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Development of an effective treatment program for childhood acute lymphocytic leukemia: a preliminary report.

The development of an effective therapeutic regimen for acute lymphocytic leukemia (ALL) of childhood is described. By careful surveillance of toxicity and efficacy, positive modifications of treatment strategy were achieved without resorting to classically randomized trails. Teh resultant protocol utilizes vincristine-prednisone induction followed by asparaginase consolidation, intensive intermittent combination maintenance chemotherapy with adriamycin as a major component, and cranial radiotherapy plus intrathecal methotrexate for central nervous system prophylaxis. Preliminary analysis suggests that this regimen may result in prolonged continuous complete remission in at least 80% of children with ALL.