Summary
This study will evaluate the safety, pharmacokinetics, and preliminary efficacy of
mosunetuzumab following first-line diffuse large B-cell lymphoma (DLBCL)
immunochemotherapy in participants with a best response of stable disease or partial
response, or in elderly/unfit participants with previously untreated DLBCL, or
subcutaneous mosunetuzumab in combination with polatuzumab vedotin IV in elderly/unfit
participants with previously untreated DLBCL.