Case 2 was a 35-year-old man. BM morphology and immunophenotyping identified AML. The karyotype was 46,XY,t(8;21)(q22;q22) (7), and AML1-ETO and KIT exon 17 mutations were detected. He was treated with a standard “7+3” IA regimen as induction with no remission (NR)...he experienced molecular relapse with AML1-ETO up to 18993 copies; KIT mutation status was positive...