Objective To explore the association between genetic polymorphisms of glutathione S-transferase (GST) M1 and T1 and susceptibility to Kazak population esophageal cancer (EC). Methods A polymerase chain reaction method was used to detect absence of the GSTM1 and GSTT1 genes in genomic DNA in a high-risk ethnic, Xinjiang, China. Results The frequency of the GSTM1-null genotype in cancer cases (41.47%) was not significantly different from that in controls ( 34.15%). Similarly, no statistically significant ...