Prevalence of FLT3/ITD and FLT3/ALM by age categories and by karyotype. (A) Prevalence of FLT3 mutations is presented for different age categories. Bars inside the box represent correspondence to the prevalence of FLT3 mutations in adults 18 to 55 years⁷  and older than 55 years⁵  as previously published. (B) Prevalence of FLT3 mutations is presented for each cytogenetic category. *Statistically significant difference compared with FLT3/WT.