title: False-positive cytology in diagnostic laparoscopy due to ectopic pancreas.
abstract: BACKGROUND
  Report on a case of incorrect diagnosis after laparoscopy and peritoneal fluid sampling.
  
  
  METHODS
  Case description and literature review.
  
  
  RESULTS
  Diagnostic laparoscopy is a frequently used tool. In a patient with chronic abdominal pain, a diagnostic laparoscopy was performed, and a peritoneal fluid sample was taken. Cytology of the aspirated peritoneal fluid revealed an adenocarcinoma. At laparotomy, ectopic pancreas was found as the source of the false-positive cytology.
  
  
  CONCLUSIONS
  In the diagnosis of adenocarcinomas from peritoneal fluid aspirates without an obvious clinical location (tumor), ectopic pancreatic tissue should be considered in the differential diagnosis.
authors.affiliation: Department of Surgery, University Hospital Maastricht, Maastricht, The Netherlands.
authors.forename: C E
authors.initials: CE
authors.lastname: Sloots
authors.forename: L M
authors.initials: LM
authors.lastname: de Brauw
authors.forename: F J
authors.initials: FJ
authors.lastname: Bot
authors.forename: J W
authors.initials: JW
authors.lastname: Greve
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology; D000328:Adult; D001202:Ascitic Fluid / Q000166:cytology; D002828:Choristoma / Q000473:pathology*; D003951:Diagnostic Errors; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D010535:Laparoscopy; D010179:Pancreas; D013272:Stomach Diseases / Q000473:pathology*; D013274:Stomach Neoplasms / Q000473:pathology