Dr. Dwight Owen is back on the ASCO Guidelines podcast, discussing the latest updates to the ASCO living guidelines for stage IV NSCLC. In Part 1, Dr. Owen presents the update for stage IV NSCLC without driver alterations. He reviews new evidence from EMPOWER-Lung3 and POSEIDON and discusses new recommended options for patients with squamous cell carcinoma and non-squamous cell carcinoma, and PD-L1 tumor proportion score 0-49%. Read the update, “Therapy for Stage IV Non-Small Cell Lung Cancer Without Driver Alterations: ASCO Living Guideline, Version 2023.1” and view all recommendations at www.asco.org/living-guidelines. Listen to Part 2 for recommendations for patients with stage IV NSCLC with driver alterations. TRANSCRIPT This guideline, clinical tools, and resources are available at www.asco.org/living-guidelines. Read the full text of the guideline and review authors’ disclosures of potential conflicts of interest disclosures in the Journal of Clinical Oncology, https://ascopubs.org/doi/10.1200/JCO.23.00282  Brittany Harvey: Hello and welcome to the ASCO Guidelines Podcast, one of ASCO’s podcasts delivering timely information to keep you up to date on the latest changes, challenges, and advances in oncology. You can find all the shows, including this one, at asco.org/podcasts.   My name is Brittany Harvey, and I'd like to welcome back Dr. Dwight Owen from Ohio State University in Columbus, Ohio, co-chair on ‘Therapy for Stage IV Non-Small-Cell Lung Cancer Without Driver Alterations: ASCO Living Guideline Version 2023.1’.   Thank you for being here, Dr. Owen. Dr. Dwight Owen: Thanks for having me, Brittany. Brittany Harvey: Then, before we discuss this update, I'd like to note that ASCO takes great care in the development of its guidelines and ensuring that the ASCO conflict of interest policy is followed for each guideline. The disclosures of potential conflicts of interest for the guideline panel, including Dr. Owen on this episode, are available online, with a publication of the guideline in the Journal of Clinical Oncology linked in the show notes.   So then, diving into this update, this living clinical practice guideline for systemic therapy for patients with stage IV non-small cell lung cancer without driver alterations is being updated on a regular basis. What was the new evidence identified by the expert panel through routine literature searches to prompt an update to the recommendations? Dr. Dwight Owen: Yeah. Thanks, Brittany. I think it's really important to point out that these living guidelines are evidence-based. And so, we are constantly reviewing the literature to find new data to support recommendations for treatment options for clinicians to choose for their patients with metastatic non-small cell lung cancer. Clinicians these days, and physicians and oncologists are faced with so much information coming from abstracts to press releases to publications of new clinical trial results that it can be sometimes overwhelming to keep track of all the latest breakthroughs and nuances in the literature for non-small cell lung cancer.  So for this specific update, the panel and the committee reviewed two papers, including the EMPOWER Lung-3 Study and the POSEIDON Study. The EMPOWER Lung-3 study was a double-blind, placebo-controlled phase III study investigating cemiplimab plus platinum doublet chemotherapy as the first treatment for patients with either locally advanced stage III or stage IV non-small cell lung cancer without either an EGFR, ALK, or ROS1 alteration. And this is a mode of treatment that we've seen before, which is a PD-1 plus chemotherapy or PD-L1 plus chemotherapy compared to a chemotherapy control. And indeed, we did see an improvement in median overall survival in this study with the addition of cemiplimab to chemotherapy of almost 22 months versus 13 months with the placebo. This was accompanied by a higher rate of grade 3 or higher toxicities. But overa