XIST and hepatocellular carcinoma: Studies have found that lncRNA XIST is abnormally expressed in multiple tumor tissues including non-small-cell lung cancer, glioblastoma, gastric cancer, hepatocellular carcinoma, ovarian cancer, and breast cancer (Li Chang et al. 2018b; Ma et al. 2017; Song et al. 2016; Xiong et al. 2017).