FLT3 ITD
The most prevalent and clinically significant type of FLT3 mutation is an Internal Tandem Duplication (ITD) in the juxtamembrane domain of the receptor.
FLT3 ITD mutations are a heterogeneous type of mutation in location, size, and number. Research has shown FLT3 ITD mutations associated with higher concentrations of leukemic cells, increased incidence of relapse, and decreased overall survival.
Knowing the FLT3 mutation status can help stratify patients into groups that will receive different post-remission treatments.
The signal ratio has been demonstrated to provide prognostic value in both adult and pediatric AML patients. Patients with high FLT3 ITD signal ratios are likely to have less favorable outcomes.