研究单位：[1]Tianjin Cancer Hospital,Tianjin,Tianjin,China,300060[2]Sichuan Cancer Hospital and Research Institute[3]Henan Cancer Hospital[4]Shanxi Province Cancer Hospital[5]Hunan Cancer Hospital[6]Henan Cancer Hospital,Zhengzhou,Henan,China[7]Hunan Cancer Hospital,Changsha,Hunan,China[8]Shanxi Cancer Hospital,Taiyuan,Shanxi,China[9]Sichuan Cancer Hospital,Chengdu,Sichuan,China
研究目的：
This study is a multi-center, non-interventional study. Clinicopathologic, treatment , outcome and efficacy data will be collected from medical records in metastatic esophageal squamous cell carcinoma (ESCC) patients.
