title: A case of a duodenal duplication cyst presenting as melena.
abstract: Duodenal duplication cysts are benign rare congenital anomalies reported mainly in the pediatric population, but seldom in adults. Symptoms depend on the type and location and can present as abdominal pain, distension, dysphagia or dyspepsia. They have been reported to be responsible for duodenal obstruction, pancreatitis and, in rare cases, gastrointestinal bleeding. We present a case of a duodenal duplication cyst in a 43-year-old man presenting as melena. Initial gastroduodenoscopy and colonoscopy did not reveal any bleeding focus. However, the patient began passing melena after 3 d, with an acute decrease in hemoglobin levels. Subsequent studies revealed a duplication cyst in the second portion of the duodenum which was surgically resected. Histology revealed a duodenal duplication cyst consisting of intestinal mucosa. There was no further bleeding and the patient recovered completely. In rare cases, duodenal duplication cysts might cause gastrointestinal bleeding and should be included in the differential diagnosis.
authors.affiliation: Seung Yeon Ko, Department of General Surgery, College of Medicine, The Catholic University of Korea, Seoul 137-701, South Korea.
authors.forename: Seung Yeon
authors.initials: SY
authors.lastname: Ko
authors.forename: Sun Hye
authors.initials: SH
authors.lastname: Ko
authors.forename: Sungeun
authors.initials: S
authors.lastname: Ha
authors.forename: Mi Sung
authors.initials: MS
authors.lastname: Kim
authors.forename: Hyang Mi
authors.initials: HM
authors.lastname: Shin
authors.forename: Myong Ki
authors.initials: MK
authors.lastname: Baeg
mesh_terms: D000328:Adult; D003560:Cysts / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D004378:Duodenal Diseases / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D016099:Endoscopy, Gastrointestinal; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D007443:Intussusception / Q000175:diagnosis / Q000209:etiology*; D008297:Male; D008551:Melena / Q000209:etiology*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
keywords: Duodenum; Duplication; Gastrointestinal hemorrhage