Cadonilimab/Anlotinib in Locally Advanced or Relapsed/Metastatic ESCC Patients After Failure of PD-1 Combined With Platinum-containing Chemotherapy

Advanced esophageal squamous cell carcinoma patients who have failed first-line PD-1 inhibitor combined with chemotherapy lack a standard treatment option. Second-line treatments have limited efficacy, indicating a significant unmet clinical need. Anlotinib is a novel multi-target tyrosine kinase inhibitor (TKI) has anti-tumor angiogenesis and tumor growth inhibition effects. Cadonilimab is a human immunoglobulin (Ig) G1 monoclonal antibody (mAb), which is a bispecific antibody that blocks both PD-1 and CTLA-4. Both of them have shown certain efficacy and good safety in more than second-line therapy for patients with advanced esophageal squamous cell carcinoma as monotherapy. This study aims to evaluate the efficacy and safety of cadonilimab combined with anlotinib in patients with locally advanced or recurrent/metastatic esophageal squamous cell carcinoma who have progressed on PD-1 inhibitor combined with platinum-containing chemotherapy.