Objective To explore relationship between genetic polymorphisms of O~6-Methylguanine-DNA methyltransferase (MGMT) gene and esophageal cancer in Kazakh in Xinjiang. Methods Codon 84C>T(L84F)、Codon 53C>T(L53L)、Codon 143A>G(I143V)、Promoter 135G>T、Promoter 485C>A of MGMT gene in 160 individuals including 51 esophageal squamous cell cancer (ESCC) patients and 109 healthy controls of Kazakh in Xinjiang was genotyped by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) based on case-con...