Methods: Polymorphic analysis of the genetic loci of YNZ22 and DCC containing a variable number of tandem repeat was performed in 46 surgically resected specimens of esophageal carcinoma with PCR.

• 方法：应用聚合酶链反应技术对46例食管癌YNZ22位点和DCC基因数目可变的串联重复序列（VNTR）区进行了分析。