High prevalence of morphological subtype FAB M1 in adults with de novo acute myeloid leukemia in São José dos Campos, São Paulo.

Context And Objective: Geographical variations have been described in acute myelogenous leukemia (AML). In Brazil, few studies have been published on this. The aim of this study was to demonstrate the high prevalence of French-American-British (FAB) M1 subtype in adults with de novo AML in São José dos Campos, State of São Paulo, Brazil.