Barrett's esophagus (BE) is an abnormal change in the lining of the lower esophagus caused by stomach acid reflux injury. This is the biggest risk factor for esophageal cancer, although fewer than 1% of BE patients will develop cancer.

Barrett's esophagus (BE) is an abnormal change in the lining of the lower esophagus caused by stomach acid reflux injury. This is the biggest risk factor for esophageal cancer, although fewer than 1% of BE patients will develop cancer.