BEAM vs. 90-Yttrium Ibritumomab Tiuxetan (Zevalin®)/BEAM With ASCT for Relapsed DLBCL

PRIMARY OBJECTIVES: I. To compare overall survival (OS) between the two transplant arms, with at least a two year of follow-up. SECONDARY OBJECTIVES: I. To compare progression-free survival (PFS), complete response (CR) and partial response (PR) proportion at day 100, time to hematopoietic recovery, incidence of infection, grade III-IV toxicities, treatment-related mortality, incidence of myelodysplastic syndrome (MDS), and secondary acute myelogenous leukemia (AML). OUTLINE: Patients are randomized to 1 of 2 treatment arms. ARM I: Patients receive rituximab intravenously (IV) on days -21 and -14, and 90-yttrium ibritumomab tiuxetan IV on day -14. Patients also receive BEAM comprising carmustine IV over 4 hours on day -6; cytarabine IV over 2 hours twice daily (BID) on days -5 to -2; etoposide IV over 1 hour BID or once daily (QD) on days -5 to -2; and melphalan IV on day -1. Patients then undergo peripheral blood stem cell (PBSC) transplant on day 0. ARM II: Patients receive BEAM as in Arm I and undergo PBSC transplant on day 0. After completion of study treatment, patients are followed up weekly for 30 days, 100 days, 6 months, 1 year, every 3 months for 1 year, and then annually for 3 years.