This clinical trial is focused on studying a type of lung cancer known as Small Cell Lung Cancer (SCLC). The study is investigating a combination of two treatments: lurbinectedin and pembrolizumab. Lurbinectedin, also known by its code name PM01183, is a medication that is used to treat cancer by interfering with the growth of cancer cells. Pembrolizumab, marketed as KEYTRUDA, is an immunotherapy drug that helps the immune system recognize and attack cancer cells.
The purpose of this study is to explore the safety and effectiveness of these two drugs when used together in patients whose SCLC has returned after initial treatment. The study is divided into two stages. In the first stage, researchers aim to find the best dose of lurbinectedin to use with pembrolizumab. In the second stage, they will assess how well this combination works in treating the cancer. Participants will receive the medications through an intravenous infusion, which means the drugs are given directly into a vein.
Throughout the study, participants will be monitored for any side effects and the response of their cancer to the treatment. This will involve regular check-ups and imaging tests like CT scans or MRI to track the size and spread of the cancer. The study will help determine if this combination of treatments can provide a new option for patients with relapsed SCLC.



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