Immune checkpoint inhibitors have revolutionized cancer treatment due to their undeniable efficacy, but a range of new adverse events (AE) has emerged. In particular, cardiac toxicity is a ...potentially fatal AE, and introduces new challenges regarding its underlying molecular mechanisms of occurrence, optimal treatment and follow up, and prevention. We present a clinical case of a patient with advanced kidney cancer treated with nivolumab as a third line treatment. After four cycles, the patient developed nonspecific symptoms and was hospitalized, identifying a set of clinical, analytical and electrocardiographic alterations compatible with myocarditis. Despite the intensive support, the patient died and a necropsy study was performed. We present a detailed description of the clinical case including the pathological and molecular findings, and we conduct a review of the available evidence related to immune-mediated cardiac toxicity to offer some new highlights in the management of this AE.
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