RecruitingPhase 2Drug trialEvaluation of the Efficacy and Safety of Polatuzumab Vedotin Combined With Rituximab, Gemcitabine, and Oxaliplatin (Pola-R-GemOx) as Salvage Therapy for Relapsed/Refractory Diffuse Large B-Cell Lymphoma (DLBCL) Patients Ineligible for Autologous TransplantationThis is a prospective, multicenter, single-arm clinical study designed to evaluate the efficacy and safety of Polatuzumab Vedotin combined with Rituximab, Gemcitabine, and Oxaliplatin (Pola-R-GemOx) as salvage therapy for relapsed/refractory Diffuse Large B-Cell Lymphoma (DLBCL) patients ineligible for autologous transplantation.