OUTLINE: Peripheral blood stem cells (PBSC) are collected. Patients sequentially receive cyclophosphamide IV over 1 hour, thiotepa IV over 1 hour, and carboplatin IV over 1 hour on days -6 to -4. PBSC are reinfused on day 0. Patients are followed at 3 months, 6 months, 1 year, and then annually thereafter.