Radiolabeled Monoclonal Antibody Therapy and High-Dose Chemotherapy Followed By Autologous Peripheral Stem Cell Transplant in Treating Patients With Relapsed or Refractory Non-Hodgkin's Lymphoma

Given at a dose of 5 μg/kg, subcutaneously daily, beginning on Day 0 (stem cell transplant day) until white blood cells measure greater than 1500/ul.

Intravenous infusion of 250 mg/m2 on treatment days -22 and -14 (day 0 = stem cell transplant).

Part of high dose BEAM chemotherapy given on study (a combination of carmustine, etoposide, cytarabine, and melphalan). Carmustine is given at a dose of 300 mg/m2 intravenous infusion over a 2 hour period on treatment day -6 (Day 0 = stem cell transplant).

Part of high dose BEAM chemotherapy given on study (a combination of carmustine, etoposide, cytarabine, and melphalan). Cytarabine is given at a dose of 100 mg/m2 intravenous infusion over a 1 hour period, every 12 hours on treatment days -5, -4, -3, and -2, for a total of 8 doses (Day 0 = stem cell transplant).

Part of high dose BEAM chemotherapy given on study (a combination of carmustine, etoposide, cytarabine, and melphalan). Etoposide is given at a dose of 100 mg/m2 intravenous infusion over a 2 hour period every 12 hours on treatment days -5, -4, -3, and -2, for a total of 8 doses (Day 0 = stem cell transplant).

Part of high dose BEAM chemotherapy given on study (a combination of carmustine, etoposide, cytarabine, and melphalan). Melphalan is given at a dose of 140 mg/m2 as an intravenous infusion over a 1 hour period on treatment day -1 (Day 0 = stem cell transplant).

On day 0, a minimum of 2.0 X 106 CD34+ cells/kg unselected peripheral blood progenitor cells (PBPC) will be reinfused following institutional guidelines for the reinfusion procedure.

Patients will receive 90Y2B8 at a variable dose on treatment day -14 (Day 0 = stell cell transplant). The initial dose calculated to deliver no more than 100 cGy to critical organs (liver, lung). Doses will be escalated based on cohort of enrollment.