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Barrett¡¯s esophagus (also sometimes called Barrett¡¯s disease or Barrett¡¯s syndrome) is a precancerous condition caused by uncontrolled acid reflux or gastroesophageal reflux disease (GERD).

It happens when corrosive stomach acid seeps back up into your esophagus due to a faulty ring of muscle called a sphincter between the two organs. This causes chronic inflammation that triggers intestinal metaplasia, a process in which the normal...