Treatment of hairy cell leukemia (leukemic reticuloendotheliosis) II. Chlorambucil therapy in postsplenectomy patients with progressive disease

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Abstract
Four postsplenectomy patients with progressive hairy cell leukemia were treated with daily low doses of an alkylating agent (chlorambucil, 4 mg). An objective response, measured by improvement in blood counts in four patients as well as decreased bone marrow involvement on core biopsy in three patients, could be documented within 6 mo. It is important to identify the postsplenectomy patient with progressive disease as early as possible in order to initiate low-dose single agent chemotherapy and have the time necessary to effect an objective response.