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The Depth of Invasion of Colorectal Tumors from Endoscopic Viewpoints Koh Nagasako 1 1Institute of Gastroenterology, Tokyo Women's Medical College Keyword: 大腸癌 , 内視鏡診断 , sm-s癌 , sm-m癌 , 表面型起源癌 pp.1169-1182
Published Date 1993/10/25
DOI https://doi.org/10.11477/mf.1403106283
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 The depth of invasion of various types of colorectal tumors was studied endoscopically. Tumors were classified into the following five types; the pedunculated, sessile, superficial, creeping, and ulcerated types. About 30 consecutive lesions of each type with different invasivity such as adenoma, m cancer, sm cancer and advanced cancer were selected for this study.

 There was no sm cancer in the creeping type, and the ulcerated lesions were either sm-massive or advanced cancers. In the pedunculated type, the shape of head (round, depressed or scaled down), followed by the size of stalk, was the most important finding for the evaluation of invasivity. The pedunculated polyp with a depressed or scaled down head, particularly with a thick stalk suggested sm-massive cancer.

 The size of head of the lesions did not correlate the depth of invasion regardless of the shape of tumors. In the cases with sessile polyps, granular and fragile surface, or cancerous erosion was reliable signs for diagnosis of sm-massive or advanced cancers. Endoscopic rigidity and/or cancerous erosion were important signs of sm-massive cancer.


Copyright © 1993, 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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