I. Diagnosis of Depth of Cancerous Invasion by Macroscopical Findings in Colorectal Cancer

概要

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One hunderd and one lesions of colorectal carcinoma resected surgically in the Ceter for Adult Diseases, Osaka, were studied on macroscopical diagnosis of the depth of cancerous invasion.<BR>When the diameter of the malignant lesions becomes longer, cancer invaded deeper into the colorectal wall; the lesions of less than 2cm in diameter revealed superficial carcinoma, and the lesions of more than 7cm showed cancerous invasion in deeper layer than subserosa (ss). Shape of the lesion correlated to the depth of cancerous invasion in order of pedunculate, sessile, and protruded lesions; cancerous invasion of pedunculate lesion limited in mucosa (m) or submucosa (sm), that of sessile lesion was into sm or proper muscle layer (pm), and that of protruded lesion was into pm or ss. Cancerous invasion into the deeper layer was more observed in the lesion with depression than in the lesion without depression, and in the deep depression than in the shallow depression. The most of lesions in which bottom level of the depression was deeper than level of surrounding mucosa was deeply invasive cancer. Many lesions with convergence had the deep invasion of cancer, and the lesion accompanied with marked convergence was found the cancer invaded into serosa (s).<BR>Finally, by means of combinations of these findings, cancer invasion was easily estimated into the layers of the colorectal wall.
日本大腸肛門病学会の論文