大肠癌是我国常见十大恶性肿瘤之一,据国内一些省、市的统计,其发病率和死亡率在恶性肿瘤中占第5—8位,而且近年来其发病率还有升高的趋势,随着大肠癌的重要性渐被认识,国内大肠癌的病理研究亦得到了迅速发展,主要体现在以下几方面。一、全国大肠癌协作组的建立和《全国大肠癌病理研究统一规范》(以下 Colorectal cancer is one of the ten most common malignancies in China. According to the statistics of some provinces and cities in China, its incidence and mortality account for the 5th to 8th among malignant tumors, and its incidence has increased in recent years. With the recognition of the importance of colorectal cancer, the pathological study of domestic colorectal cancer has also been rapidly developed, mainly in the following aspects. First, the establishment of the National Colorectal Cancer Cooperative Group and the “National Uniform Specification for Colorectal Cancer Pathology Study” (below