Results of the surgical treatment of congenital hydronephrosis caused by subpelvic obstruction.

The results of surgical treatment for obstruction at the pyeloureteral junction in 282 patients, both children and adults, are presented. Most of the patients were treated by the Anderson-Hynes method, without nephrostomy. Good results were achieved in 71.2%, satisfactory ones in 20.4% of the cases. The rest of the patients underwent further surgery. The causes of late and early postoperative complications are analysed. A good result depends upon the adequate choice of operation and the correct technique of its performance.