Mosunetuzumab in Combination With Platinum-Based Salvage Chemotherapy in Patients With Relapsed/Refractory Aggressive B Cell Lymphoma

This is a two-arm, open-label, phase Ib single-site study with expansion cohorts testing the addition of mosunetuzumab to intensive platinum-based salvage chemotherapy in patients with relapsed/refractory aggressive B cell lymphoma. The hypothesis of this study is that mosunetuzumab can be safely combined with platinum-based salvage chemotherapy in this patient population, and that this approach may outperform chemoimmunotherapy approaches that instead incorporate rituximab retreatment. The enrolling physician's choice of the chemotherapy backbone will determine a patient's assigned study arm (Arm A = DHAX, Arm B = ICE). The two arms will accrue patients to phase Ib independently.