Four weeks after completion of adjuvant chemotherapy (day 28 from day 1 of last cycle of chemotherapy), the patient will continue his/her treatment plan with 6 cycles of 5-azacitidine. To be eligible for this part of the study, patient must have no evidence of disease (NED). Thus, patient will be assessed by CT scan chest/abdomen/pelvis with and without intravenous contrast prior to initiating Part B. In case of iodine allergy/anaphylaxis history, patient will be assessed with MRI. Progression of disease will be defined by RECIST criteria.