title: Haemorrhage into a duodenal cyst with ectopic gastric epithelium, a rare cause of gastric outlet obstruction in an adult.
abstract: BACKGROUND
  Duodenal duplications, including also cysts with gastric epithelium, are congenital anomalies observed in less than 1 per 100,000 births. They are usually detected in infants or children.
  
  
  OBJECTIVE
  To evaluate and discuss the diagnostic work-up and treatment.
  
  
  METHODS
  A rare case of haemorrhage in the duodenal cyst in a 32-year-old woman with gastric outlet obstruction is presented.
  
  
  RESULTS
  Computed tomography (CT) revealed cystic lesion in the duodenum. Endoscopic retrograde cholangiopancreatography (ERCP) showed normal biliary and pancreatic ducts. Final histology demonstrated cystic lesion in the duodenum which was lined with gastric mucosa.
  
  
  CONCLUSIONS
  Preoperative CT and ERCP are important in the differential diagnosis and planning of treatment in duodenal cystic lesions.
authors.affiliation: Department of Surgery, Tampere University Hospital, Finland.
authors.forename: J
authors.initials: J
authors.lastname: Sand
authors.forename: M
authors.initials: M
authors.lastname: Matikainen
authors.forename: A
authors.initials: A
authors.lastname: Harmoinen
authors.forename: I
authors.initials: I
authors.lastname: Nordback
mesh_terms: D000328:Adult; D002760:Cholangiopancreatography, Endoscopic Retrograde; D003560:Cysts / Q000150:complications* / Q000473:pathology / Q000601:surgery; D003937:Diagnosis, Differential; D004378:Duodenal Diseases / Q000150:complications* / Q000473:pathology / Q000601:surgery; D004386:Duodenum / Q000002:abnormalities / Q000473:pathology; D005260:Female; D005753:Gastric Mucosa; D017219:Gastric Outlet Obstruction / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D006471:Gastrointestinal Hemorrhage / Q000150:complications* / Q000473:pathology / Q000601:surgery; D006801:Humans; D014057:Tomography, X-Ray Computed