title: Endopyelotomy in childhood: our experience with 37 patients.
abstract: OBJECTIVE
  To evaluate our experience and results with endopyelotomy in the pediatric population.
  
  
  METHODS
  Between 1990 and 2002, we performed percutaneous antegrade endopyelotomy under general anesthesia in 37 children because of ureteropelvic junction (UPJ) stricture. The youngest patient was 4.5 years and the oldest 17 years at the time of the procedure (mean age 11.5 years). One patient had bilateral stenosis; the two sides were operated on separately. After insertion of a 4F ureteral catheter and filling the collecting system with colored contrast material, a middle calix was punctured under fluoroscopic control. The tunnel was dilated to 26F by telescopic metal dilators. After insertion of a 0.035-inch gidewire through the UPJ, all its layers were cut by a cold knife in the dorsolateral direction so that the periureteral fatty tissue could be seen. Finally, the ureteral wound was stented by a 6F to 12F transrenal drain or a double-J catheter, which was removed after 6 weeks.
  
  
  RESULTS
  Among the 37 patients, the procedure had to be repeated in 1 because the transrenal drain stenting the UPJ slid back to the renal pelvis. We had to perform open pyeloplasty or nephrectomy in two patients because of bleeding or failed procedure. The average postoperative hospital stay was 6 days. Comparison of the preoperative intravenous urograms with studies performed 1 year after endopyelotomy showed an overall success rate of 89%. All patients are without complaints at the moment.
  
  
  CONCLUSIONS
  In experienced hands, endopyelotomy is a safe and effective method for the treatment of UPJ stricture, not only in the adult, but also in the pediatric, population.
authors.affiliation: Department of Urology, University of Debrecen Medical and Health Science Center, Debrecen, Hungary. btallai@freemail.hu
authors.forename: Béla
authors.initials: B
authors.lastname: Tállai
authors.forename: Morshed Ali
authors.initials: MA
authors.lastname: Salah
authors.forename: Tibor
authors.initials: T
authors.lastname: Flaskó
authors.forename: Csaba
authors.initials: C
authors.lastname: Tóth
authors.forename: Attila
authors.initials: A
authors.lastname: Varga
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003251:Constriction, Pathologic; D004724:Endoscopy; D005260:Female; D006801:Humans; D007682:Kidney Pelvis / Q000601:surgery; D008297:Male; D012189:Retrospective Studies; D014517:Ureteral Obstruction / Q000601:surgery*; D013520:Urologic Surgical Procedures / Q000379:methods*