The purpose of this study is to assess the safety of atezolizumab and bevacizumab, or atezolizumab alone, as first-line treatment in participants with unresectable, locally advanced or metastatic hepatocellular carcinoma (HCC) with Child-pugh B7 or B8 cirrhosis.
Locally advanced or metastatic and/or unresectable HCC with diagnosis confirmed by histology/cytology or clinically by American Association for the Study of Liver Diseases (AASLD) criteria in cirrhotic participants
Disease that is not amenable to curative surgical and/or locoregional therapies
No prior systemic treatment (including systemic investigational agents) for locally advanced or metastatic and/or unresectable HCC
Measurable disease (at least one untreated target lesion) according to Response Evaluation Criteria in Solid Tumors, Version 1.1 (RECIST v1.1)
Pregnancy or breastfeeding
Prior treatment with cluster of differentiation 137 (CD137) agonists or immune checkpoint blockade therapies
Treatment with investigational therapy within 28 days prior to initiation of study treatment
Treatment with locoregional therapy to liver within 28 days prior to initiation of study treatment, or non-recovery from side effects of any such procedure