Gastric collision tumor (carcinoid and adenocarcinoma) with gastritis cystica profunda
Morishita, Y.; Tanaka, T.; Kato, K.; Kawamori, T.; Amano, K.; Funato, T.; Tarao, M.; Mori, H.
Archives of Pathology and Laboratory Medicine 115(10): 1006-1010
1991
ISSN/ISBN: 0003-9985 PMID: 1898226 Document Number: 380604
We report a rare case of gastric collision tumor (carcinoid and adenocarcinoma) with gastritis cystica profunda that developed in a 49-year-old Japanese man. Early gastric cancer (moderately differentiated tubular adenocarcinoma) was present at the edge of an ulcer in the posterior wall of the upper gastric body. In addition, a carcinoid tumor was found adjacent to adenocarcinoma. This tumor displayed ribbonlike or trabecular patterns, and numerous constitutent cells were positive for the argyrophil reaction with Grimelius' stain and serotonin. Electron microscopic features of this tumor confirmed typical carcinoid. There was no merged appearance between both tumors, suggesting collission-type tumor.