Abstract

Background: In the registration trial for midostaurin (RATIFY) in intensively-treated FLT3-mutated acute myeloid leukaemia (FLT3-AML), day-21 bone marrow biopsy (D21-BMB) was protocolled. Those with persistent leukaemia (PL), as defined by a morphologic blast count ≥ 5% in a cellular (> 20%) marrow received a second induction (∼25% of participants).1 However, a similar D14-BMB early response assessment strategy is known to poorly predict overall induction outcomes.2 Our study aimed to assess the predictive value of D21-BMB on induction outcomes of our local FLT3-AML population treated intensively plus midostaurin.

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