Eligibility
Locoregional recurrent disease
OESOPHAGEAL SQUAMOUS CELL CARCINOMA, METASTASES
Patients who underwent a radical transthoracic resection with negative margins within 3 months and histologically confirmed esophageal squamous cell carcinoma (pT3-4NxM0 or pTxN + M0 according to AJCC 7th edition) were eligible for this study. No preoperative radiation therapy or chemotherapy was allowed. Locoregional recurrent disease or distant metastases before enrollment should be excluded. Other eligible criteria were as follows, age ≤ 75 years, Karnofsky Performance Status Score ≥ 80, neutrophil count ≥ 1.5 × 10