Abstract
Patients with diffuse large B-cell lymphoma (DLBCL) who are very elderly or have poor performance status are difficult to treat with a full course of R-CHOP (rituximab plus cyclophosphamide/doxorubicin/vincristine/ prednisone) therapy. In this phase II trial, we treated this group of patients with a novel regimen containing 3 courses of rituximab/chemotherapy followed by maintenance rituximab. Patients with newly diagnosed stage II-IV DLBCL were eligible if they were considered poor candidates for 6-8 cycles of R-CHOP therapy. Patients who were eligible for anthracycline therapy received 3 cycles of rituximab plus cyclophosphamide/ mitoxantrone/vincristine/prednisone (CNOP); the remainder of patients received R-CVP (rituximab plus cyclophosphamide/ vincristine/prednisone). Patients without progression after completion of 3 cycles received 4 courses of maintenance rituximab (375 mg/m2 weekly x 4, repeated every 6 months) for 24 months. Between May 2003 and July 2007, 51 patients were enrolled. The median age was 78 years, and 43% of patients were > 80 years of age. Nineteen patients (37%) had Eastern Cooperative Oncology Group performance status of 2, and 72% had high-intermediate or high-risk International Prognostic Index scores. After a median follow-up of 48 months, the 2-, 3-, and 4-year progression-free survival rates are 71%, 65%, and 56%, respectively. The 2-, 3-, and 4-year overall survival rates are 72%, 67%, and 67%, respectively. Treatment was well tolerated, with few severe toxicities and no treatment-related deaths. This abbreviated course of rituximab/chemotherapy, followed by maintenance rituximab, was active and well tolerated in these very elderly patients. Brief-duration rituximab/chemotherapy as well as maintenance rituximab merit further evaluation in this setting.
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