 - Chemotherapy and filgrastim G-CSF priming for PBSC collection: Patients receive cyclophosphamide IV on day 0; etoposide IV over 3 hours on days 0 and 1; and oral dexamethasone twice daily on days 0 and 1. Patients also receive G-CSF subcutaneously SC beginning on day 3 and continuing until apheresis is complete. After blood counts recover, apheresis is performed in 4-6 daily planned collections until the minimum CD34 cell dose of 2.5 x 106 cellskg is achieved. If the minimum CD34 cell dose is not achieved after 6 apheresis collections, patients undergo bone marrow examination including a bone marrow biopsy and aspiration, at the termination of the PBSC collection to confirm remission. If remission is confirmed, and if peripheral counts and marrow cellularity are sufficient, the patient remains off G-CSF for 7 days and receives sargramostim GM-CSF for 5 days to increase the marrow cellularity, after which a bone marrow harvest is performed. 