A Comparative Study on Retrospective Evaluation of the Prognosis of the Colorectal Calcinomas Using New TNM and General Classifications

Masahiro Tsubaki, Katsuji Takemura, Masayuki Ando, Masanori Tada, Hironori Yamashita, Yasushi Wada, Naoya Murase, Mitsuo Endo

First Department of Surgery, Tokyo Medical and Dental University

We compared the new TNM classification (4th edition) by UICC and the Japanese Research Society (JRS) classification widely used in Japan. Both of them were assessed retrospectively by studying the records of 258 cases of cancer of the colon and rectum treated in our institute from 1974 to 1978. The new TNM classification was useful for predicting the outcome of cancers of the colon and rectum. However, it dose not include the evaluation of lymph-node metastasis. In this study, 5-year survival rates for subgroups of stage III were statistically different. The JRS classification was not useful for predicting the outcome of stage III and IV. In this study, 5-year survival rate for the sin0m0 cases including stage III was high (85.7%) and that of the n2.3 cases including stage IV was higher than that of the n1 cases including stage III. Both of the two classifications were meaning, but, they have many problems for predicting the outcome of cancers of colon and rectum.

Key words
colorectal carcinoma, TNM classification (4th edition), Dukes classification

Reprint requests
Masahiro Tsubaki First Department of Surgery, Tokyo Medical and Dental University
1-5-45 Yushima, Bunkyo-ku, Tokyo, 113 JAPAN

Accepted
April 17, 1991

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