OUTLINE: Patients undergo bone marrow harvest. The bone marrow is treated with c-myb antisense oligodeoxynucleotide and cryopreserved. A portion of the marrow is cryopreserved untreated in case of engraftment failure. Patients receive oral busulfan every 6 hours on days -7 to -4 for a total of 16 doses. Patients receive cyclophosphamide IV over 1 hour on days -3 and -2. Bone marrow is reinfused on day 0. Patients receive filgrastim (G-CSF) subcutaneously daily beginning on day 0 and continuing until blood counts recover. Patients are followed every 2-3 months for 2 years.