Fractionated Stem Cell Infusions in Myeloma Patients Undergoing Autologous Stem Cell Transplant

Following enrollment patients will be treated with melphalan intravenously (IV) through a central venous catheter (CVC) over 30 minutes at 200mg/m2 or 140mg/m2 (if creatinine clearance is \< or = to 50 and/or age \> 70 years) on day -2. Following 24 hours of rest, the first dose of CD34+ stem cell will be administered on day 0 (2.5-5 x 106 CD 34+ stem cells/kg)+/- 0.5 x 106 CD34+ stem cells/kg), followed by 3 additional doses of CD 34+ stem cells (1.5-2.5 x 106 CD 34+ stem cells/kg)+/- 0.5 x 106 CD34+ stem cells/kg) on days +2, +4, and +6. Pegfilgrastim 6μg will be administered on day +1. Filgrastim 5μg/kg will be 12-24 hours after the 2nd-4th stem cell infusions. There will be a +/- 1 day window for the Day +2, +4, and +6 infusions to accommodate infusions that occur over the weekend or on holidays.