CD99 and acute myeloid leukemia: The number of CD34/CD123/CD25/CD99+ LPCs, which corresponds to the LAIP of FLT3-ITDmut AML, was assessed using cytofluorimetry, and accounted for 0.15% of BM-MNCs only (median, range 0.001–12.4%), while CD34+ progenitors represented 0.07% of BM-MNCs (median, range 0.02–75.2%), p = 0.0005 (Fig. 2a).