Attention is being directed at increasing the intensity of therapy as a means of improving the results of primary therapy for non-Hodgkin's lymphoma. There is increasing evidence that the use of high-dose consolidation therapy followed by autologous hematopoietic rescue in first remission improves survival in high-risk patients. There is also evidence from randomized trials that transplantation for relapsed patients improves survival compared with conventional salvage chemotherapy. Phase II trials of radiolabeled antibody therapy are providing promising results. There is still no definitive evidence that any treatment of advanced low-grade lymphoma prolongs survival, although the use of allogeneic bone marrow transplantation is under investigation. Treatment designed to eradicate Helicobacter pylori can cause regression in approximately 50% of patients with gastric lymphomas of mucosa- associated lymphoid tissue, although long-term follow-up information is lacking. The results of treatment for mantle cell lymphoma are poor and there is no consensus on management. Most trials of primary central nervous system lymphoma are employing systemic chemotherapy with drugs that penetrate the blood-brain barrier in addition to radiation.
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