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Natural History of Gastric Carcinoma: from Analyses of Microcarcinoma Hidenobu Watanabe 1 1The First Department of Pathology, Niigata University School of Medicine Keyword: 低異型度癌 , 高異型度癌 , 微小胃癌 , 胃癌の生長 , 増殖浸潤能 pp.59-67
Published Date 1992/1/25
DOI https://doi.org/10.11477/mf.1403106677
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 Grading of histological, especially cytological atypia is very important for understanding the natural history or growth of gastric carcinoma, as well as histological typing, depth of invasion, vascular permeation, and host reactions. Generally speaking, gastric carcinoma, especially early carcinoma, is divided into two histological or cytological grades; low-grade carcinoma and high-grade carcinoma. The latter shows rapid growth rate and high ability of submucosal invasion.

 One hundred and forty nine gastric microcarcinomas were grouped into low-grade carcinomas (84 tumors) and high-grade carcinomas (61 tumors). The ratio (low: high) was 64:55 in differentiated type, intestinal type carcinoma, 14:2 in differentiated type, gastric foveolar type carcinoma, and 10:4 in undifferentiated type (diffuse or infiltrating type) carcinoma. The high-grade microcarcinoma revealed a higher ability of submucosal invasion, and high labeling index and diffuse distribution of PCNA positive cells.

 It is concluded that gastric carcinomas already show a different natural history even at the stage of microcarcinoma.


Copyright © 1992, 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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