IL23R and cancer: Furthermore, polymorphisms in the IL-23R have been linked to a number of cancers, including gastric (Chen et al., 2010), colorectal (Poole et al., 2012), oral (Chien et al., 2012), esophageal (Chu et al., 2012), leukemia (Qian et al., 2013a), hepatitis B virus (HBV)-related hepatocellular carcinoma (Xu et al., 2013), breast, lung, and nasopharyngeal cancer (Zheng et al., 2012).