研究单位：[1]Department of Radiation Oncology, Cancer Hospital, National Cancer Center, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College (PUMC),Beijing,China,100021[2]Hebei Medical University Fourth Hospital[3]Fujian Cancer Hospital[4]Anyang Tumor Hospital[5]The First Affiliated Hospital with Nanjing Medical University[6]Affiliated Hospital of Hebei University[7]Tianjin Medical University Cancer Institute and Hospital[8]Beijing Hospital[9]Tengzhou Central People's Hospital[10]PLA Army General Hospital
研究目的：
The aim of this observational study is to retrospectively collect survival data for 3000 primary esophageal cancer patients from multicenter between January 2000 to present. Based on a Cox model, we want to develope a nomogram that predicts local recurrence, distant metastases, and survival for patients treated with radiotherapy or chemoradiotherapy with or without chemotherapy.
