大肠癌为我国常见癌肿之一。上海市1963年发病率为6.66/10万/年,而1979年为20.37/10万/年,占全部癌肿的8.9%,发病率有明显上升的趋势。虽然其预后较肝、胃、肺之癌肿为好,但由于确诊不及时,总的5年生存率仍徘徊于30%左右,根治术后5年生存率仅50%左右。确诊者属Ⅲ期的占65%。以一 Colorectal cancer is one of the common cancers in China. The incidence rate of Shanghai in 1963 was 6.66 per 100 000 per year, compared with 20.37 per 100,000 per year in 1979, which accounted for 8.9% of all cancers. The incidence rate has increased significantly. Although the prognosis is better than that of liver, stomach, and lung cancer, the overall 5-year survival rate is still limited to 30% due to untimely diagnosis, and the 5-year survival rate after radical resection is only about 50%. The diagnosed person is 65% of stage III. In a