OUTLINE: This is a dose escalation of yttrium Y 90 monoclonal antibody MN-14 (90Y-hMN-14), multicenter study. Patients are stratified by prior radiotherapy (yes vs no). Patients receive filgrastim (G-CSF) subcutaneously on days -18 to -14 and peripheral blood stem cell (PBSC) collection on days -15 to -13. If an adequate number of CD34+ cells are not harvested, bone marrow is also collected. Patients receive pretherapy imaging with indium In 111 monoclonal antibody MN-14 (IN111-MN-14) IV on days -7 to 0. Patients receive 90Y-hMN-14 for up to 40 minutes on day 0. PBSC are reinfused on days 7 to 14. Patients receive G-CSF SQ until blood counts recover. Cohorts of 3-6 patients receive escalating doses of 90Y-hMN-14 until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose at which 2 of 3 or 2 of 6 patients experience dose limiting toxicity. Patients are followed at 1-4, 6, 8, 12, and 24 weeks, and then every 6 months thereafter for up to 5 years.