This clinical trial is focused on studying a type of lung cancer known as advanced non-small cell lung cancer (NSCLC). The study involves patients who have previously received treatment targeting a protein called PD-1 but have not responded as hoped. The trial will explore the effects of two medications: cemiplimab (also known by its code name REGN2810) and ipilimumab (also known by its code name BMS734016). These medications are given as solutions through an intravenous (IV) infusion, which means they are delivered directly into the bloodstream through a vein.
The purpose of the study is to see if reintroducing cemiplimab after initial treatment with ipilimumab and additional radiotherapy can help control the cancer. Radiotherapy is a treatment that uses high doses of radiation to kill cancer cells and shrink tumors. The study will monitor how well the cancer responds to this combination of treatments over time. Some participants will receive a placebo, which is a substance with no active medication, to compare the effects of the actual treatment.
Participants in the study will receive the treatments over a period of time and will be regularly monitored to assess their response. The study aims to determine if the cancer shows a complete or partial response, meaning it shrinks or disappears, or if it remains stable without growing for at least six months. The safety of the treatments and any side effects will also be closely observed. The trial is expected to continue until 2025, providing valuable information on the potential benefits of this treatment approach for patients with advanced NSCLC.



The Netherlands