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结直肠癌是最常见的消化道恶性肿瘤之一,全球每年新发结直肠癌病例大约是875×103例或更多[1-2]。随饮食习惯和生活条件的改变,我国结直肠癌的发生也呈现高速上升的趋势,上海市区1972～1999年结肠癌的患病率上升100%以上[3]。近年来全国结直肠癌有逐步取代胃癌成为消化道最常
Colorectal cancer is one of the most common gastrointestinal malignancies. The annual number of newly diagnosed colorectal cancers in the world is about 875 × 103 cases or more [1-2]. With the change of dietary habits and living conditions, the incidence of colorectal cancer in China also showed a rapid upward trend. The prevalence of colon cancer in Shanghai increased by 100% from 1972 to 1999 [3]. In recent years, the country has gradually replaced colorectal cancer as the most common gastrointestinal tract