OBJECTIVES: I. Determine the incidence and severity of graft vs host disease (GVHD) following allogeneic bone marrow transplantation with marrow grafts modified by T cell depletion with counterflow centrifugal elutriation and CD34+ cell selection in patients at high risk for GVHD. II. Determine the incidence of graft failure following this treatment regimen in this patient population. III. Determine the relapse rate and overall survival in this patient population treated with this regimen.