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The progressive improvement in the prognosis of acute lymphocytic leukemia has been a result of two major developments: 1) the more efficient use of chemotherapeutic agents, particularly the use of combinations of agents and the discovery that agents effective at one stage of disease may be inappropriate at another stage, and 2) the prevention with irradiation of central nervous system relapse. As many as one-half of children with this disease may enjoy long-term leukemia-free survival. However, further studies are needed to improve the efficacy and reduce the toxicity of therapy. This paper reviews the evolution of some of these studies.
Simone et al. (Wed,) studied this question.
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