Influence Mechanism of Tumor Microenvironment Changes on Neoadjuvant Therapy for Esophageal Squamous Cell Carcinoma

To evaluate the predictive value and mechanism of inflammatory factors in peripheral blood on the prognosis of patients, and to explore the influencing factors of inflammation and tumor microenvironment on the efficacy of neoadjuvant chemotherapy combined with immunotherapy for esophageal cancer. To explore the predictors of neoadjuvant therapy in patients with esophageal squamous cell carcinoma.