“…Numerous epidemiologic studies have reported that XRCC4 gene polymorphisms are associated with the risk of several types of cancers, such as colorectal cancer, acute lymphoblastic leukemia, breast cancer, glioma, hepatocellular carcinoma, non-small-cell lung cancer, esophageal cancer and prostate cancer (Bau et al, 2010;Chokkalingam et al, 2011;Zhou et al, 2012;He et al, 2013;Long et al, 2013;Zhao et al, 2013;Fan et al, 2013;Shao et al, 2014). Bau et al (2010) investigated the association between XRCC4 gene polymorphisms and the susceptibility to colorectal cancer, and suggested that XRCC4 rs6869366 polymorphism may contribute to the development of esophageal cancer and may be useful for early detection of colorectal cancer.…”