title: Serrated Adenoma of Gastric Antrum: Alteration of Mucin Expression Profile and its Role in Carcinogenesis.
abstract: Serrated adenomas usually occur in colon, the gastric localization is extremely rare. These polyps have their own carcinogenetic pathway with microsatellite instability. In this report, we present a serrated adenoma localized in gastric antrum with four control endoscopies and biopsies. Immunohistochemical panel of MUC1, MUC2, MUC5AC, and MUC6 was applied to the biopsies. Serrated component, MUC 2 expression increased but goblet cells and MUC5AC expression decreased in follow-up biopsies. This lesion probably was originated from a stem cell that had the potential of differentiation in gastric and intestinal way. This might result an incomplete metaplasia for both colon and stomach. Such lesions which originate from either colon or gastric mucosa may be precancerous and their carcinogenetic pathway may not represent its original organ.
authors.affiliation: Department of Pathology, Kocaeli University Medical Faculty, Umuttepe Kampusu Kocaeli-Turkey.
authors.forename: Yesim
authors.initials: Y
authors.lastname: Gurbuz
authors.affiliation: Department of Gastroenterology, Kocaeli University Medical Faculty, Umuttepe Kampusu Kocaeli, Turkey.
authors.forename: Cem
authors.initials: C
authors.lastname: Aygun
authors.affiliation: Department of Pathology, Kocaeli University Medical Faculty, Umuttepe Kampusu Kocaeli-Turkey.
authors.forename: Gupse
authors.initials: G
authors.lastname: Turan
keywords: Gastric polyp; Immunohistochemistry; Serrated adenoma