Abstract
This study was designed to test the efficacy and toxicity of COP (cyclophosphamide, vincristine, and prednisone) and MOPP (nitrogen mustard, vincristine, prednisone, and procarbazine) in 13 previously untreated patients with disseminated, nodular, poorly differentiated, lymphocytic lymphoma, and to test for patient cross-resistance to the regimens. Complete remission was initially achieved in six of eight patients on COP and three of five on MOPP. Three patients were crossed over to the alternative induction regimen because of progressive disease after an initial partial response; one was crossed over because of toxicity. On crossover, four patients achieved complete remission, two on either regimen. Durations of unmaintained complete remission range from 6-46+ months, with 8/13 still in their first complete remission. Only one patient has died, while in remission, from progressive Kaposi's sarcoma; one was lost to follow-up while in complete remission at 44 months; the others (85%) remain alive 33-54 months from the initiation of chemotherapy. MOPP was significantly more toxic with respect to thrombocytopenia, duration of myelosuppression, and cumulation of toxicity. Because of its more acceptable toxicity, COP is recommended as initial therapy for patients with nodular, poorly differentiated, lymphocytic lymphoma. MOPP or another regimen of non-crossresistant combination chemotherapy would be more appropriate for primary treatment failures.
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