Palliative Radiotherapy With Lurbinectedin in Patients With Extensive Stage Small Cell Lung Cancer

This phase I trial aims to determine if it is safe to use palliative radiotherapy and lurbinectedin at the same time to treat small cell lung cancer that has spread outside of the chest and that has grown after being treated with chemotherapy (extensive stage). Lurbinectedin kills tumor cells by blocks a process called transcription that small cell lung cancer relies on to survive. It also damages the deoxyribonucleic acid (DNA) of tumor cells, which is similar to the way radiation kills tumor cells. Palliative radiotherapy is a routine medical treatment for patients who have lung cancer that has spread to other parts of the body (metastatic), and is used to relieve symptoms caused by cancer or to patients from developing symptoms. This trial may help doctors understand if treating patients with lurbinectedin and palliative radiotherapy at the same time would make them both work better than either one alone or if they could cause more side effects for patients when given together.