title: A systematic review of laparoscopic port site hernias in gastrointestinal surgery.
abstract: BACKGROUND
  Port site hernia is an important yet under-recognised complication of laparoscopic surgery, which carries a high risk of strangulation due to the small size of the defect involved. The purpose of this study was to examine the incidence, classification, and pathogenesis of this complication, and to evaluate strategies to prevent and treat it.
  
  
  METHODS
  Medline was searched using the words "port site hernia", "laparoscopic port hernia" "laparoscopic complications" and "trocar site hernias". The search was limited to articles on cholecystectomy, colorectal, bariatric or anti-reflux surgery published in English. A total of 42 articles were analysed and of these 35 were deemed eligible for review. Inclusion criteria were laparoscopic gastrointestinal surgery in English only with reported incidence of port site herniation. Studies were excluded if insufficient data was provided. Eligible studies were also cross-referenced.
  
  
  RESULTS
  Analysis of 11,699 patients undergoing laparoscopic gastrointestinal procedures demonstrated an incidence of port site hernias of 0.74% with a mean follow-up of 23.9 months. The lowest incidence of port site herniation was for bariatric surgery with 0.57% in 2644 patients with a mean follow-up of 67.4 months while the highest incidence was for laparoscopic colorectal surgery with an incidence of 1.47% in 477 patients with a mean follow-up of 71.5 months.
  
  
  CONCLUSIONS
  All fascial defects larger than or equal to 10mm should be closed with peritoneum, while smaller defects may require closure in certain circumstances to prevent herniation. Laparoscopic port site herniation is a completely preventable cause of morbidity that requires a second surgical procedure to repair.
authors.affiliation: Department of Surgery, St. Vincent's University Hospital, Dublin, Ireland.
authors.forename: M
authors.initials: M
authors.lastname: Owens
authors.forename: M
authors.initials: M
authors.lastname: Barry
authors.forename: A Z
authors.initials: AZ
authors.lastname: Janjua
authors.forename: D C
authors.initials: DC
authors.lastname: Winter
mesh_terms: D006555:Hernia, Ventral / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology; D006801:Humans; D015994:Incidence; D020706:Laparoscopes / Q000009:adverse effects*; D010535:Laparoscopy / Q000009:adverse effects*; D012307:Risk Factors; D014481:United States / Q000453:epidemiology