Epigenetic Modulation in Relapsed/Refractory Follicular Lymphoma and Marginal Zone Lymphoma

This will be a prospective, non-randomized, un-blinded, phase 2 efficacy trial using an Immunomodulatory derivatives of thalidomide (IMiD™)compound and a hypomethylating agent for epigenetic targeted therapies in patients with relapsed/refractory follicular and marginal zone lymphoma. There will be two parts to the trial. Each patient will progress through each part of the study. Part 1: Sequential single agent therapy with azacitidine and lenalidomide. Each agent will be given for four-six 28-day cycles. Subjects with less than a complete response (CR) after 4 cycles of study drug in Part 1a or 1b should proceed to the next study drug(s) after the prescribed washout period. Subjects with a CR may receive up to 6 cycles of study drug and will not receive the next study drug(s) until there is evidence of progressive disease. There will be a 1-6 week 'washout' period between stopping and starting each agent in Part 1, unless rapid progression suggests holding therapy would not be in the patient's best interest. There will be no washout period required between Part 1 and Part 2. Part 2: Combination therapy with azacitidine and lenalidomide given in 28-day cycle for up to 13 cycles in subjects who have stable disease or better.