Study of Lenalidomide and Ofatumumab for the Treatment of Relapsed or Refractory Non-Hodgkin's Lymphoma

This trial will investigate the efficacy of ofatumumab and lenalidomide in patients with lymphoma and investigate if any possible unwanted side effects may occur. Ofatumumab is a human antibody (a type of protein) that binds specifically to a protein (CD20) on the surface of some of the white blood cells (B-cells). Research, so far, has shown that ofatumumab can destroy cancer cells which originate from B cells. Ofatumumab is approved for sale by the US Food and Drug Administration (FDA). The medicine has an approved indication for Chronic Lymphocytic Leukemia (CLL) but is not approved for Non-Hodgkin's Lymphoma (NHL). Lenalidomide is a drug that affects the immune system. Lenalidomide can change the body's immune system and it may also interfere with the development of tiny blood vessels that help support tumor growth. Therefore, it may reduce or prevent the growth of cancer cells. Lenalidomide is approved by the FDA for treatment of multiple myeloma (MM) and myelodysplastic syndrome (MDS) and has been shown to be effective in lymphoma that does not respond to treatment or has come back after treatment. Lenalidomide has not been approved by the United States (US) Food and Drug Administration (FDA) and is experimental (investigational) in this study.