Materials and methods: Polymorphic analysis of MCC, DCC and YNZ22 loci that contain a variable number of tandem repeat(VNTR) was performed in 41 surgical specimens of colorectal carcinoma by the polymerase chain reaction(PCR).

• 方法：应用多聚酶链反应技术对41例大肠癌MCC、DCC基因和YNZ22位点的数量可变的重复序列（VNTR）区进行了分析。