title: Endoscopic ultrasound-guided sampling of a metastatic mucinous adenocarcinoma mimicking a gastric subepithelial tumor.
abstract: Metastatic mucinous adenocarcinoma of appendix origin and mimicking a gastric subepithelial tumor (SET) is very rare. Endoscopic ultrasound (EUS)-guided sampling is a useful diagnostic method for SETs. However, the cytologic findings of metastatic mucinous adenocarcinoma are unfamiliar to many pathologists and gastroenterologists. These findings present a diagnostic challenge because the introduction of gastric epithelium and mucin into the specimen during the procedure can be misleading. This is the first reported experience of an EUS-guided sampling of a gastric SET in a patient with suspected appendiceal tumor, to make the diagnosis of a mucinous adenocarcinoma.
authors.affiliation: Department of Internal Medicine, Digestive Disease Center, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
authors.forename: Dae Chul
authors.initials: DC
authors.lastname: Seo
authors.affiliation: Institute for Digestive Research, Digestive Disease Center, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
authors.forename: Tae Hee
authors.initials: TH
authors.lastname: Lee
authors.affiliation: Department of Pathology, Soonchunhyang University College of Medicine, Seoul, Korea.
authors.forename: Yoon Mi
authors.initials: YM
authors.lastname: Jeen
authors.affiliation: Institute for Digestive Research, Digestive Disease Center, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
authors.forename: Hyun Gun
authors.initials: HG
authors.lastname: Kim
authors.affiliation: Institute for Digestive Research, Digestive Disease Center, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
authors.forename: Eui Bae
authors.initials: EB
authors.lastname: Kim
authors.affiliation: Department of Oncology, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
authors.forename: Sang Cheol
authors.initials: SC
authors.lastname: Lee
keywords: Adenocarcinoma, mucinous; Appendix; Biopsy, fine-needle; Endosonography; Stomach