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Histopathological Analysis of m, sm and pm Cancer of the Large Bowel S. Tanaka 1 , T. Nakamura 1 , E. Sato 1 1The Second Department of Pathology, School of Medicine, Kagoshima University pp.349-356
Published Date 1982/3/25
DOI https://doi.org/10.11477/mf.1403108824
  • Abstract
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 The pattern of invasion (spread) of colonic carcinoma involving the muscularis propria (pm cancer), especially the development of pm cancer from m cancer or sm cancer is investigated. The cases of m cancer (23 cases), sm cancer (42 cases) and pm cancer (72 cases) are analysed with regard to the presence or absence of the stalk and/or adenomas and the features of the muscularis mucosae.

 The features of the muscularis mucosae are divided into a narrowing type, intermediate type, broad base type and wavy-tortuous type. The wavy-tortuous type occurs with a concomitant sessile-type adenoma.

 In the m cancer, most of the cases are of the narrowing type which is characterized by a fountain-like elevation of the muscularis mucosae. In the sm cancer, it is partly replaced by the intermediate and broad base types, while in the pm cancer, the broad base type is predominant (60/72). The wavy-tortuous pattern (type) is observed in all three depths of invasion. Concomitant adenomas are recognized in 91.3% cases of m cancer, 73.8% of sm cancer and 26.4% of pm cancer. Based on these observations, it could be considered that many of pm carcinomas may develop from adenoma, showing a transition to the broad base type from the narrowing type via the intermediate type. The pm cancer may also develop from the m or sm cancer which has retained a wavy-tortuous type pattern. Regarding the low frequency of concomitant ademomas, however, the possibility of de novo cancer formation in the broad base type cannot be neglected totally.


Copyright © 1982, 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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