Study: NCT00096460

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Cyclophosphamide and Rituximab
Description: Prior to undergoing HSCT, all patients will receive Cyclophosphamide 4 gm/m2 with Rituximab 375 mg/m2 x 2 doses and G-CSF support.

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Cyclophosphamide and Rituximab
Description: Prior to undergoing HSCT, all patients will receive Cyclophosphamide 4 gm/m2 with Rituximab 375 mg/m2 x 2 doses and G-CSF support.

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Filgrastim
Description: Autologous HSCT patients will receive 10 mcg/kg/day and allogeneic HSCT patients will receive 5 mcg/kg/day subcutaneous (SQ) or intravenous (IV) starting 2 days after the initiation of Cyclophosphamide.

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Filgrastim
Description: Autologous HSCT patients will receive 10 mcg/kg/day and allogeneic HSCT patients will receive 5 mcg/kg/day subcutaneous (SQ) or intravenous (IV) starting 2 days after the initiation of Cyclophosphamide.

Intervention type: RADIATION
Group type: ACTIVE_COMPARATOR
Intervention: Chemotherapy or Radiation therapy
Description: Chemotherapy - BCNU 15 mg/kg IV x 1 dose to be administered over 2 hours on Day -6 pre-HSCT. VP-16 60 mg/kg IV x 1 dose to be administered over 4 hours on Day -4.~Radiation - administered at a rate of \< 20 cGy/min in one of the following doses; 120 cGy/fraction are administered at no less than 4-hour intervals three times/day or 2 times/day for a total of 10 doses (1200 cGy) over 4 days (Day -8, -7, -6 and -5), or doses of 150 cGy/fraction twice daily for a total of 8 doses (1200 cGy) over 4 days (Day -8, -7, -6 and -5). VP-16 60 mg/kg IV x 1 dose to be administered over 4 hours on Day -4 pre-HSCT.~Cyclophosphamide 100 mg/kg IV x 1 dose to be administered over 2 hours on Day -2 pre-HSCT. G-CSF 5 mcg/kg SQ or IV to start on Day +5 post-HSCT and continue until ANC \> 500/mm3 x 3 days.

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Non-myeloablative Conditioning regimen
Description: Fludarabine 30 mg/m2 IV x 3 doses total to be administered daily over 30 minutes on Days -6, -5 and -4 pre-HSCT. Cyclophosphamide 750 mg/m IV x 3 doses total to be administered daily over 1 hour on Days -6, -5 and -4 pre-HSCT. Administer cyclophosphamide approximately 4 hours after start of fludarabine infusion. Rituximab 375 mg/m2 IV x 4 doses total to be administered on Days -13 and -6 pre HSCT and Days +1 and +8 post HSCT.

Intervention type: PROCEDURE
Group type: ACTIVE_COMPARATOR
Intervention: Allogeneic transplant
Description: Infusion of G-CSF mobilized allogeneic hematopoietic stem cells

Intervention type: PROCEDURE
Group type: ACTIVE_COMPARATOR
Intervention: Autologous transplant
Description: Infusion of G-CSF mobilized autologous hematopoietic stem cells

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: Rituximab maintenance therapy
Description: Patients must have sufficiently recovered from autologous HSCT in order to receive rituximab maintenance therapy as specified below:~Dose #1: Day +42 post-autologous HSCT Dose #2: Day +49 post-autologous HSCT Dose #3: Day +56 post-autologous HSCT Dose #4: Day +63 post-autologous HSCT

Intervention type: DRUG
Group type: ACTIVE_COMPARATOR
Intervention: GVHD Prophylaxis
Description: Tacrolimus 0.09 mg/kg/day PO, based on body weight formulas will start on Day -2 and continue until Day +90 post-HSCT. Tacrolimus (or cyclosporine, if applicable) will be given orally in a twice-daily divided dose. Methotrexate 5 mg/m2 Intravenous Pyelogram (IVP) will be administered on Days +1, +3 and +6 post-HSCT.