The Prevalence, Risk Factors and Optimal Biopsy Protocol of BE

This study looks at how common Barrett's esophagus — a condition where the lining of the food pipe changes due to long-term acid reflux — is in adults who have a type of cell change called columnar-lined esophagus. It also aims to find the best biopsy approach (tissue sampling method) to detect Barrett's esophagus during an endoscopy (a camera exam of the digestive tract). **You may be eligible if...** - You are an adult and have been found to have columnar-lined esophagus (a change in the cells lining the lower food pipe, detected during an endoscopy) **You may NOT be eligible if...** - You have previously had treatment for Barrett's esophagus - You have a history of upper digestive tract cancer - You have had your stomach fully or largely removed - You have esophageal varices (enlarged veins in the food pipe) - You have a bleeding disorder or are taking blood thinners Talk to your doctor to see if this trial is right for you.