结直肠癌是消化道常见的恶性肿瘤之一,其发病率和病死率呈上升趋势。有文献报道,2002年结直肠癌新病例102.3万,死亡52.9万,其发病率和病死率分别居所有癌症的第3位和第4位。在现有2 460万癌症患者中,结直肠癌占11.4%[1-2]。近年来,我国青年人(30岁)大肠癌呈上升趋势,但性别无 Colorectal cancer is one of the common malignant tumors of the digestive tract, and its morbidity and mortality are on the rise. It has been reported in the literature that in 2002, there were 1,023,000 new cases of colorectal cancer with a death rate of 529,000. The morbidity and mortality of these cases are the third and fourth of all cancers respectively. Among the existing 46.6 million cancer patients, colorectal cancer accounts for 11.4% [1-2]. In recent years, our country’s young people (30 years old) colorectal cancer is on the rise, but the gender is absent