title: Long-term results of percutaneous endopyelotomy in the treatment of children with failed open pyeloplasty.
abstract: OBJECTIVE
  We reviewed our experience with the safety and long-term efficacy of percutaneous endopyelotomy in children with secondary ureteropelvic junction obstruction who previously underwent open pyeloplasty.
  
  
  METHODS
  Nine patients a median of 7 years old underwent endopyelotomy between June 1985 and July 1995. Anderson-Hynes pyeloplasty had previously been performed in all children. Antegrade endopyelotomy was done with a cold knife in conjunction with balloon dilation in some cases. Postoperative stenting lasted 6 weeks.
  
  
  RESULTS
  The median interval between pyeloplasty and endopyelotomy was 7.5 months. Mean operative time was 240 minutes. Percutaneous endopyelotomy was successful in 8 of the 9 patients. One patient who required repeat endopyelotomy after 4 years is presently well at 5 years of followup. Average followup was 5.6 years (range 2 to 10). There was a low morbidity rate, including 1 case of urinary tract infection, 1 of pneumonia and 1 that required blood transfusion.
  
  
  CONCLUSIONS
  Percutaneous antegrade endopyelotomy is a safe, effective and durable alternative for children who previously underwent unsuccessful pyeloplasty.
authors.affiliation: Department of Urology, Montreal Children's Hospital, Quebec, Canada.
authors.forename: G
authors.initials: G
authors.lastname: Capolicchio
authors.forename: Y L
authors.initials: YL
authors.lastname: Homsy
authors.forename: A M
authors.initials: AM
authors.lastname: Houle
authors.forename: A
authors.initials: A
authors.lastname: Brzezinski
authors.forename: L
authors.initials: L
authors.lastname: Stein
authors.forename: M M
authors.initials: MM
authors.lastname: Elhilali
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004724:Endoscopy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006869:Hydronephrosis / Q000601:surgery*; D007682:Kidney Pelvis / Q000601:surgery*; D008297:Male; D013997:Time Factors; D017211:Treatment Failure; D014517:Ureteral Obstruction / Q000601:surgery*