Abstract
Acute myelogenous leukemia (AML) can be separated by whether the presentation was proceeded by a myelodysplastic (MDS related AML) or developed de novo (dAML). Clinically, MDS related AML (mAML) has been considered to have a worse prognosis that dAML. The objective of this literature review was to identify unique biologic features of mAML. Compared to dAML, mAML is characterized by an altered immunophenotype (increased frequency of CD34, CD11b and CD25), lack of leukemic progenitor cell suppression due to TGFβ1, increased bcl-2 expression, presence of inducible nitric oxide synthase, lower levels or mrp transcripts and increased expression of p53. Possible interpretations of these differences between mAML and dAML are presented. Implications for mAML directed therapy are discussed.
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