FLT3 and acute myeloid leukemia: The most common fusion genes of FLT3-ITD AML included seven MLL-rearranged (13.5%) (four MLL-PTD, two MLL-AF9, and one MLL-ELL) and seven NUP98-rearranged (13.5%) (four NUP98-NSD1 and three NUP98-HOX9A).