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Phase 2 study of cladribine followed by rituximab in patients with hairy cell leukemia.


ABSTRACT: We conducted this study to determine the feasibility and safety of cladribine followed by rituximab in patients with hairy cell leukemia including the vari-ant form (HCLv). Cladribine 5.6 mg/m² given IV over 2 hours daily for 5 days was followed ? 1 month later with rituximab 375 mg/m² IV weekly for 8 weeks. Responses were recorded and BM minimal residual disease (MRD) was evaluated after the completion of rituximab. Thirty-six patients have been treated including 5 with HCLv. Median age was 57 years (range, 37-89). All patients (100%) have achieved complete response (CR), defined as presence of no hairy cells in BM and blood with normalization of counts (absolute neutrophil count [ANC]> 1.5 × 10?/L, hemoglobin [Hgb] > 12.0 g/dL, platelets [PLT] > 100 × 10?/L), as well as resolution of splenomegaly. There were no grade 3 or 4 nonhematologic adverse events directly related to the treatment. Only 1 patient (with HCLv) has relapsed; median CR duration has not been reached (range,1+-63+ months). Three patients with HCLv died including 1 with relapsed disease and 2 from unrelated malignancies. Median survival duration has not been reached (range, 2+-64+ months). Treatment with cladribine followed by rituximab is effective tk;4and may increase CR rate. This study was registered at www.clinicaltrials.gov as NCT00412594.

SUBMITTER: Ravandi F 

PROVIDER: S-EPMC4081440 | biostudies-literature | 2011 Oct

REPOSITORIES: biostudies-literature

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We conducted this study to determine the feasibility and safety of cladribine followed by rituximab in patients with hairy cell leukemia including the vari-ant form (HCLv). Cladribine 5.6 mg/m² given IV over 2 hours daily for 5 days was followed ∼ 1 month later with rituximab 375 mg/m² IV weekly for 8 weeks. Responses were recorded and BM minimal residual disease (MRD) was evaluated after the completion of rituximab. Thirty-six patients have been treated including 5 with HCLv. Median age was 57  ...[more]

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