Barrett’s esophagus is a condition in which the tissue lining the esophagus – the tube that passes the food from the mouth to the stomach – is replaced by tissue similar to that of the intestinal lining. This occurs chiefly in the cells of the epithelial tissue which lines the lower end of the esophagus.
https://www.news-medical.net/health/Barretts-Esophagus-with-Dysplasia.aspx
Barrett's Esophagus with Dysplasia