Testing the Combination of Venetoclax and Rituximab, in Comparison to the Usual Treatment (Ibrutinib and Rituximab) for Waldenstrom's Macroglobulinemia/Lymphoplasmacytic Lymphoma

This phase II trial studies the effects of venetoclax and rituximab in comparison to ibrutinib and rituximab in treating patients with previously untreated Waldenstrom\'s macroglobulinemia/lymphoplasmacytic lymphoma. Ibrutinib may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. Rituximab is a monoclonal antibody. It binds to a protein called CD20, which is found on B cells (a type of white blood cell) and some types of cancer cells. This may help the immune system kill cancer cells. 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. Giving venetoclax and rituximab may work better in treating patients with previously untreated Waldenstrom\'s macroglobulinemia than ibrutinib and rituximab alone.