FLT3-Internal Tandem Duplication Allelic Ratio

**Semantic type:** Laboratory Procedure

**Definition:** A laboratory procedure used to determine the ratio of FLT3 alleles possessing an internal tandem duplication mutation (FLT3-ITD) compared to the number of wild-type FLT3 alleles in a bone marrow- or peripheral blood-derived sample.

**Synonyms:** - FLT3-ITD AR - ITD-AR