Barrett esophagus affects approximately 5% of people in the US and approximately 1% worldwide; it's associated with an increased risk of esophageal adenocarcinoma. JAMA Deputy Editor Mary M. McDermott, MD, interviews Prateek Sharma, MD, a gastroenterologist and professor of medicine at University of Kansas School of Medicine, about the diagnosis, surveillance, and available therapy for patients affected by Barrett esophagus. Related Article(s): Barrett Esophagus