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1材料和方法1．1材料本组材料取自本院1991～1997年大肠癌根治标本和纤维结肠镜活检标本的存档蜡块。包括18例大肠腺瘤、25例大肠腺癌及6例正常大肠粘膜。根据WHO组织学分类及全国大肠癌病理研究标准分为：乳头状腺癌4例，管状腺癌19例，粘液腺癌2例；按组织分化程度分为高分化
1Materials and methods 1.1 Materials The materials of this group were taken from archived paraffin blocks of colon cancer radical specimens and colonoscopy biopsy specimens from 1991 to 1997 in this hospital. Including 18 cases of colorectal adenoma, 25 cases of colorectal adenocarcinoma and 6 cases of normal colorectal mucosa. According to the histological classification of WHO and the national pathological criteria for colorectal cancer, there were 4 cases of papillary adenocarcinoma, 19 cases of tubular adenocarcinoma, and 2 cases of mucinous adenocarcinoma. They were divided into well-differentiated tissues according to their degree of differentiation.