Medically reviewed by: Jay W. Marks, MD
Many years ago, Schatzki described a smooth, benign, circumferential, and narrow ring of tissue in the lower end of the esophagus (the food pipe that connects the mouth to the stomach). These rings are located just above the junction of the esophagus with the stomach. These rings are very common, occurring in more than 6% of the population. The cause of these rings is not clearly understood, while some doctors believe they are caused by long term damage from stomach acid reflux.
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