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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).
A Schatzki ring is a specific type of esophageal ring, and Schatzki rings are further subdivided into those above the esophagus / stomach junction (A rings), and those found at the squamocolumnar junction in the lower esophagus (B rings). Schatzki ring is usually diagnosed by esophagogastroduodenoscopy or barium swallow. Endoscopy usually shows a ring within the lumen of the esophagus which can be of variable size (see picture).