This clinical trial is focused on studying a type of lung cancer known as metastatic non-small cell lung cancer (NSCLC) in patients whose tumors have a high level of a protein called PD-L1. The study is comparing two forms of a treatment called pembrolizumab. One form is given as a shot under the skin, known as subcutaneous pembrolizumab combined with a substance called hyaluronidase (referred to as MK-3475A), and the other form is given directly into a vein, known as intravenous pembrolizumab.
The purpose of the study is to compare how the body absorbs and processes these two forms of pembrolizumab in patients who are receiving it as their first treatment for this type of lung cancer. Participants will receive either the subcutaneous or intravenous form of pembrolizumab, and the study will monitor how the drug behaves in the body over time. This includes looking at how much of the drug is present in the blood at different times and how long it stays in the body.
Throughout the study, researchers will also observe the overall health and quality of life of the participants, as well as any side effects they may experience. The study aims to provide valuable information on the safety and effectiveness of these two methods of administering pembrolizumab, which could help improve treatment options for patients with this type of lung cancer.



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