OUTLINE: This is a multicenter study. Patients are stratified by treatment (potentially curative vs purely palliative). Patients receiving potentially curative treatment are further stratified according to study treatment (esophagectomy alone vs esophagectomy plus adjuvant or neoadjuvant chemo/radiotherapy vs radical radiotherapy with or without chemotherapy). Patients receiving purely palliative treatment are further stratified according to study treatment (intubation/laser/ethanol injection vs palliative chemo/radiotherapy without endoscopic relief of dysphagia). Patients are administered two questionnaires: (1) The EORTC QLQ-C30 (version 3.0) is a 30-item questionnaire about patient ability to function, symptoms related to the cancer and its treatment, overall health and quality of life, and perceived financial impact of the cancer and its treatment. (2) The EORTC QLQ-OES-24 is a 24-item esophageal cancer-specific questionnaire supplementing EORTC QLQ-C30 with information about disease and treatment-related symptoms and side effects, dysphagia, nutrition, and social and emotional effects of esophageal cancer. Both questionnaires are administered once before and once during or after treatment.