Mosunetuzumab: First Approval.

Mosunetuzumab (Lunsumio), an anti-CD20/CD3 T-cell engaging bispecific antibody, is being developed by Roche for the treatment of relapsed or refractory follicular lymphoma. Mosunetuzumab was recently conditionally approved in the EU for the treatment of relapsed or refractory follicular lymphoma in adults who have received at least two prior systemic therapies. This article summarizes the milestones in the development of mosunetuzumab leading to this first approval for relapsed or refractory follicular lymphoma.