Ph3 Randomized, Double-blinded, Placebo with Atezolizumab and Bevacizumab

This study is assessing the effectiveness and safety of tiragolumab, an anti-TIGIT monoclonal antibody, when given with atezolizumab and bevacizumab as a first-line treatment for unresectable, locally advanced or metastatic patients with hepatocellular carcinoma (HCC). TIGIT is thought to play an important role in HCC's response to immunotherapy treatments such as atezolizumab. This study will assess whether the addition of tiragolumab to atezolizumab and bevacizumab will improve response and clinical outcomes.