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.

Inclusion Criteria:

• Histologically confirmed squamous cell carcinoma, adenocarcinoma of the esophageal or esophagogastric junction Unresectable or potentially resectable tumor (cT3-4N0-1M0-M1b, without visceral metastasis, according to AJCC 6th) based on standard primary staging by EUS and CT
• Age>18 years
• No distant metastasis other than supraclavicular lymph nodes
• No prior history of thoracic radiation
• Patients must have normal organ and marrow function as defined below: Leukocytes: greater than or equal to 3,500 G/L; Platelets: greater than or equal to 100,000/mm3 .Hemoglobin:greater than or equal to 10g/L .Total bilirubin: within normal institutional limits; AST/ALT: less than or equal to 1.5 times the upper limit; Creatinine within normal upper limits

Exclusion Criteria:

• Patients with other cancer history except cervical carcinoma in situ and non-malignant melanoma skin cancer during 5 years before diagnosis of esophageal cancer
• Pregnant or lactating females
• Contraindication for radiotherapy or chemotherapy

Patients with esophageal or esophagogastric junction cancer