“…VEGF gene polymorphisms may influence the gene expression and affect plasma VEGF levels (Renner et al, 2000;Watson et al, 2000). Previous studies reported that VEGF gene polymorphisms may influence the development of many solid tumors, such as esophageal cancer, colorectal cancer, renal cell carcinoma, and breast cancer (Yao et al, 2014;Jannuzzi et al, 2015;Ma et al, 2015;Qasim et al, 2015). Qasim et al (2015) conducted a case-control study to investigate the role of the VEGF +936C/T and +404C/G polymorphisms on the risk of esophageal cancer, and they found a significant association between the VEGF +936C/T and +404C/G polymorphisms and esophageal cancer risk.…”