Decitabine Followed by Mitoxantrone Hydrochloride, Etoposide, and Cytarabine in Treating Patients With Relapsed or Refractory Acute Myeloid Leukemia or High-Risk Myelodysplastic Syndromes

Inclusion Criteria

• •Prior diagnosis of "high-risk" myelodysplastic syndrome (MDS) (\>= 10% blasts) or AML other than acute promyelocytic leukemia (APL) with t(15;17) (q22;q12) or variants according to the 2008 World Health Organization (WHO) classification; patients with biphenotypic AML are eligible
• •Relapsed/persistent disease according to standard criteria requiring salvage therapy; outside diagnostic material is acceptable as long as peripheral blood and/or bone marrow slides are reviewed at the study institution; flow cytometric analysis of peripheral blood and/or bone marrow should be performed according to institutional practice guidelines
• •Treatment-related mortality (TRM) score =\< 9.2 as calculated with simplified model
• •Should be off any active therapy for AML with the exception of hydroxyurea for at least 14 days prior to study registration unless patient has rapidly progressive disease, and all grade 2-4 non-hematologic toxicities should have resolved
• •May have previously received monotherapy with demethylating agents for MDS or AML
• •May have previously received chemotherapy with MEC for MDS or AML
• •Patients with symptoms/signs of hyperleukocytosis or white blood cells (WBC) \> 100,000/uL can be treated with leukapheresis or may receive up to 2 doses of cytarabine (up to 500 mg/m\^2/dose) prior to enrollment
• •Bilirubin =\< 2 x institutional upper limit of normal (IULN) unless elevation is thought to be due to hepatic infiltration by AML, Gilbert's syndrome, or hemolysis (assessed within 7 days prior to study day 1)
• •Serum creatinine =\< 1.5 x IULN (assessed within 7 days prior to study day 1)
• •Left ventricular ejection fraction \>= 40%, assessed within 3 months prior to study day 1, e.g. by multi gated acquisition (MUGA) scan or echocardiography, or other appropriate diagnostic modality and no clinical evidence of congestive heart failure; if the patient had anthracycline-based therapy since the most recent cardiac assessment, cardiac evaluation should be repeated if there is clinical or radiographical suspicion of cardiac dysfunction, or if the previous cardiac assessment was abnormal
• •Women of childbearing potential and men must agree to use adequate contraception
• •Provide written informed consent