous stenting, with a double pigtail stent. In two patients surgery had to be performed following percutaneous catheterisation and dilatation. Seven restenoses were due to tumour recurrences and lymph node metastases; apart from this, the success rate of balloon dilatation was 63%. The patients were observed for one to 41 months with an average of 14 months. Uncomplicated traumatic stenoses and fistulae were successfully treated with only one exception. Prognostically unfavourable features were devascularized ureteric segments, advanced scarring and very long stenoses.