[1]Department of Oncology the First Affiliated Hospital of the Medical College Shihezi University Shihezi 832008 China;
[2]Department of Clinical Medicine School of Medicine Shihezi University Shihezi 832008 China;
[3]Department of Oncology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China;
esophageal squamous cell carcinoma; prognosis; single nucleotide polymorphism; survival; epidermal growth factor receptor;