Barrett's esophagus

n. condition caused by stomach acid reflux in which ulcers form in the lower esophagus and the epithelial cells are replaced with abnormal cells similar to those lining the stomach (Gastroenterology)

Barrett's esophagus (sometimes called Barrett's syndrome, CELLO, columnar epithelium lined lower (o)esophagus or colloquially as Barrett's) refers to an abnormal change (metaplasia) in the cells of the lower end of the esophagus thought to be caused by damage from chronic acid exposure, or reflux esophagitis. Barrett's esophagus is found in about 10% of patients who seek medical care for heartburn (gastroesophageal reflux). It is considered to be a premalignant condition and is associated with an increased risk of esophageal cancer.
See more at Wikipedia.org...

A change in the cells of the tissue that lines the bottom of the esophagus. The esophagus may become irritated when the contents of the stomach back up (reflux). Reflux that happens often over a period of time can lead to Barrett's esophagus. Barrett’s esophagus is a risk factor in esophageal cancer.

A condition in which the cells lining the lower part of the esophagus have changed or been replaced with abnormal cells that could lead to cancer of the esophagus. The backing up of stomach contents (reflux) may irritate the esophagus and, over time, cause Barrett's esophagus.