Stage IV diffuse large-cell lymphoma: a long-term analysis.

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Abstract
A long-term analysis of the clinical outcome of previously untreated adult patients who presented with stage IV diffuse large-cell lymphoma at diagnosis was performed to identify possible prognostic factors. Sixty-one patients were seen between 1974 and 1981; all were treated with cyclophosphamide, doxorubicin, vincristine, prednisone, and bleomycin followed by cyclophosphamide, vincristine, prednisone, and bleomycin for a total of 1 yr. Overall 5 yr survival was 48.5%, with a median follow-up of 53 months. Of the 56 patients evaluable for remission status, 41 achieved a complete remission, and 27 are alive and disease free. Clinical factors of prognostic importance of survival included age, constitutional symptoms, lactate dehydrogenase (LDH) level, presence of mediastinal disease, large-cell infiltration of bone marrow, and number of extranodal sites of disease. The proportional hazards model then identified age, number of extranodal sites, and, to a lesser extent, serum LDH level as independent risk factors for survival. Four distinct patient risk groups were identified using these 3 factors. Younger patients with only 1 extranodal site of disease and normal LDH levels responded well on this therapy, with 100% alive at 5 yr. Survival was < 30% at 5 yr for patients in the lowest risk group. There were 11 relapses: LDH level, constitutional symptoms, and mediastinal disease predicted for relapse. Knowledge of these risk factors permits individualization of treatment planning and allows more meaningful comparisons with the results of treatment studies using other intensive regimens.