EZH2 and neoplasm: In contrast to the observed differential expression of AR in the tumor and normal liver tissue, no difference in EZH2 expression (ThermoFisher, Waltham, MA, USA, catalog # TA803011) was noticed—both the HCA and the normal liver tissue displayed rare, faintly stained cells (Figure 4C,D)—the staining displayed likely represents a background signal.