[Surgical considerations in congenital hydronephrosis]

The anatomo-operative characteristics of the ischemic stenosis of the juxtapyelic part of the ureter, its embryogenic fundamentals, clinical semiology and urography, emphasizing the signs of the latter for the differential diagnosis of hydronephrosis are presented. The most adequate surgical technique, that is the extirpation of the scleroatrophic part of the ureter, followed by uretero-pyelostomy, with special care in preserving the arteries of the ureter, is summarized and the technique for the postoperative drainage of the kidney is pointed out. The poor effectiveness of other procedures are commented.