title: [Inverted Hyperplastic Polyp in Stomach: A Case Report and Literature Review].
abstract: An inverted hyperplastic polyp (IHP) found in stomach is rare and characterized by downward growth of hyperplastic mucosal component into the submucosa. Because of such characteristic, IHP can be misdiagnosed as subepithelial tumor or malignant tumor. In fact, adenocarcinoma was reported to have coexisted with gastric IHP in several previous reports. Because only 18 cases on gastric IHP have been reported in English and Korean literature until now, pathogenesis and clinical features of gastric IHP and correlation with adenocarcinoma have not been clearly established. Herein, we report a case of gastric IHP which was initially misdiagnosed as gastrointestinal stromal tumor and resected using endoscopic submucosal dissection. Literature review of previously published case reports on gastric IHP is also presented.
authors.affiliation: Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
authors.forename: Yeon Ho
authors.initials: YH
authors.lastname: Lee
authors.affiliation: Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
authors.forename: Moon Kyung
authors.initials: MK
authors.lastname: Joo
authors.affiliation: Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
authors.forename: Beom Jae
authors.initials: BJ
authors.lastname: Lee
authors.affiliation: Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
authors.forename: Ji-Ae
authors.initials: JA
authors.lastname: Lee
authors.affiliation: Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
authors.forename: Taehyun
authors.initials: T
authors.lastname: Kim
authors.affiliation: Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
authors.forename: Jin Gu
authors.initials: JG
authors.lastname: Yoon
authors.affiliation: Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
authors.forename: Jung Min
authors.initials: JM
authors.lastname: Lee
authors.affiliation: Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea.
authors.forename: Jong-Jae
authors.initials: JJ
authors.lastname: Park
mesh_terms: D000328:Adult; D005753:Gastric Mucosa / Q000473:pathology / Q000601:surgery; D006801:Humans; D006965:Hyperplasia / Q000175:diagnosis* / Q000000981:diagnostic imaging; D008297:Male; D011127:Polyps / Q000473:pathology / Q000601:surgery; D013270:Stomach / Q000000981:diagnostic imaging; D013274:Stomach Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography
keywords: Endoscopic submucosal dissection; Inverted hyperplastic polyp; Stomach