Percutaneous pyeloplasty.

The indication for and the technique of the percutaneous operation on strictures at the ureteropelvic junction are reported on 120 patients. The results of evaluation of 66 followed-up cases are presented. The new method proves to be superior to open surgery in secondary (acquired) stenoses with a success rate of 89 per cent, whereas in congenital stenosis the success rate was 75 per cent. However, if this simple and safe technique does fail, open plastic surgery still can be performed.