Abstract
Emerging data supporting the rise of perioperative immune checkpoint inhibitors (ICIs) as a standard of care in the treatment of early stage, surgically resectable non-small cell lung cancer (NSCLC) dominated the NSCLC news in 2023. Adjuvant pembrolizumab became the second adjuvant ICI to receive US Food and Drug Administration approval in early 2023 after the 2021 approval of adjuvant atezolizumab and the 2022 approval of neoadjuvant nivolumab with chemotherapy. Subsequently in 2023, multiple phase 3 trials examining perioperative ICIs were positive and demonstrated clinically meaningful outcomes by prolonging event-free survival, improving pathologic complete response rates, and trending toward improved overall survival in most. Perioperative pembrolizumab became the first ICI to attain US Food and Drug Administration approval in this setting through the KEYNOTE-671 trial (ClinicalTrials.gov identifier NCT03425643), which also demonstrated a definitive overall survival benefit in the entire study population. However, questions remain regarding patient selection for either approach and how we can optimize biomarkers to determine who needs adjuvant therapy after surgery.
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