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High Risk Group of the Gastric Carcinogenesis from the Pathological Point of View : with Special Reference to Mucin Phenotypic Expression of the Carcinoma and Its Background Mucosa Takashi Yao 1 , Hiroya Ueyama 1 , Minako Hirahashi 2 1Department of Human Pathology, Juntendo University School of Medicine, Tokyo 2Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan Keyword: 胃癌 , 腸上皮化生 , 背景粘膜 , 粘液形質 pp.1423-1431
Published Date 2009/8/25
DOI https://doi.org/10.11477/mf.1403101740
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 We reviewed the association between gastric carcinogenesis and background mucosa, especially focused on mucin phenotypic expression.

 From the analysis of minute carcinomas and multiple ones, the presence of intestinal metaplasia(IM) is considered to be a carcinogenetic risk factor for differentiated carcinoma, but rather than being a precancerous lesion it is a paracancerous lesion.

 From the analysis of carcinomas arising in young patients from the mucosa without IM, IM is considered to have no relation to carcinogenesis of undifferentiated carcinoma. IM is also considered to have no relation to the carcinogenesis of carcinoma arising in the remnant stomach after partial gastrectomoy for benign disease, in which the presence of reflux gastritis is an important risk factor for carcinogenesis. This can be said also about carcinoma arising in hyperplastic polyp. On the other hand, IM is considered to be a carcinogenetic risk factor for carcinoma arising in the remnant stomach after partial gastrectomoy for carcinoma, the same can be said about synchronous multiple gastric carcinomas.

 Although IM(presence of intestinal phenotype)is considered unlikely to be a precancerous lesion, the presence of IM should be regard as important for assessing carcinogenetic risk. In case of carcinoma arising from mucosa without IM, inflammation induced by H. pylori infection and/or reflux of intestinal juice are suggested to be carcinogenetic risk factors. Therefore, the carcinogenetic risk of the background mucosa should be evaluated by combination of presence of IM, inflammation and chemical stimulation.


Copyright © 2009, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院

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