遗传性大肠癌家系是研究我国大肠癌病因、遗传特征和分子改变的重要资源。随着我国计划生育国策的落实 ,我国家庭规模日趋小型化 ,收集和保存这些家系资源显得越发重要。为了抢救、保存我国宝贵的遗传性大肠癌家系 ,中国抗癌协会大肠癌专业委员会于 2 0 0 3年 4月 13日在杭州组 Hereditary colorectal cancer pedigree is an important resource to study the cause, genetic characteristics and molecular changes of colorectal cancer in our country. With the implementation of the national policy of family planning in China, the size of families in our country has become more and more miniaturized. It has become more and more important to collect and preserve these family resources. In order to save and save our precious hereditary colorectal cancer pedigree, the China Anti-Cancer Association Colorectal Cancer Committee was established in Hangzhou on April 13, 2003