title: [Role of retrograde endoscopic dilatation with balloon and derivation using double pig-tail catheter as an initial treatment for vesico-ureteral junction stenosis in children].
abstract: The purpose of this project is to determine the role of the retrogade endoscopic dilatation with balloon and derivation using double pig-tail catheter, as inicial treatment for the vesicoureteral junction stenosis in children. As there are no previous paediatric publications, we present the technical details and early results. From August 1994 to December 1995, we have treated 11 children (8 boys and three girls), whose ages were between 4 months and eleven years, with objectivated vesicoureteral stenosis. Six of which were primary obstructive megaureters, and the other five were secondary obstructive megaureters (two were secondary to posterior urethral valves, one to neurogenic bladder, another one to ectopic ureter, and the last one was secondary to previous antirreflux surgery). We have used rigid dilatators and 7 Fr balloons over guide. All the patients have improved from their obstruction (proved by renogram). In six of the cases only one dilatation was needed, and in the other five only two dilatations. Only two patients presented reflux (grade I and IV).
  
  
  CONCLUSIONS
  The endoscopic dilatation of the obstructive megaureter in children is possible, and reflux is rare.
authors.affiliation: Hospital Universitario Puerta del Mar, Cádiz.
authors.forename: J M
authors.initials: JM
authors.lastname: Angulo
authors.forename: R
authors.initials: R
authors.lastname: Arteaga
authors.forename: J
authors.initials: J
authors.lastname: Rodríguez Alarcón
authors.forename: M J
authors.initials: MJ
authors.lastname: Calvo
mesh_terms: D002404:Catheterization / Q000379:methods*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D014517:Ureteral Obstruction / Q000175:diagnosis* / Q000628:therapy*; D014546:Urinary Catheterization / Q000379:methods*
vernacular_title: Papel de la dilatación endoscópica y derivación con catéter doble "J" en el megauréter obstructivo en la infancia.