FLT3 and acute myeloid leukemia: In vitro, TUS demonstrated potent killing of AML lines [concentration needed to reduce the growth of treated cells to half that of untreated cells (GI50) = 1.3–5.2 nmol/L] and Ba/F3 cells expressing WT (GI50 = 9.1 nmol/L) or various mutant forms of FLT3 (GI50 = 2.5–56 nmol/L).