OUTLINE: Autologous bone marrow is harvested before study entry. Patients receive high-dose cyclophosphamide IV over 1 hour and mitoxantrone IV over 15 minutes on days -8, -6, and -4 and carboplatin IV continuously on days -8 to -3 in the absence of unacceptable toxicity. Bone marrow is reinfused on day 0 beginning at least 60 hours after completion of carboplatin infusion.