“While immunotherapy with programmed death receptor 1 (PD-1) inhibiting antibodies has revolutionized the treatment of non-small cell lung cancer (NSCLC), use of these agents comes at the cost of potential serious immune-related adverse events (irAEs). In melanoma, development of cutaneous irAEs, such as rash and vitiligo, during treatment with PD-1 inhibitors has been shown to be associated with survival benefit, suggesting that early onset of irAEs may predict treatment outcomes. However, in NSCLC, the predictive value of immunotherapy-related toxicity as a clinical marker for efficacy to PD-1 inhibition is unknown. A multi-institution retrospective study investigated the relation between the development of irAEs and efficacy of PD-1 inhibitors in 134 patients with advanced or recurrent NSCLC who received second-line treatment with nivolumab. The primary outcome for this analysis was progression-free survival (PFS) according to the development of irAEs in a 6-week landmark analysis.”
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