RecruitingDrug trialDurvalumab in Different Combinations With Pralatrexate, Romidepsin and Oral 5-Azacitidine for LymphomaThis is an open-label, Phase 1/2a, dose-finding study with an initial phase 1 portion, articulated in four separate treatment arms, followed by a dedicated phase 2 for qualifying treatment Arm(s). The primary objective of the Phase 1 portion is to determine the maximum tolerated dose (MTD) and dose limiting toxicity (DLT) of the combinations of: Durvalumab, oral 5-azacitidine, and romidepsin (Arm A); durvalumab, pralatrexate, and romidepsin (Arm B); durvalumab and romidepsin (Arm C); or durvalumab and oral 5-azacitidine (Arm D), in patients with peripheral T-cell lymphoma (PTCL). The safety and toxicity profile of these combinations will be evaluated throughout the entire study. If one or more of the combinations in Arms A, B, C, or D are found to be feasible and an MTD is established, the phase 2 portion of the study will be initiated for the combination(s) with the strongest efficacy signal provided acceptable toxicity.