Individuals with GSTP1 Val/Val genotype had significantly better survival in hepatocellular carcinoma patients (Cheng-Gang et al., 2012), but this genotype is associated with worse outcome in basal cell carcinoma (Ramachamdran et al., 2000) and breast cancer (Zhang et al., 2011). Here, GSTP1 is linked to hepatocellular carcinoma.