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By Mayo Clinic staffBarrett's esophagus is a condition in which the color and composition of the cells lining your lower esophagus change, usually because of repeated exposure to stomach acid.
Barrett's esophagus is most often diagnosed in people who have long-term gastroesophageal reflux disease (GERD) — a chronic regurgitation of acid from the stomach into the lower esophagus. Only a small percentage of people with GERD will develop Barrett's esophagus.
A diagnosis of Barrett's esophagus can be concerning because it increases the risk of developing esophageal cancer. Although the risk of esophageal cancer is small, monitoring and treatment of Barrett's esophagus focuses on periodic exams to find precancerous esophagus cells. If precancerous cells are discovered, they can be treated to prevent esophageal cancer.
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