title: Laparoscopic deroofing of nonparasitic liver cysts with or without greater omentum flap.
abstract: BACKGROUND
  Laparoscopic deroofing is the standard therapy for simple nonparasitic liver cysts. The operation is performed with or without a greater omentum flap sutured into the former cyst cavity. The aim of this study was to determine whether a greater omentum flap has influence on the recurrence rate of nonparasitic liver cysts during the long-term follow-up.
  
  
  METHODS
  From September 1999 to November 2009, 23 patients underwent laparoscopic deroofing for single or multiple nonparasitic symptomatic liver cysts. A greater omentum flap to fill the former cyst cavity was used in 8 patients, whereas in 15 patients operation was carried out without such an omentum flap. The patients were identified retrospectively and subject to a follow-up examination. The 2 groups of patients were compared according to the recurrence of the liver cysts.
  
  
  RESULTS
  The median follow-up time was 59±40 months. There was an overall recurrence rate of 4.3% (1 of 23), with 1 cyst recurrence in the greater omentum flap group (1 of 8). The Fisher exact test showed no difference in the recurrence rate between the 2 groups (P=0.35).
  
  
  CONCLUSIONS
  The overall recurrence rate is low. A greater omentum flap to prevent a local cyst recurrence after laparoscopic deroofing is dispensable and is a potential source of additional complications.
authors.affiliation: Department of General, Visceral and Cancer Surgery, University of Cologne, Cologne, Germany. roger.wahba@uk-koeln.de
authors.forename: Roger
authors.initials: R
authors.lastname: Wahba
authors.forename: Robert
authors.initials: R
authors.lastname: Kleinert
authors.forename: Klaus
authors.initials: K
authors.lastname: Prenzel
authors.forename: Christopher
authors.initials: C
authors.lastname: Bangard
authors.forename: Arnulf H
authors.initials: AH
authors.lastname: Hölscher
authors.forename: Dirk L
authors.initials: DL
authors.lastname: Stippel
mesh_terms: D000368:Aged; D003560:Cysts / Q000473:pathology / Q000601:surgery*; D005260:Female; D005858:Germany; D006801:Humans; D010535:Laparoscopy / Q000379:methods*; D008107:Liver Diseases / Q000473:pathology / Q000601:surgery*; D008297:Male; D015412:Mastectomy, Segmental / Q000295:instrumentation / Q000379:methods; D009852:Omentum / Q000473:pathology / Q000601:surgery*; D010532:Peritoneal Diseases / Q000473:pathology / Q000601:surgery*; D012008:Recurrence; D012189:Retrospective Studies; D016896:Treatment Outcome