Low Dose Total-Body Irradiation And Fludarabine Followed By HLA Matched Allogeneic Stem Cell Transplantation For Hematologic Malgnancies - A Multi-Center Study

OBJECTIVES:

• Determine the response rate and duration of response in patients with low-risk hematologic malignancies treated with low-dose total-body irradiation (TBI) and fludarabine followed by HLA-matched allogeneic stem cell transplantation followed by a slow immunosuppression taper and donor leukocyte infusions (DLI).
• Determine the response rate and duration of response in patients with high-risk hematologic malignancies treated with low-dose TBI and fludarabine followed by HLA-matched allogeneic stem cell transplantation followed by a faster immunosuppression taper and DLI.
• Determine the incidence and extent of graft-versus-host disease, regimen-related toxicity, and engraftment in patients treated with these regimens.
• Assess the quality of life of patients treated with these regimens.

OUTLINE: This is a multicenter study. Patients are assigned to 1 of 2 groups (high-risk vs low-risk hematologic malignancy). The high-risk group includes acute myelogenous leukemia, myelodysplastic syndromes, accelerated phase chronic myelogenous leukemia (CML), second chronic phase CML, and non-Hodgkin's lymphoma. The low-risk group includes Hodgkin's lymphoma, first chronic phase CML, multiple myeloma, and chronic lymphocytic leukemia.

Patients receive fludarabine IV on days -4 to -2. Patients undergo total-body irradiation on day 0 followed by allogeneic stem cell transplantation. Patients also receive oral mycophenolate mofetil on days 0-28.

High-risk patients receive oral cyclosporine twice daily on days -2 to day 60. Patients with persistent disease, T-cell chimerism, and no graft-vs-host disease (GVHD) on day 90 receive up to 3 doses of donor leukocyte infusion (DLI) over the next 4 months.