title: [Spontaneous recanalization of the vas deferent after vasectomy: report of 2 new cases. Bibliographic review].
abstract: OBJECTIVE
  Vasectomy is a low morbidity and high efficacy surgical method. A small percentage of cases may have paternity after surgery as a complication.
  
  
  METHODS
  We reviewed all patients who underwent vasectomy at our department from 1995 to 1999 (n = 1492), defining technical failure as pregnancy or no disappearance of spermatozoids in the follow-up sperm analysis.
  
  
  RESULTS
  We found 2 cases; one of them did not have a negative sperm test after three months, the other one's wife became pregnant after previous azoospermia. Both patients showed granulomas in the pathologic report after a second operation.
  
  
  CONCLUSIONS
  Vasectomy is a surgical technique that may have a failure rate close to 2%. Paternity after the operation may appear even after several years. Several authors report the existence of granulomas in those cases in which spontaneous recanalization appears. In our series it was a constant.
authors.affiliation: Servicio de Urología, Hospital General Universitario, Valencia, España. jacanovas@hotmail.com
authors.forename: José Antonio
authors.initials: JA
authors.lastname: Cánovas Ivorra
authors.forename: Alfredo
authors.initials: A
authors.lastname: Tramoyeres Galvañ
authors.forename: Francisco
authors.initials: F
authors.lastname: Sánchez Ballester
authors.forename: Francisco
authors.initials: F
authors.lastname: Ramada Benlloch
authors.forename: Luis
authors.initials: L
authors.lastname: De la Torre Abril
authors.forename: Felipe
authors.initials: F
authors.lastname: Ordoño Domínguez
authors.forename: Pedro
authors.initials: P
authors.lastname: Navalón Verdejo
authors.forename: Julio
authors.initials: J
authors.lastname: Zaragoza Orts
mesh_terms: D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D017211:Treatment Failure; D014659:Vasectomy