Can focused radiation boost Immunotherapy's power against advanced cancer?

This phase II trial is testing whether adding a type of precise radiation called stereotactic body radiation therapy (SBRT) to standard immunotherapy can help people with stage IV cancers, including head and neck, lung, cervical, esophageal, and gastric cancers. Participants will receive SBRT to several metastatic spots during their first cycle of an immune checkpoint inhibitor like pembrolizumab or nivolumab. The main question is whether this combination can delay cancer progression for at least six months, while researchers also monitor side effects and overall survival.