MUC1 and intrahepatic cholangiocarcinoma: Recent studies have indicated that MUC1-Tn is a potential therapeutic target for intrahepatic cholangiocarcinoma (ICC) and that CAR-T cells targeting MUC1-Tn can specifically eliminate MUC1-Tn-positive ICC cells but not MUC1-Tn-negative ICC cells in vitro and in vivo, which may be a novel therapeutic strategy for ICC [200,202].