Glofitamab With Obinutuzumab Pre-treatment for the Treatment of Central Nervous System Lymphoma

This phase Ib trial tests the safety and side effects of glofitamab after pre-treatment with obinutuzumab and how well they work in treating patients with central nervous system (CNS) lymphoma. Glofitamab is a bispecific antibody that can bind to two different antigens (substances that cause the body to make a specific immune response) at the same time. Glofitamab binds to CD20 on lymphoma cells, and CD3 on T-cells (a type of white blood cell) and may interfere with the ability of cancer cells to grow and spread. Obinutuzumab is a monoclonal antibody that may interfere with the ability of cancer cells to grow and spread. 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). Obinutuzumab can also be administered as a pre-treatment to make glofitamab safer and more tolerable. Giving glofitamab with obinutuzumab pre-treatment may be safe, tolerable, and/or effective in treating patients with CNS lymphoma.