title: A Patient with Duodenal Mucinous Adenocarcinoma Presenting as a Laterally Spreading Tumor.
abstract: Primary duodenal carcinoma is rare. Duodenal mucinous adenocarcinoma (DMA) is even rarer, and its associated manifestations and typical endoscopic or imaging findings are not well characterized. Herein, we report a case of primary DMA in an asymptomatic 58-year-old man who visited our hospital for a regular health screening. Upper endoscopy revealed an approximately 4-cm lesion in the second portion of the duodenum, but the mass was not visualized on computed tomography. Biopsies revealed a tubular adenoma that was subsequently resected. Frozen biopsies demonstrated DMA with a background of low-grade tubular adenoma for which we performed Roux-en-Y duodenojejunostomy and jejunojejunostomy. To our knowledge, this is the first report of a patient with DMA in Korea.
authors.affiliation: Department of Gastroenterology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Myung Joon
authors.initials: MJ
authors.lastname: Chae
authors.affiliation: Department of Gastroenterology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Il Hyun
authors.initials: IH
authors.lastname: Baek
authors.affiliation: Department of Gastroenterology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Yu Mi
authors.initials: YM
authors.lastname: Oh
authors.affiliation: Department of Gastroenterology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Jun Uk
authors.initials: JU
authors.lastname: Lim
authors.affiliation: Department of Gastroenterology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Jung Won
authors.initials: JW
authors.lastname: Jeon
authors.affiliation: Department of Gastroenterology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Hyun Phil
authors.initials: HP
authors.lastname: Shin
authors.affiliation: Department of Gastroenterology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Kwang Ro
authors.initials: KR
authors.lastname: Joo
authors.affiliation: Department of Gastroenterology, Kyung Hee University Hospital at Gangdong, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Joung Il
authors.initials: JI
authors.lastname: Lee
keywords: Adenocarcinoma; Adenoma; Duodenal neoplasms; Mucinous