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结直肠癌是消化系统中常见的恶性肿瘤之一,在西方国家恶性肿瘤致死病因中占第二位,在我国其发病率也逐年上升,并呈年轻化趋势,就目前的医疗水平而言,最有效的治疗手段仍是行彻底的手术切除。自1991年Jacobs等
Colorectal cancer is one of the most common malignant tumors in the digestive system. It ranks second in the cause of death from malignant tumors in western countries. Its incidence in China also increases year by year and tends to be younger. As far as the present medical treatment is concerned, The most effective treatment is still a thorough surgical removal. Since 1991, Jacobs et al