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Study was made on the correlation between the prognosis and the individual factors as histological type, of the cancer developments, depth of cancer invasion and lymphnode metastasis, in the 30 cases of anal cancer. Of 30 resected specimens, histologically 9 cases were squamous cell carcinomas, 19 cases were adenocarcinomas and mucinous carcinomas, and then adenosquamous carcinoma and basaloid cell carcinoma were recognized in one case respectively. The 5 years survival rate was 100% for cases with sqamous cell carcinoma, 80% for cases with adenocarcinoma, and 0 % for cases with mucinous carcinoma which performed curative operation. For the type of cancer developments, extracanal type was grave in prognosis which invades submucosal layer or subcutaneous layer. For the depth of cancer invasion, we experienced only 3 cases of pm cancer and the prognosis was favorable. There was no difference in prognosis between a, and a2, but the case of ai was evidently grave in prognosis. Lymphnode metastasis was the most reflected factor to determine the prognosis. Regarding to the lymphatic infiltrations, no and nl cases were favorable in prognosis, but in the cases of highly lymphatic infiltration prognoses were grave, especially in the cases which invades inguinal lymphnodes.
日本大腸肛門病学会の論文