大肠癌是常见的恶性肿瘤 ,由于大肠癌的发病可能和高脂肪 ,低纤维素饮食有关 ,所以发达国家的发病率较高 ,我国的发病率近年来也有所上升。和任何恶性肿瘤一样 ,早期发现 ,早期治疗是提高大肠癌远期生存率的唯一途径 ,如按 Dukes分期 ,5年生存率 ,A期可达 90± % ,B期降为 75± Colorectal cancer is a common malignant tumor. Since the incidence of colorectal cancer may be related to a high-fat, low-fiber diet, the incidence of colorectal cancer is high in developed countries. The incidence of colorectal cancer in China has also risen in recent years. As with any malignant tumor, early detection and early treatment are the only ways to improve the long-term survival rate of colorectal cancer. According to the Dukes staging, the 5-year survival rate can reach 90 ±% in A phase and 75 ± B in B phase