Selumetinib and Azacitidine in High Risk Chronic Blood Cancers

"Patients will receive azacitidine 75 mg/m2 as a subcutaneous injection on days 1-7. The dose of azacitidine 75 mg/m2 will remain unchanged, unless a dose reduction is required based on toxicities (dose level -1 = selumetinib 50 mg PO twice daily and azacitidine 50 mg/m2).~Subjects will continue on this schedule in cycles of 28 days duration in the absence of disease progression"

"Patients will receive selumetinib administered by mouth on days 8-21. The starting dose cohort (dose level 1) will receive selumetinib 50 mg PO twice daily on days 8-21. Subsequent planned doses include selumetinib 75 mg PO twice daily (dose level 2) and selumetinib 100 mg PO twice daily (dose level 3). Subsequent dose levels will only be given once the prior dose level has shown acceptable safety.~Subjects will continue on this schedule in cycles of 28 days duration in the absence of disease progression."