[Percutaneous ultrasonic-guided nephropyelostomy in tumor-caused block of urinary outflow].

A report is given on the method and results of ultrasound-guided nephropyelostomy which has been performed here for several years without open surgical intervention. The method has a low rate of complications and can be applied in severely ill patients, too. The problems of ureteral obstruction are quickly eliminated, even if the tumor has not been removed by chemotherapy, radiotherapy, or surgery. The authors report on 47 interventions performed in 36 patients.