Our previous observation of a higher incidence of FLT3-ITD in DR(-) M1/M2 AML than in DR(+) M1/M2 led to an investigation of NPM1 mutation in the same samples, since DR(-) AML and AML with NPM1 mutation share such characteristics as normal karyotype, the absence of CD34, and FLT3-ITD. NPM1 mutation was found in 18 of 26 (69.2%) of DR(-) cases, but not in any of 28 DR(+) cases. FLT3-ITD was noted in 66.7% of the cases with NPM1 mutation. These findings point to DR negativity as another phenotypic feature of AML with NPM1 mutation.
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| http://dx.doi.org/10.1016/j.leukres.2007.11.017 | DOI Listing |
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