title: Duodenal duplication cyst of the ampulla of Vater.
abstract: A 35-year-old man presented with the complaint of epigastric discomfort. Gastrointestinal endoscopy and endoscopic ultrasonography revealed a cystic lesion 20 mm in size at the ampulla of Vater. Endoscopic retrograde cholangiopancreatography (ERCP) revealed that the cystic lesion communicated with both the common bile duct and pancreatic duct via the common channel. Choledochocele was ruled out by close examination of the ERCP findings. The cystic lesion was surgically resected. Since histological findings revealed that the mucosa inside the lesion was duodenum-like and contained a layer of smooth muscle, the lesion was diagnosed as a congenital duplication cyst of the duodenum.
authors: Department of Gastroenterology, National Hospital Organization Iwakuni Clinical Center. tanaka@iwakuni-nh.go.jp
authors: Shouichi
authors: S
authors: Tanaka
authors: Motohiro
authors: M
authors: Goubaru
authors: Atsuyuki
authors: A
authors: Ohnishi
authors: Hideaki
authors: H
authors: Takahashi
authors: Hiroki
authors: H
authors: Takayama
authors: Teruya
authors: T
authors: Nagahara
authors: Masaya
authors: M
authors: Iwamuro
authors: Shigeru
authors: S
authors: Horiguchi
authors: Takeyuki
authors: T
authors: Ohta
authors: Ichiro
authors: I
authors: Murakami
mesh_terms: D000328:Adult; D014670:Ampulla of Vater / Q000473:pathology; D002760:Cholangiopancreatography, Endoscopic Retrograde; D015529:Choledochal Cyst / Q000175:diagnosis / Q000473:pathology; D003135:Common Bile Duct / Q000473:pathology; D003560:Cysts / Q000175:diagnosis* / Q000235:genetics / Q000473:pathology; D003937:Diagnosis, Differential; D004378:Duodenal Diseases / Q000175:diagnosis* / Q000235:genetics / Q000473:pathology; D004386:Duodenum / Q000002:abnormalities; D006801:Humans; D008297:Male; D010183:Pancreatic Ducts / Q000473:pathology