Trial to Improve Outcomes in Patients With Resected Pancreatic Cancer (Azacitidine)

Inclusion Criteria: * Understand and voluntarily sign an informed consent form. * Age greater than or 18 years at the time of signing the informed consent form. * Able to adhere to the study visit schedule and other protocol requirements. * Subjects must have a histologically confirmed pancreatic adenocarcinoma that has had an R0 (negative margins) or R1 (microscopically positive margins) resection. * Subjects must have finished adjuvant therapy, which can include chemotherapy and/or chemoradiation therapy or have been determined to be unable to take adjuvant therapy. Although patients will be expected to complete chemoradiation or chemotherapy per physician recommendations, patients who are unable to complete chemotherapy ± radiation therapy secondary to dose limiting toxicities will be eligible provided they meet study criteria. * Subjects enrolled due to node + disease or R1 resection must be able to undergo randomization within 3 months of finishing adjuvant therapy or the decision that they are unable to take adjuvant therapy. Patients enrolling due to CA 19-9 elevations can enroll any time after adjuvant therapy has completed. * All previous cancer therapy including radiation, chemotherapy, and surgery, must have been discontinued at least 4 weeks prior to treatment in this study * Subjects must either have a CA 19-9 value \> the institutional ULN on two separate checks at least 2 weeks apart OR have had an R1 resection margin OR N1 nodal disease regardless of CA 19-9 level * Subjects must be free of visible disease on imaging (CT, PETCT or MRI) evaluating chest, abdomen, and pelvis within 28 days of enrollment on the study. * Life expectancy of greater than 12 weeks * ECOG performance status of less than or equal to 1 at study entry * Subjects must have normal organ and marrow function * Free of prior malignancies for greater than or equal to 5 years with exception of currently treated basal cell, squamous cell carcinoma of the skin, or carcinoma in situ of the cervix or breast. * Women of childbearing potential should be advised to avoid becoming pregnant and men should be advised to not father a child while receiving treatment with CC-486 or nab-paclitaxel. All men and women of childbearing potential must use effective methods of birth control throughout the study and for three months after completing treatment. * Women of childbearing potential must have a negative serum or urine β-hCG pregnancy test at screening. * Subjects must have \< Grade 2 pre-existing peripheral neuropathy (per CTCAE) Exclusion Criteria: * Any serious medical condition, laboratory abnormality, or psychiatric illness that would prevent the subject from signing the informed consent form. * Pregnant or breastfeeding women. * Use of any other chemotherapy, radiotherapy, or experimental drug or therapy within 4 weeks (6 weeks for nitrosoureas or mitomycin C) prior to enrollment on study or those who have not recovered from adverse events ≥ grade 1 due to agents administered more than 4 weeks earlier except for stable grade 2 neuropathy. * Subjects may not receive any other concomitant investigational agents. * Known or suspected hypersensitivity to 5-azacitidine or mannitol * Known positive for HIV or infectious hepatitis, type B or C. HIV patients are at increased risk of lethal infections when treated with marrow-suppressive therapy. * Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements. * Any known gastrointestinal disorders which would preclude oral administration of 5-azacitidine.