Acalabrutinib With or Without Obinutuzumab in Treating Patients With Early-Stage Chronic Lymphocytic Leukemia or Small Lymphocytic Lymphoma

This phase II trials studies how well acalabrutinib with or without obinutuzumab works in treating patients with early-stage chronic lymphocytic leukemia or small lymphocytic lymphoma. Acalabrutinib may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. Immunotherapy with monoclonal antibodies, such as obinutuzumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. It is not yet known whether giving acalabrutinib with or without obinutuzumab will work better in treating patients with early-stage chronic lymphocytic leukemia or small lymphocytic lymphoma.