title: Systematic review and meta-analysis of prophylactic gastroenterostomy for unresectable advanced pancreatic cancer.
abstract: BACKGROUND
  The value of prophylactic gastroenterostomy (usually combined with a biliary bypass) in patients with unresectable cancer of the pancreatic head is controversial.
  
  
  METHODS
  A systematic review of retrospective and prospective studies, and a meta-analysis of prospective studies, on the use of prophylactic gastroenterostomy for unresectable pancreatic cancer were performed.
  
  
  RESULTS
  Analysis of retrospective studies did not reveal any advantage or disadvantage of prophylactic gastroenterostomy. Three prospective studies comparing prophylactic gastroenterostomy plus biliodigestive anastomosis with no bypass or a biliodigestive anastomosis alone were identified (altogether 218 patients). For patients who had prophylactic gastroenterostomy, the chance of gastric outlet obstruction during follow-up was significantly lower (odds ratio (OR) 0.06 (95 per cent confidence interval (c.i.) 0.02 to 0.21); P < 0.001). The rates of postoperative delayed gastric emptying were similar in both groups (OR 1.93 (95 per cent c.i. 0.57 to 6.53); P = 0.290), as were morbidity and mortality. The estimated duration of hospital stay after prophylactic gastroenterostomy was 3 days longer than for patients without bypass (weighted mean difference 3.1 (95 per cent c.i. 0.7 to 5.5); P = 0.010).
  
  
  CONCLUSIONS
  Prophylactic gastroenterostomy should be performed during surgical exploration of patients with unresectable pancreatic head tumours because it reduces the incidence of long-term gastroduodenal obstruction without impairing short-term outcome.
authors.affiliation: Department of Surgery, Technische Universität München, Munich, Germany.
authors.forename: N
authors.initials: N
authors.lastname: Hüser
authors.forename: C W
authors.initials: CW
authors.lastname: Michalski
authors.forename: T
authors.initials: T
authors.lastname: Schuster
authors.forename: H
authors.initials: H
authors.lastname: Friess
authors.forename: J
authors.initials: J
authors.lastname: Kleeff
mesh_terms: D004812:Epidemiologic Methods; D017219:Gastric Outlet Obstruction / Q000517:prevention & control*; D005763:Gastroenterostomy / Q000379:methods*; D006801:Humans; D007902:Length of Stay; D010190:Pancreatic Neoplasms / Q000601:surgery*; D011788:Quality of Life; D016896:Treatment Outcome