Massironi S, Zilli A, Elvevi A, et al. [8]. Endoscopic view of tumor with central ulceration in the gastric body (A) and a large duodenal ulcer (B). ScientificWorldJournal. Prostate carcinoma metastatic to the stomach: report of two cases and review of the literature. Neuroendocrine Tumor of the Gastrointestinal Tract: Introduction. Gastrin immunostain is negative, indicating oxyntic mucosa with severe atrophy. Copyright PathologyOutlines.com, Inc. Click, 30100 Telegraph Road, Suite 408, Bingham Farms, Michigan 48025 (USA). This is an open access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. G-cells are located at the base of mucous neck cells and in the superficial mucous gland cells. 2010 Nov;34(11):1591-8 Guerini C, Lenti MV, Rossi C, Arpa G, Peri A, Gallotti A, Di Sabatino A, Vanoli A. After 6 months, the patient underwent surveillance EGD, and random biopsies were assessed with immunohistochemistry. Surg Clin N Am 2017;97:33343. PMC Department of Pathology Stanford University School of Medicine Stanford CA 94305-5342 . Exarchou K, Nathan Howes N, Pritchard DM. 2007 Fall;18(3):150-5. Gastric Cancer 2003;6:559. Valente P, Garrido M, Gullo I, Baldaia H, Marques M, Baldaque-Silva F, Lopes J, Carneiro F. Gastric Cancer.