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A Schatzki ring or SchatzkiâGary ring is a narrowing of the lower esophagus that can cause difficulty swallowing (dysphagia).The narrowing is caused by a ring of mucosal tissue (which lines the esophagus) or muscular tissue. Schatzki ring or SchatzkiâGary ring is a narrowing of the lower esophagus that can cause difficulty swallowing (dysphagia).
The following are causes and risk factors of Schatzki's ring or esophageal ring: 1  Genetic defect from the birth. 2  Gastro Esophageal Reflux Disease (GERD) can lead to Schatzki ring or esophageal ring. The narrowing of esophagus is caused by the acid from the stomach entering the esophagus. 3  Hiatal hernias.