我科1974～1982年间共收治大肠癌153例,其中多发性原发癌6例占3.9％。现结合本组病例对大肠多发性原发癌及有关问题进行讨论。临床资料本组6例男女之比为2:1,年龄在34～58岁之间。5例为双癌灶,1例为3癌灶。术中同时发现者4例,首次术后8年及3个月发现各1例。癌灶在左半结肠9个,右半结肠4个,其中乙状结 In 1974 and 1982, 153 cases of colorectal cancer were treated in our department, of which multiple primary cancers accounted for 3.9% of the cases. Now we combine this group of patients to discuss multiple primary cancers of the large intestine and related issues. The clinical data of this group of 6 cases of men and women was 2:1, aged 34 to 58 years old. Five cases were double foci and 1 case was 3 foci. Four patients were found during the operation and one case was found at the first 8 and 3 months after surgery. 9 lesions in the left colon and 4 in the right colon, with a sigmoid junction