Rituximab, Lenalidomide, and Ibrutinib in Treating Patients With Previously Untreated Stage II-IV Follicular Lymphoma

This phase I trial studies the side effects and best dose of lenalidomide and ibrutinib when given together with rituximab in treating patients with previously untreated stage II-IV follicular lymphoma. Lenalidomide may stimulate the immune system in different ways and stop cancer cells from growing. 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. Giving lenalidomide and ibrutinib together with rituximab may work well in treating follicular lymphoma.