Analysis of microRNA expression by qRT-PCR in NK-AML samples compared to normal bone marrow found miR-155 to be significantly overexpressed in patients exhibiting the FLT3-ITD mutation (4.06- fold increase, p = 0.014), but not FLT3-WT (2.14-fold, p = 0.15) (Figure 1A). Here, FLT3 is linked to acute myeloid leukemia.