Retifanlimab with Bevacizumab and Hypofractionated Radiotherapy for the Treatment of Recurrent Glioblastoma

This phase II trial tests how well retifanlimab with bevacizumab and hypofractionated radiotherapy, compared to bevacizumab and hypofractionated radiotherapy alone, works in treating patients with glioblastoma that has come back after a period of improvement (recurrent). A monoclonal antibody is a type of protein that can bind to certain targets in the body, such as molecules that cause the body to make an immune response (antigens). Immunotherapy with monoclonal antibodies, such as retifanlimab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Bevacizumab is in a class of medications called antiangiogenic agents. It works by stopping the formation of blood vessels that bring oxygen and nutrients to tumor. This may slow the growth and spread of tumor. Hypofractionated radiation therapy delivers higher doses of radiation therapy over a shorter period of time and may kill more tumor cells and have fewer side effects. Giving retifanlimab with bevacizumab and hypofractionated radiotherapy may work better in treating patients with recurrent glioblastoma than bevacizumab and hypofractionated radiotherapy alone.