Esophageal cancer is one of the most common malignant tumor and esophageal squamous cell carcinoma is the main pathological type of esophageal carcinoma in China. Among patients with advanced or metastatic esophageal squamous cell carcinoma, the addition of immunotherapy to chemotherapy, compared with placebo and chemotherapy, significantly improved overall survival and progression-free survival.Treatment of recurrent or metastatic esophageal squamous cell carcinoma is usually poor. New treatments were needed. Fruquintinib is an orally antiangiogenic agents, which target VEGFR1/2/3. A combination of Fruquintinib and s-1 for advanced or metastatic esophageal squamous cell carcinoma could be a novel therapy. Therefore, investigators initialize this phase II study to explore the safety of fruquintinib and S-1 combination treatment in ESCC patients with after failure in 1st-line immunotherapy.
Investigators conduct the clinical trial to further explore the efficacy and safety of Fruquintinib combined with S-1 in treating recurrent or metastatic esophageal squamous cell carcinoma after the failure of conventional treatments.