title: Pancreatic arteriovenous malformation involving adjacent duodenum with gastrointestinal bleeding: report of a case.
abstract: A 54-year-old man was admitted to our hospital with the symptoms of palpitation, dyspnea, and tarry stool. Upper gastroduodenal endoscopy revealed submucosal lesions with vascular ectasia in the second part of the duodenum. Dynamic computed tomography (CT) detected a hypervascular lesion in the pancreatic head and the duodenum. Selective angiography showed proliferation of a vascular network and early filling of the portal vein at the early arterial phase. With a diagnosis of pancreatic arteriovenous malformation (AVM), we performed pylorus-preserving pancreaticoduodenectomy. At laparotomy, localized and meandering vessels were seen on the surface of the head of the pancreas. Histological examination showed dilated tortuous vessels accompanied by severed elastic fibers in the vessel media and blood clot formation. The incidence of pancreatic AVM remains extremely low, and recurrent gastrointestinal bleeding is a frequent complication. To prevent recurrent bleeding and progressive portal hypertension, surgery may be the definitive management of symptomatic AVM.
authors.affiliation: Surgery for Organ Function and Biological Regulation, Nippon Medical School Graduate School of Medicine, Tokyo, Japan. uchida@nms.ac.jp
authors.forename: Eiji
authors.initials: E
authors.lastname: Uchida
authors.forename: Takayuki
authors.initials: T
authors.lastname: Aimoto
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Akira
authors.initials: A
authors.lastname: Katsuno
authors.forename: Kazumitsu
authors.initials: K
authors.lastname: Chou
authors.forename: Masao
authors.initials: M
authors.lastname: Kawamoto
authors.forename: Shinpei
authors.initials: S
authors.lastname: Ono
authors.forename: Nobuaki
authors.initials: N
authors.lastname: Ishii
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Miyake
authors.forename: Shunji
authors.initials: S
authors.lastname: Fujimori
authors.forename: Choitsu
authors.initials: C
authors.lastname: Sakamoto
authors.forename: Takashi
authors.initials: T
authors.lastname: Tajiri
mesh_terms: D001165:Arteriovenous Malformations / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D004386:Duodenum / Q000098:blood supply*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology* / Q000517:prevention & control; D006801:Humans; D006975:Hypertension, Portal / Q000209:etiology / Q000517:prevention & control; D008297:Male; D008875:Middle Aged; D010179:Pancreas / Q000098:blood supply*; D016577:Pancreaticoduodenectomy / Q000379:methods; D055502:Secondary Prevention