High-Dose Chemotherapy in Treating Patients Undergoing Stem Cell Transplant for Recurrent or Refractory Hodgkin's Lymphoma

High-Dose Chemotherapy in Treating Patients Undergoing Stem Cell Transplant for Recurrent or Refractory Hodgkin's Lymphoma

RATIONALE: Giving high-dose chemotherapy before a peripheral blood stem cell transplant stops the growth of cancer cells by stopping them from dividing or by killing them. Giving colony-stimulating factors, such as G-CSF, helps stem cells move from the bone marrow to the blood so they can be collected and stored. The stem cells are then returned to the patient to replace the blood-forming cells that were destroyed by high-dose chemotherapy and radiation therapy. PURPOSE: This clinical trial is studying the side effects and how well high-dose chemotherapy works in treating patients undergoing stem cell transplant for recurrent or refractory Hodgkin's lymphoma.

OBJECTIVES: To evaluate the feasibility and toxicity of high-dose sequential therapy comprising high-dose etoposide and cyclophosphamide with filgrastim (G-CSF) support followed by 2 courses of high-dose therapy and autologous stem cell transplantation in patients with poor-risk recurrent or refractory Hodgkin lymphoma. To analyze the response rate, progression-free survival, and overall survival of patients treated with this regimen. To determine the percentage of patients who can achieve a minimal disease status after two courses of Hodgkin lymphoma chemotherapy and before "classical autologous stem cell transplantation." OUTLINE: First high-dose chemotherapy*: Patients receive high-dose cyclophosphamide IV over 2 hours followed by etoposide IV over 4 hours. NOTE: *Patients with minimal disease (i.e., a single lymph node ≤ 2 cm in maximal horizontal diameter or a > 75% reduction in a bulky (≥ 10 cm) tumor mass AND no morphological evidence of active bone marrow disease) at initial evaluation do not receive the first high-dose chemotherapy but proceed directly to peripheral blood stem cell (PBSC) mobilization with filgrastim (G-CSF) for 3 days and PBSC collection beginning on day 4. Peripheral stem cell mobilization and collection: Patients receive G-CSF subcutaneously beginning 96 hours after completion of etoposide and continuing through completion of PBSC collection. Patients undergo leukapheresis to collect PBSC for reinfusion after additional high-dose therapy. Second high-dose chemotherapy: Patients receive high-dose melphalan IV over 30 minutes on day -1. First PBSC infusion: At least 24 hours after completion of melphalan, patients undergo reinfusion of PBSC on day 0. Local radiotherapy: Patients with a localized tumor mass > 5 cm after the second course of chemotherapy or a previous history of bulky disease (> 10 cm or mediastinal mass > 1/3 of transverse thoracic diameter) that has not been irradiated may receive local radiotherapy for 2 weeks, at the discretion of the principal investigator. High-dose therapy: Eight to 12 weeks after completion of the second course of chemotherapy, patients receive 1 of 2 regimens. Regimen A: Patients undergo fractionated total body irradiation 3 times daily on days -8 to -5 (10 fractions) and receive high-dose etoposide IV over 4 hours on day -4 and cyclophosphamide IV on day -2. Regimen B: Patients receive high-dose carmustine IV over 4 hours on days -7 to -5 and etoposide and cyclophosphamide as in regimen A. Second PBSC infusion: At least 48 hours after completion of cyclophosphamide, patients undergo reinfusion of PBSC on day 0. After completion of study therapy, patients are followed at day 60 and then every 3 months for up to 1 year.

DISEASE CHARACTERISTICS: Histologically confirmed Hodgkin lymphoma Diagnosis reviewed by the participating institution Failed to achieve complete remission (CR) after first-line chemotherapy or chemoradiotherapy (i.e., induction failure) OR not felt to be curable by radiotherapy alone Relapsed after standard chemotherapy regimen for Hodgkin lymphoma AND has ≥ 1 of the following poor-risk features: Extranodal disease at relapse Interval from first CR to relapse < 12 months B symptoms at relapse Chemo-resistant relapse OR failure to achieve a second CR with conventional nontransplantation salvage chemotherapy regimen No cytogenetic abnormality on cytogenetic analysis of bone marrow PATIENT CHARACTERISTICS: Inclusion criteria: SWOG performance status 0-1 LVEF > 50% by 2D-ECHO or MUGA scan Patients with LVEF between 45-50% and without wall motion abnormalities are assessed on an individual basis after consultation with the cardiologist FEV_1 or DLCO > 45% predicted Creatinine clearance > 60 mL/min HIV-negative Hepatitis B surface antigen-negative Hepatitis C virus-negative ALT ≤ 5 times upper limit of normal No inadequate vital organ function No active infection Fertile patients must use adequate contraception PRIOR CONCURRENT THERAPY: See Disease Characteristics Concurrent, post-transplantation, consolidative radiotherapy to residual masses allowed provided the patient has engrafted with a WBC > 4,000/μL and a platelet count > 100,000/μL