Study of Decitabine for Treatment of Older Patients With Acute Myeloid Leukemia (AML)

Inclusion Criteria: 1. A diagnosis of AML or transformed from myelodysplastic syndrome (MDS) within 2 weeks of study enrollment. 2. Ineligible to receive intensive chemotherapy for their disease. 3. Have not received any chemotherapy within 4 weeks of study enrollment and must have recovered from any treatment-related toxicities. Exclusion Criteria: 1. Received previous treatment for AML. 2. Previously received Vidaza. 3. Received any other investigational agents within 30 days of first dose of study drug. 4. Uncontrolled intercurrent illness. 5. Had radiotherapy within 14 days prior to study enrollment.