RIOX2 and hepatocellular carcinoma: High levels of MDIG expression have been found in lung cancer (Lu et al., 2009[65]), renal cell carcinoma (Ishizaki et al., 2007[36]), lymphoma (Teye et al., 2007[86]), neuroblastoma (Fukahori et al., 2007[18]), esophageal squamous cell carcinoma, and HCC (Tsuneoka et al., 2004[90]).