Adam Olszewski, MD, Brown University, Providence, RI, shares the preliminary results of the ongoing Phase I/II trial (NCT03677154) assessing the safety and efficacy of mosunetuzumab in patients with diffuse large B-cell lymphoma (BLBCL) who are intolerant to chemotherapy. Results show good efficacy, where 60% of patients achieved a response, of which 45% showed sustained complete response (CR). However, longer follow-up is required to assess the durability of CR. Mosunetuzumab showed a good safety profile, where 20% of patients exhibited grade 1, reversible cytokine release syndrome (CRS). This interview took place during the 62nd American Society of Hematology (ASH) Annual Meeting and Exposition, 2020.