大肠癌为我国常见的恶性肿瘤。据李冰氏等1980年的统计,占我国恶性肿瘤死亡率的第6位。1978年日本统计,大肠癌占全部日本恶性肿瘤死亡率的第3位。早期大肠癌的定义虽尚未完全确定,据日本1975年第2次大肠癌研究会的讨论,将癌局限于大肠粘膜层(M 癌)和粘膜下层(SM 癌)者称为早期大肠癌较被公认。本文即据此作为诊断 Colorectal cancer is a common malignancy in China. According to statistics by Li Bing et al. in 1980, it accounted for the sixth highest mortality rate of malignant tumors in our country. In 1978 in Japan, colorectal cancer accounted for the third highest mortality rate of all malignant tumors in Japan. Although the definition of early colorectal cancer has not yet been fully established, according to the discussion of the 2nd Large Intestine Cancer Research Society in Japan in 1975, the patients with cancer limited to the large intestine mucosal layer (M cancer) and submucosa (SM cancer) are referred to as early colorectal cancer. accepted. This article is based on this diagnosis