Patients undergoing dual treatment with Immune checkpoint inhibitors (ICI) for various cancers, e.g. melanoma, are at increased risk of developing myocarditis and cardiomyopathy. Currently, only limited data on serial myocardial tissue changes during treatment and whether they predict outcomes are available. Cardiac MRI (CMR) is the reference standard for non-invasive myocardial volumes/function analysis and uniquely characterizes myocardial tissue. Therefore, it may help detect myocardial tissue changes during treatment and help early treatment and prevent adverse cardiac outcomes.