A large outpouching of the proximal esophagus above the upper esophageal sphincter is termed:

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A large outpouching of the proximal esophagus above the upper esophageal sphincter is called Zenker diverticulum. Barrett esophagus is a condition in which the lining of the esophagus changes to adapt to the constant exposure to stomach acid. Esophageal varices are enlarged veins in the lower part of the esophagus due to liver disease. Esophageal reflux is a condition where stomach acid backs up into the esophagus.

A Large Outpouching of the Proximal Esophagus Above the Upper