Subsequent Line Gemcitabine and Nivolumab in Treating Participants With Metastatic Small Cell Lung Cancer

This phase II pilot trial studies how well gemcitabine and nivolumab work in treating participants with small cell lung cancer that has spread to other parts of the body after other treatments have failed. Drugs used in chemotherapy, such as gemcitabine, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Monoclonal antibodies, such as nivolumab, may interfere with the ability of tumor cells to grow and spread. Giving second-line gemcitabine and nivolumab may work better in treating participants with small cell lung cancer.