Subjects will be randomized to Y-90 TARE alone (Arm A) or Y-90 TARE followed by the combination of atezolizumab and bevacizumab (Arm B). The first 10 subjects randomized to Arm B (Y-90 TARE + bevacizumab + atezolizumab) will be assessed for safety after two cycles. If there are no Grade ≥ 3 unexpected toxicities; possibly, probably or definitely related to TARE in combination with bevacizumab and atezolizumab the combination will be deemed safe and accrual will resume.~Subjects randomized to receive bevacizumab and atezolizumab (Arm B) will start the combination of bevacizumab and atezolizumab 4 weeks (± 1 week) after TARE treatment. Full recovery from the procedure is required prior to systemic treatment:~AST and ALT ≤ 5 x upper limit of normal (ULN) and total bilirubin ≤ 3 mg/dL~Manifestations of post-embolization syndrome (e.g., fever, nausea, vomiting, and abdominal pain) have resolved to National Cancer Institute Common Terminology Criteria for Adverse Events, Version 5.0 Grade 1~No significant medical events (e.g., gastrointestinal [GI] bleeding, cardiac events, hepatorenal syndrome) during or after the TARE procedure.~Arm B subjects will continue the study drugs for a total of 24 months from the TARE treatment, until intolerable toxicity or disease progression occur.
This is an open-label, multi-center, randomized phase II study comparing the Y90 TARE followed by bevacizumab and atezolizumab treatment to the Y90 TARE treatment alone in unresectable advanced stage HCC.