RecruitingPhase 2Drug trialA Phase II Study of the Combination of Azacitidine and Pembrolizumab for Patients Relapsed/Refractory Hodgkin's LymphomaThis study is a Phase II single-center clinical trial designed to assess the efficacy, safety, and tolerability of pembrolizumab in combination with the 7-day regimen of azacitidine for the treatment of relapsed/refractory HL.