Treatment of histiocytic and mixed lymphomas.A comparison of two, three and four drug chemotherapy

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Abstract
The Eastern Cooperative Oncology Group has studied 187 patients with generalized progressive malignant lymphoma classified as having the histologic sub-types histiocytic or mixed. Histology review by the Pathology Panel for Lymphoma Clinical Trials demonstrated a 31% disparity with contributing institution's pathologists in regard to cell type, but good agreement with interpretation of nodular or diffuse nodal pattern. Patients were assigned at random to treatment with cyclophosphamide 1 g/m2 on day 1 and prednisone 100 mg/m2 daily for five days (CP); CP plus vincristine 1 mg/m2 on day 1 (CVP); or CVP plus BCNU 60 mg/m2 on day 1 (BCVP). Chemotherapy was given for nine, twenty-one day cycles. The observed complete remission rates were CP-21%, CVP 34%, BCVP 34%. Both CVP and BCVP had significantly more complete remissions than CP, but survival following CVP (118 weeks) was significantly longer than that following either BCVP (76 weeks) or CP (74 weeks). Histologic sub-type, lymph node pattern, response to chemotherapy, performance status and stage of disease were also found to influence survival.