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Gastric Adenoma: Its Concepts and Relation to “Atypical Epithelial Lesion” Yo Kato 1 1Department of Pathology, Cancer Institute pp.673-678
Published Date 1987/6/25
DOI https://doi.org/10.11477/mf.1403112894

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  • Abstract
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 “Adenoma” is a benign neoplasm arising from glandular epithelium. Although stable in biological behavior, it has a potential of evolving into cancer. Terms like “atypical epithelium” and “atypical epithelial lesion” have been used for more than 20 years to describe the lesion which could not be categorized into any of the following concepts; hyperplasia, regeneration and carcinoma. The lesions called “atypical epithelium” or “atypical epithelial lesion” have been considered to include “adenoma” as well. The most frequent one is the flat elevated lesion consisting of intestinal type epithelium. Atypical epithelial lesion is subclassified into two types, intestinal and gastric, according to the epithelium composing the lesion. Furthermore, these types are macroscopically subdivided into elevated, flat and depressed types. This article discussed which type or types of these “atypical epithelial lesion” are equivalent to adenoma in comparison with the characteristics of what is called adenoma everywhere in the body, particularly in the large intestine.

 The author considers that the term,“adenoma“ of the stomach, might be used for the protruded or elevated lesion (early gastric cancer type Ⅰ-like or type Ⅱa-like lesion) of intestinal type, and for some of the flat lesions of intestinal type and some of the protruded or elevated lesions of gastric type as well. But the term should not be used for the rest of the types of atypical epithelial lesion because the nature of these types remains to be clarified.


Copyright © 1987, 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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