IT-hu14.18-IL2 With Radiation, Nivolumab and Ipilimumab for Melanoma

This phase I/II trial is designed to determine the maximum tolerated dose or the maximum administered dose of intratumoral administration of hu14.18-IL2 and to evaluate side effects of intratumoral hu14.18-IL2 when given alone, after radiation therapy, after radiation therapy and in combination with nivolumab, and after radiation therapy and in combination with nivolumab and ipilimumab in patients with melanoma that is advanced (stage IV) or with melanoma that cannot be removed by surgery and is considered surgically incurable. Hu14.18-IL2 is a molecule called a fusion protein that can bind to some tumor cells and cause immune cells to become activated to kill tumor cells. Radiation therapy is a type of cancer treatment that uses beams of high energy x-rays to kill tumor cells and shrink tumors. Immunotherapy with immune checkpoint inhibitors, such as nivolumab and ipilimumab, can help the body's immune system attack cancer by releasing the "brakes" on the immune system to allow cancer fighting immune cells to remain activated. This study will evaluate whether giving intratumoral hu14.18-IL2 with radiation therapy, nivolumab and ipilimumab has antitumor activity for participants with advanced melanoma. After completion of study treatment, participants are followed up at 30 days, every 12 weeks for up to 2 years, and then every 6 months thereafter.