title: Incidence of contralateral patent processus vaginalis in children with inguinal hernia.
abstract: OBJECTIVE
  The aim of this study was to investigate the incidence of contralateral patent processus vaginalis (PPV) in children with inguinal hernia using direct laparoscopic inspection.
  
  
  METHODS
  This study evaluates the incidence and size of contralateral PPVs in 143 children (96 boys, 47 girls) with clinically unilateral indirect inguinal hernia who underwent laparoscopic hernia repair. During repair, the contralateral internal inguinal ring was evaluated for PPV.
  
  
  RESULTS
  Boys with hernias on the right side had wide-open contralateral PPVs in 26% of cases compared with 11% in girls. Boys with hernias on the left side had wide-open contralateral PPVs in 30% of cases compared with 38% in girls. In all 4 groups, there were small contralateral openings in 15% to 20% of cases.
  
  
  CONCLUSIONS
  Contralateral PPV seems to occur less commonly than previously assumed.
authors.affiliation: Department of Paediatric Surgery, University Medical Centre Jena, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Schier
authors.forename: E
authors.initials: E
authors.lastname: Danzer
authors.forename: M
authors.initials: M
authors.lastname: Bondartschuk
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006552:Hernia, Inguinal / Q000601:surgery*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D010535:Laparoscopy; D008297:Male