ORIENT-15: This phase III trial is tying to understand how safe and effective a targeted therapy is for the treatment of advanced oesophageal squamous cell carcinoma, when given in combination with chemotherapyA Multicenter, Double-Blind, Randomized Phase 3 Clinical Trial Evaluating the Efficacy and Safety of Sintilimab vs. Placebo, in Combination With Chemotherapy, for First-Line Treatment of Unresectable, Locally Advanced, Recurrent, or Metastatic Esophageal Squamous Cell Carcinoma

Exclusion

• ESCC with endoscopy-confirmed near-complete obstruction requiring interventional therapy
• Post stent implantation in the esophagus or trachea with risk of perforation
• Received systemic treatment for advanced or metastatic ESCC.
• Received a cumulative dose of cisplatin ≥ 300 mg/m2 and the last cisplatin dose was within 12 months of randomization or the first dose of study treatment in the open-label phase.
• High risk of hemorrhage or perforations due to tumor invasion in adjacent organs (aorta or trachea), or have fistula formation.
• Hepatic metastasis > 50% of the total liver volume.
• Received palliative therapy for a local lesion within 2 weeks prior to the first dose.
• Received systemic treatment with Chinese traditional medicines with anti-cancer indications or immunomodulators (including thymosins, interferons, and interleukins) within 2 weeks prior to the first dose of study treatment.
• Received systemic immunosuppressants within 2 weeks prior to randomization, excluding local use of glucocorticoids administered by nasal, inhaled, or other routes, and systemic glucocorticoids at physiological doses (no more than 10 mg/day of prednisone or equivalents), or glucocorticoids to prevent allergies to contrast media.