 Abstract definitive chemotherapy, DCRT, is used in patients with esophageal squamous cell carcinoma, yes CC, who have either CT4 disease without distant metastasis or C-stage 1-3 who cannot undergo surgery. The rate of clinical complete response, CCR, varies depending on the stage, and patients who achieve CCR often experience tumor recurrence. For those with residual tumor or with recurrence, salvage treatment is performed to achieve a cure. Several procedures have been reported as salvage treatments, including esophagectomy, pulmonary complication related pulmonary complications, lymph adenectomy, metastasectomy, endoscopic resection, photodynamic therapy, DCRT, and rearadiation. Each procedure has its own advantages and disadvantages, and none have been shown to significantly improve overall survival, OS.