ESCC	esophageal squamous cell carcinoma
CROSS	Chemoradiotherapy for Oesophageal Cancer Followed by Surgery Study
AJCC	American Joint Committee on Cancer
CT	computed tomography
PET	positron emission tomography
EUS	endoscopic ultrasound
TNM	tumor node metastasis stage
CRT	conformal radiotherapy
IMRT	intensity-modulated radiotherapy
GTV	gross target volume
CTV	clinical target volume
PTV	planning target volume
OS	overall survival
DFS	disease-free survival
SPSS	Statistical Package for the Social Sciences