Nimotuzumab Concurrent With Chemoradiotherapy for Patients With Unresectable Esophageal Squamous Cell Carcinoma

Inclusion Criteria: * Histologically confirmed esophageal squamous cell carcinoma. Tumor response was evaluated as stable or locoregionally progresive disease or assessed by surgeons being unresectable (without distant metastasis) after induction chemo(immuno)therapy. * Cycles of induction chemo(immuno)therapy was 2-4. * KPS score ≥70. * Main organs and bone marrow function are normal: routine blood tests: hemoglobin (Hb) ≥100g/L ; absolute neutrophil count (NEUT)≥1.5×109/L; platelets (PLT) ≥100×109/L; white blood cell (WBC)≥3.5×109/L,biochemical examination: alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤1.5×UNL; serum total bilirubin (TBIL) ≤1.5×UNL; serum creatinine ( Cr) 1.0×1.5UNL, and BUN≤1.0×UNL; Exclusion Criteria: * Those combined with other primary malignant tumors other than esophageal cancer (except cured basal cell carcinoma of the skin and carcinoma in situ of the cervix); * At the time of diagnosis, there were distant and hematogenous metastases beyond the supraclavicular lymph node region, including retroperitoneal multiple lymph node metastasis, bone metastasis, brain metastasis, lung metastasis, liver metastasis, malignant pleural effusion and ascites * There are active infections, such as active tuberculosis and hepatitis * There are contraindications to targeted therapy.