2.2.2 Equipements - Gastro-esophageal endoscope (Olympus, Japan) 9 - CT RT 580 (GE, USA) - PET / CT (GE, USA) - Varian CX accelerator (USA) - PET / CT image processing on PET VCAR software (GE, USA) - IMRT planning on Eclipse 13.0 (Varian, USA) 2.2.3 Procedure - Physical examination and endoscopy with biopsy - Chest-abdominal CT scan for initial staging according to the Ministry of Health guidelines (2013).