How to improve the efficacy of immunotherapy, evaluate the results of immunotherapy more objectively, and overcome immune resistance through reasonable combined treatment methods, so as to maximize the benefit of patients from immunotherapy, is an urgent research direction to be explored. Therefore, this study intends to observe and evaluate the efficacy and safety of camrelizumab combined with chemotherapy or anlotinib in patients with advanced esophageal squamous cell cancer previously Treated With First-line Immunotherapy . It can provide a basis for the treatment of esophageal cancer after immune resistance.
To observe and evaluate the efficacy and safety of camrelizumab combined with chemotherapy or anlotinib in patients with advanced esophageal squamous cell carcinoma previously Treated With First-line Immunotherapy