Patients who have disease progression after one cycle of therapy or at any time thereafter are taken off the study. Patients with a complete response after 1 cycle of therapy receive 2 additional cycles of chemotherapy and are observed off treatment. Patients with a partial response (PR) also receive 2 additional cycles of chemotherapy. Following the third cycle of chemotherapy, if residual disease is confined to 1 or 2 nodal sites, patients receive radiation therapy. All other patients with a PR are treated at investigator's discretion.