Case 1 is a 33-year-old female diagnosed with AML. Her karyotype was 45, X, -X, t(8;21)(q22;q22) (8)/46, XX, idem (2), AML1-ETO was 39700 copies/10000 abl copies (AML1-ETO transcripts were normalized to 104 abl copies), and KIT exon 17 and CSF3R mutations were detected...the disease relapsed, and she failed to achieve CR again after salvage chemotherapy with CLAG (cladribine 5 mg/m2 d1-5, cytarabine 2 mg/m2 d1-5, G-CSF 5 μg/kg d0-5).