FLT3 and acute myeloid leukemia: In order to assess the impact of FLT3‐ITD abundance on antigen expression, the patients were grouped for each parameter into two cohorts using the following threshold values: (a) 0.5 for the AR, according to current AML guidelines; (b) 0.7 for the FLT3‐ITD/FLT3‐WT mRNA ratio (RR); and (c) 1.3 for the FLT3‐ITD RR/AR ratio. We found higher values of CD33 for RR/AR ≥1.3, and no other statistical differences between CD7, CD33 and CD123 levels of the other FLT3‐ITD groups.