Keywords: 2018-LL, 2018-Lake Louise; ACS, acute coronary syndrome; CMR, cardiac magnetic resonance; ECG, electrocardiogram; EMB, endomyocardial biopsy; IC-OS, International Cardio-Oncology Society; ICI, immune checkpoint inhibitor; ICI-M, immune checkpoint inhibitor–induced myocarditis; LGE, late gadolinium enhancement; MACE, major cardiovascular events; cTn, cardiac troponin; diagnosis; immunotherapy; irAE, immune-related adverse event; myocarditis; screening.