Efficacy and Safety of Polatuzumab Vedotin in Combination With Zanubrutinib, Rituximab, Cyclophosphamide, Doxorubicin, and Prednisone in Patients With Previously Untreated Diffuse Large B-Cell Lymphoma of the MCD/BN2/N1 Subtypes

This is a prospective, open-label, single-arm, single-center, Phase II clinical study designed to evaluate the efficacy and safety of Efficacy and Safety of Polatuzumab Vedotin in Combination With Zanubrutinib, Rituximab, Cyclophosphamide, Doxorubicin, and Prednisone in Patients With Previously Untreated Diffuse Large B-Cell Lymphoma of the MCD/BN2/N1 Subtypes.

After successful screening, enrolled patients will receive 6 treatment cycles (21 days per cycle). Disease response will be assessed by CT/PET-CT during treatment and after completion of induction. Patients who achieve CR/PR/SD will proceed to the maintenance phase; patients who do not achieve at least SD (i.e., fail to reach CR/PR/SD) during induction will discontinue the study. Patients with CR/PR/SD after induction will receive maintenance therapy with zanubrutinib plus tislelizumab until disease progression, unacceptable toxicity, or completion of 1 year of maintenance.

Efficacy and safety assessments will be performed per protocol. Tumor response will be assessed by site investigators according to the 2014 Lugano criteria, including determination of response status, date of response, and date of progression/relapse.