Barrett's esophagus is a condition in which there is a change in the morphology of the esophageal mucosa due to chronic gastroesophageal reflux. In cases of dysplasia, we can intervene endoscopically. Endoscopic treatment includes removal of the part of the mucosa that is dysplastic (Endoscopic Mucosal Resection-EMR) or radiofrequency ablation of Barrett's esophagus (RFA). They are painless procedures performed in the hospital under anesthesia.