大腸sm癌の検討-とくに脈管侵襲と簇出について-

概要

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We performed clinico-pathological studies on 30 lesions of submucosal carcinoma (SM), 134 lesions of adenoma, 18 lesions of mucosal carcinoma, and 50 lesions of invasive cancer limited to the layer of the muscularis propria (PM).<BR>SM was mostly 10-29 mm in size. Morphologically, PM was absent in the pedunculated group. In the sessile-central concavity (+) group, the depth of invasion of the tumor was greater than in submucosal carcinoma. In the sessile-central comcavity. (-) group, however, various lesions were mixed.<BR>The extent of vessel invasion differed according to the shape of tumors, as follows: pe-dunculated group, SM 40%; sessile-central concavity (-) group, SM 47%, PM 50% ; sessile-ceotral concavity (+) group, SM 100% and PM 100%.<BR>As for the relationship between vassel invasion and budding in SM, the proportion of lymphatic vassel invasion (+) of budding (+) was 80%, which was significantly higher than the lymphatic vessel invasion (+) of budding (-) at 15%. Budding was considered to be a useful finding in the sense of supplementing difficult-to-judge lymphatic vessel invasion.