Efficacy and Safety of Apatinib for Recurrent or Metastatic Esophageal Squamous Cell Carcinoma

Apatinib is a small-molecule tyrosine kinase inhibitor (TKI) that highly selectively binds to and strongly inhibits vascular en-dothelial growth factor receptor 2 (VEGFR-2), with a decrease in VEGF-mediated endothelial cell migration, proliferation, and tumor microvascular density. Previous data showed that apatinib treatment significantly improved OS and PFS with an acceptable safety profile in patients with advanced gastric cancer refractory to two or more lines of prior chemotherapy. Our study will observe the efficacy and safety of Apatinib for recurrent or metastatic esophageal squamous cell carcinoma: A phase II, prospective, single-arm, multicenter trial.