RATIONALE-306 (NCT03783442) is a global, Phase 3, randomized, double-blind, placebo-controlled trial assessing tislelizumab plus chemotherapy versus placebo plus chemotherapy as first-line treatment in patients with advanced or metastatic esophageal squamous cell carcinoma (ESCC).

RATIONALE-302 (NCT03430843) is a global Phase 3 study of tislelizumab vs investigator-chosen chemotherapy as a second-line (2L) treatment for advanced unresectable/metastatic esophageal squamous cell carcinoma (ESCC).