Decitabine and Midostaurin in Treating Older Patients With Newly Diagnosed Acute Myeloid Leukemia

Inclusion Criteria:

* Newly-diagnosed acute myeloid leukemia (AML) per the World Health Organization \[WHO\] 2008 classification \[except t (15; 17)\], including:

* De novo AML
* Secondary AML
* Secondary AML arising from previously-diagnosed myelodysplastic syndromes (MDS) treated with deoxyribonucleic acid (DNA) methyltransferase inhibitor (DNMTi) (ie, decitabine or azacitidine)
* FLT3-ITD mutation confirmed in bone marrow aspirate
* Eastern Cooperative Oncology Group (ECOG) performance status ≤ 2
* Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) ≤ 2.5 x upper limit of normal (ULN)
* Serum bilirubin ≤ 2.5 ULN
* Serum creatinine ≤ 1.5 mg/dL and/or creatinine clearance ≥ 50 mL/min
* Ejection fraction ≥ 50% by echocardiogram
* Unwillingness or inability to receive conventional chemotherapy
* Ability to understand and the willingness to sign a written informed consent document
* Ability to adhere to the study visit schedule and other protocol requirements
* Life expectancy \> 2 months

Exclusion Criteria:

* Receiving concomitant treatment with other anti-neoplastic agents (EXCEPTION: hydroxyurea). Prior treatment with DNMTi therapy (ie, decitabine or azacitidine) for MDS is allowed
* Received anti-neoplastic treatment within 4 weeks prior to enrollment (EXCEPTION: hydroxyurea)
* Received any surgical procedure, excluding central venous catheter placement or other minor procedures (eg, skin biopsy) within 14 days of study day 1
* Received any investigational agent within 4 weeks prior to enrollment
* Previous or current history of a myeloproliferative disease
* Known active central nervous system (CNS) malignancy
* Any other known disease (except carcinoma in-situ), concurrent severe and/or uncontrolled medical condition which could compromise participation in the study (eg, uncontrolled diabetes; cardiovascular disease including congestive heart failure; myocardial infarction within 6 months with poorly controlled hypertension; chronic renal disease; active uncontrolled infection)
* Active opportunistic infection or treatment for opportunistic infection within 4 weeks of first day of study drug dosing
* Known confirmed diagnosis of human immunodeficiency virus (HIV) infection or active viral hepatitis
* Known impairment of gastrointestinal (GI) function or GI disease that may significantly alter the absorption of midostaurin
* History of allergic reactions attributed to compounds of similar chemical or biologic composition to midostaurin and/or decitabine
* Impaired cardiac function including any of the following:

* Screening electrocardiogram (ECG) with a corrected QT interval (QTc) \> 450 msec
* Bradycardia defined as heart rate (HR) \< 50 beats per minute (bpm)
* Right bundle branch block + left anterior hemiblock (bifascicular block)
* Patients with myocardial infarction or unstable angina \< 3 months prior to starting study drug
* Congestive heart failure (CHF) New York (NY) Heart Association class 3 or 4
* Inability to swallow or absorb drug
* Other medical or psychiatric illness or organ dysfunction or laboratory abnormality which in the opinion of the investigator would compromise the patient's safety or interfere with data interpretation
* Unwillingness or inability to comply with the protocol
* Pregnant
* nursing (lactating)
* Women of child-bearing potential, defined as all women physiologically capable of becoming pregnant, UNLESS they are using highly effective methods of contraception during dosing and for 3 months after midostaurin medication; highly effective contraception methods as follows:

* Total abstinence, when this is in line with the preferred and usual lifestyle of the subject \[periodic abstinence (eg, calendar, ovulation, symptothermal, post-ovulation methods) and withdrawal are not acceptable methods of contraception\]
* Female sterilization (surgical bilateral oophorectomy with or without hysterectomy; or tubal ligation at least six weeks before taking study treatment). In case of oophorectomy alone, reproductive status must be confirmed by follow-up hormone level assessment
* Male sterilization, at least 6 months prior to screening (for female subjects on the study, the vasectomized male partner should be the sole partner for that subject)
* Combination of any two of the following (a+b or a+c, or b+c):

* Use of oral, injected or implanted hormonal methods of contraception or other forms of hormonal contraception that have comparable efficacy (failure rate \< 1%), eg, hormone vaginal ring or transdermal hormone contraception. For oral contraception, women should have been stable on the same pill for a minimum of 3 months before taking study treatment
* Placement of an intrauterine device (IUD) or intrauterine system (IUS)
* Barrier methods of contraception: Condom or Occlusive cap (diaphragm or cervical/vault caps) with spermicidal foam/gel/film/cream/vaginal suppository