National Cancer Institute (NCI)
This phase III trial compares early treatment with venetoclax and obinutuzumab versus delayed treatment with venetoclax and obinutuzumab in patients with newly diagnosed high-risk chronic lymphocytic leukemia or small lymphocytic lymphoma. Venetoclax is in a class of medications called B-cell lymphoma-2 (BCL-2) inhibitors. It may stop the growth of cancer cells by blocking Bcl-2, a protein needed for cancer cell survival. 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. Starting treatment with the venetoclax and obinutuzumab early (before patients have symptoms) may have better outcomes for patients with chronic lymphocytic leukemia or small lymphocytic lymphoma compared to starting treatment with the venetoclax and obinutuzumab after patients show symptoms.
PRIMARY OBJECTIVE: I. To evaluate whether early treatment with venetoclax and obinutuzumab (V-O) extends overall survival (OS) compared with delayed treatment with V-O in high-risk (Chronic Lymphocytic Leukemia \[CLL\] International Prognostic Indicator \[CLL-IPI\] \>= 4 or complex cytogenetics), newly diagnosed asymptomatic CLL/small lymphocytic lymphoma (SLL) participants. SECONDARY OBJECTIVES: I. To compare overall response rates (complete response \[CR\] + complete response with incomplete marrow recovery \[CRi\] + partial response \[PR\]), CR rates, progression-free survival (PFS), and…
Inclusion Criteria: * Participants must have a confirmed diagnosis of chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL) (collectively referred to as CLL throughout) according to the 2018 International Workshop on CLL. Participants must have been diagnosed within 18 months prior to registration * Participants must have CLL-International Prognostic Index (CLL-IPI) score \>= 4 and/or complex cytogenetics (defined as 3+ chromosomal abnormalities) * Cytogenetic AND/OR FISH analyses must be completed at a Clinical Laboratory Improvement Act (CLIA)-approved (or laboratories accr…
Undergo collection of blood samples
Undergo bone marrow aspiration
Undergo bone marrow biopsy
Undergo CT
Given IV
Ancillary studies
Given PO