Impact of Neoadjuvant Immune Checkpoint Inhibitors on Surgery and Perioperative Complications in Patients With Non-small-cell Lung Cancer: A Systematic Review

Several clinical trials are currently underway to evaluate immune checkpoint inhibitors (ICIs) as neoadjuvant treatment for patients with early-stage non-small-cell lung cancer (NSCLC), and their use in clinical practice is expected to increase in the future. Therefore, a proper assessment of surgical outcomes and perioperative complications after neoadjuvant ICIs is essential to establish recommendations and guidelines. We performed a systematic literature review in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines (PRISMA), searching the PubMed and Scopus databases from the January 1, 2017, to the July 27, 2023, to identify potentially relevant published trials of neoadjuvant ICIs in patients with reseactable NSCLC with available information on surgical outcomes and perioperative complications. A total of 18 studies were included in the review. The rates of surgery cancellation ranged from 0% to 45.8%. Importantly, adverse events (AEs) were the least reported underlying cause, while disease progression caused from 0% to 75% of cancellations. Surgery delays ranged from 0% to 31.3% with AEs as the most frequently reported underlying cause. However, 6 out of 13 trials (46.2%) reported no surgery delays. Conversion rates from minimally invasive to open chest surgery were available for 7 trials and ranged from 0% to 53.8%. Thir ty-day mor tality rates ranged from 0% to 5.4%, with 11 out of 16 trials reporting 0%. A few reports descr ibed per ioperative complications in detail. Considering the limited evidence available, we can preliminarily confirm that preoperative ICIs are safe and well tolerated even from the surgical perspective. Additional details on intraoperative findings from prospective controlled trials are needed to establish and disseminate guidelines and recommendations for thoracic surgeons.