Autologous Peripheral Stem Cell Transplant in Treating Patients With Non-Hodgkin's Lymphoma or Hodgkin's Lymphoma

Day -6, 300 mg/m\^2 over 2 hour

"NHL with radiation: Cyclophosphamide 60 mg/kg intravenous (IV) over two hours daily x 2 days.~HL without radiation: Cyclophosphamide, Days - 6 through -3, 1.5 gm/m\^2 over 2 hours daily x 4 days.~Cyclophosphamide will be dosed based on actual body weight (ABW) unless the patient is 20% or more of ideal body weight (IBW). If more than 20% of ideal body weight, an adjusted ideal body weight (AIBW) will be used for dosing."

"NHL without radiation and cyclophosphamide: Etoposide 100 mg/m2 IV over 2 hours twice daily on Day -5 through -2.~HL without radiation: 150 mg/m\^2 intravenously over 4 hours every 12 hours for 6 total doses on Days -6 through -4."

Day 0 infuse PBSC. All patients will have PBSC collected by leukapheresis. Mobilization will be done with G-CSF alone (filgrastim) or using ifosfamide/carboplatin/etoposide and with or without rituximab. Leukapheresis is to begin on Day 5.

"Patients undergo total body irradiation (TBI) twice daily on days -4 to -1.~* \> 1000 cGy to whole lung, kidney, or abdominal bath.~* \> 3000 cGy to spinal cord, myocardium, mediastinum, lumbar periaortic lymph nodes.~* \> 3600 cGy to whole brain."

"Day 5: Begin G-CSF 5μg/kg/day subcutaneously (SQ) rounded to the nearest vial size.~Continue G-CSF until absolute neutrophil count (ANC) \> 1500/μl x 3 consecutive days.~If ANC falls \<1000/μL, restart G-CSF."

100 mg/m\^2 over one hour BID on days -6 through -2 of BEAM conditioning regimen.