Stage 4 Non-small Cell Lung Cancer With Human Epidermal Growth Factor Receptor 2 Alterations and Myocarditis Induced by Immune Checkpoint Inhibitors: A Case Report.

Immune checkpoint inhibitor (ICI)-induced myocarditis is one of the most serious and potentially fatal toxicities of immunotherapy. Most of the guidelines for managing this toxicity are based on expert opinions. Human epidermal growth factor receptor 2 (HER2) alterations in non-small cell lung cancer (NSCLC) could be found using next-generation sequencing (NGS) on tissue and liquid biopsies.