Diagnosis and Management of Barrett’s Esophagus for the Endoscopist

In Barrett’s esophagus, the stratified squamous epithelium lining the esophagus is replaced by specialized intestinal-type columnar epithelium. The prevalence of Barrett’s esophagus has ranged from 0.9% to 4.5%. The rate of progression from Barrett’s esophagus to esophageal adenocarcinoma is 0.5% per patient-year.

http://www.medscape.com/viewarticle/735759