A comparison of the 88 KMT2A/MLL-R+ pediatric AML cases with 47 FLT3-ITD+ pediatric AML cases showed 31 differentially expressed probesets, of which 24 probesets were significantly upregulated in pediatric KMT2A/MLL-R+ cases. The gene discussed is FLT3; the disease is acute myeloid leukemia.