Rilvegostomig + Chemotherapy as Adjuvant Therapy for Biliary Tract Cancer After Resection (ARTEMIDE-Biliary01)

Inclusion Criteria:

Histologically confirmed adenocarcinoma of the biliary tract (intrahepatic or extrahepatic) after macroscopically complete resection (R0 or R1)
Provision of a tumor sample collected at surgical resection.
Randomization within 12 weeks after resection with adequate healing and removal of drains.
Confirmed to be disease-free by imaging within 28 days prior to randomization.
Eastern Cooperative Oncology Group performance status of 0 or 1

Exclusion Criteria:

Participants with locally-advanced, unresectable, or metastatic disease at initial diagnosis.
Ampullary cancer, neuroendocrine, mixed neuroendocrine and non-neuroendocrine neoplasms and nonepithelial tumors.
Any anti-cancer therapy for BTC prior to surgery
Active or prior documented autoimmune or inflammatory disorders or any severe or uncontrolled systemic disease
Current or prior use of immunosuppressive medication within 14 days before the first dose
Thromboembolic event within 3 months
Active HBV or HCV infection unless treated.