Keywords: CTLA-4, cytotoxic T lymphocyte-associated antigen-4; EMB, endomyocardial biopsy; EV, enterovirus; ICI, immune checkpoint inhibitors; LVEF, left ventricular ejection fraction; PD-1, programmed cell death-1; PD-L1, programmed cell death-ligand 1; enterovirus; giant cell myocarditis; imaging; immune checkpoint inhibitors; immunotherapy; myocarditis.