The present invention includes methods for treating a
human patient with Crenolanib, wherein the
human patient is suffering from a FLT3 mutated
leukemia, the method comprising: determining that the
human patient has a
poor prognosis by: obtaining or having obtained a
leukemia biological sample and performing or having performed a
genotyping assay on the biological sample to determine that the human patient has both a mutated FLT3 or a
constitutively active FLT3
mutant and one or more driver mutations in one or more epigenetic
regulator proteins that results in a loss of normal function of the epigenetic
regulator proteins which, indicates that the patient has a
poor prognosis; and administering to the patient determined to have the
poor prognosis a therapeutically effective amount of Crenolanib, or a pharmaceutically acceptable salt thereof having the formula:to treat the
leukemia.