Endoscopic Diagnosis of the Gastric Cancer Showing the Features of a Submucosal Tumor Atsushi Mitsunaga 1 , Sachiko Futami 3 , Youko Murata 1 , Kou Nagasako 1,2 , Shigeru Suzuki 1 1Department of Gastrointestinal Endoscopy, Tokyo Women's Medical College 3Department of Gastroenterology, Institute of Gastroenterology, Tokyo Women's Medical College Keyword: 粘膜下腫瘍 , 未分化型腺癌 , 膠様腺癌 , 内視鏡診断 pp.769-776
Published Date 1995/5/25
DOI https://doi.org/10.11477/mf.1403105427
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 Using endoscopy, we studied from 1985 to 1994, 16 cases of gastric cancers which were diagnosed as showing the features of Submucosal tumors (SMT) at their margins. In those cases, there were only three cases in which the area of the cancer in the mucosa was within 10% of the area in the submucosa. There was only one case which showed the typical features of a SMT. A report of this case was published in this journal in 1989. This present study confirmed that typical features, of SMT are rarely found in gastric cancers. In such gastric cancers as were diagnosed as showing features of a SMT, the cancer in the submucosal layer was most commonly undifferentiated adenocarcinoma (68.8%), so we regard it as important to diagnose the structures found by endoscopy in the submucosal layer as tumors like SMT. Moveover, we have compared such gastric cancers with sessile colon cancer invading the submucosa. Nagasako thinks that much sessile colon cancer originates as a superficial lesion. It also shows the features of a submucosal tumor. This comparison leads us to think that if gastric cancer develops showing the features of a SMT, it must have an intense inclination to invade to deep layers and to exist on the thin part of the muscularis mucosa, and which it destroys in the very early phase of its growth.

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