27 percutaneous endopyelotomies were performed in 27 patients from Feb
ruary 1989 to January 1996 to treat 20 cases of congenital hydronephro
sis and 7 cases of acquired stenosis. Strictures of uretero-pelvic jun
ction were treated by electrocautery with postoperative drainage using
a double J stent in Il cases, or Redon drain in 16 cases. The evaluab
le results for 25 patients with a mean follow-up of 11 months showed a
n overall success rate of 80%. This technique is the treatment of choi
ce for acquired stenosis and stage I and II congenital hydronephrosis
(Cendron).