MUC1 and hepatocellular carcinoma: Mucin-1 (MUC-1), epithelial cell adhesion molecule (EpCAM) and cluster of differentiation 147 (CD147) are expressed on the surface of HCC cells [114,115,116] and CAR-T cells for these two molecules are being evaluated in multiple clinical trials, such as NCT02587689, NCT03013712, NCT02729493 and NCT03993743, the results of which are yet to be determined.