6-Azauracil was studied in patients with "advanced" acute leukemia, refractory to standard chemotherapy. Under the conditions of the study this compound was found to have no significant antileukemic activity. As a result, these data have defined the natural history of this phase of acute leukemia. A significant proportion (30 per cent) of these patients showed objective hematologic improvement even in the absence of effective specific therapy, which might be ascribed to a prospective new agent. The median survival from the onset of the study of this group of patients was two months, and survival patterns for adults and children were similar.

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© 1960 by American Society of Hematology, Inc.
1960
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