Nivolumab and Radiation Therapy With or Without Ipilimumab in Treating Patients With Brain Metastases From Non-small Cell Lung Cancer

This phase I/II trial studies the side effects and best dose of nivolumab when giving together with stereotactic radiosurgery or whole brain radiotherapy with or without ipilimumab and to see how well they work in treating patients with non-small cell lung cancer that has spread to the brain. Monoclonal antibodies, such as nivolumab and ipilimumab, may interfere with the ability of tumor cells to grow and spread. Stereotactic radiosurgery is a specialized radiation therapy that delivers a single, high dose of radiation directly to the tumor and may cause less damage to normal tissue. Radiation therapy, such as whole-brain radiotherapy, uses high energy x-rays to kill tumor cells and shrink tumors. Giving nivolumab together with stereotactic radiosurgery or whole brain radiotherapy with or without ipilimumab may work better in treating patients with non-small cell lung cancer that has spread to the brain.