- Cohort I: Patients receive filgrastim (G-CSF) subcutaneously (SC) beginning 4 days prior to peripheral blood stem cell (PBSC) mobilization and continuing until adequate PBSC are collected. Patients receive unlabeled monoclonal antibody (MOAB) Lym-1 IV followed by a tracer dose of indium In 111 MOAB Lym-1 (In111 MOAB Lym-1) IV on day 0 and unlabeled MOAB Lym-1 IV followed by Y90 MOAB Lym-1 IV on day 7. Patients also receive oral cyclosporine every 12 hours on days -2 to 14. Patients may undergo autologous PBSC transplantation, if necessary, no earlier than day 17 and receive G-CSF SC beginning at the completion of PBSC re-infusion and continuing until blood counts recover.