Sintilimab After Concurrent Chemoradiotherapy in Elderly Patients With Esophageal Squamous Cell Carcinoma

Patients should receive their first dose of sintilimab within 42 days after completing the final radiotherapy session and continue treatment until disease progression, occurrence of intolerable toxicity, loss to follow-up, death, or as determined by the investigator, whichever comes first. The maximum duration of sintilimab treatment is 12 months (from the initiation of therapy). No other anti-tumor therapies are permitted during the treatment period.