Beyond 1st CR (complete remission) with relapsed or persistent disease and not eligible or appropriate for conventional allogeneic or autologous SCT Disease responding or stable after most recent therapy (chemotherapy, MoAb, etc...) Relapsed after prior autologous SCT B-cell prolymphocytic leukemia (PLL) with relapsed or residual disease after at least 1 prior therapy and not eligible for allogeneic SCT