SALL4 and hepatocellular carcinoma: Previous immunohistochemical studies on SALL4 expression in HCC demonstrated positivity rates ranging from 0 to 85% (Miettinen et al. 2014; Yong et al. 2013; Ushiku et al. 2010; Gonzalez-Roibon et al. 2013; Oikawa et al. 2013; Zeng et al. 2014; Liu et al. 2014; Han et al. 2014).