Chemotherapy With or Without Immune Checkpoint Inhibitors for Lung Cancer

This study collects and analyzes data from lung cancer patients who receive chemotherapy with or without immunotherapy (immune checkpoint inhibitors). The goal is to better understand which patients respond best and why, using real-world treatment data. **You may be eligible if...** - You are 18 or older with a confirmed lung cancer diagnosis - You are receiving or have received chemotherapy with or without immunotherapy - You have measurable tumors on imaging and are in reasonably good health **You may NOT be eligible if...** - You do not meet the above criteria - You are in very poor physical health (ECOG 2 or higher) Talk to your doctor to see if this trial is right for you.