Figure 15. Congenital esophageal stenosis in a young man with long-standing dysphagia and occasional superimposed food impactions. Double-contrast esophagogram shows an area of mild narrowing in the midesophagus with distinctive ringlike indentations ("ringed esophagus") (arrows) in the region of the stricture. Endoscopic findings confirmed the presence of a mild stricture in the midesophagus with indentations that resembled tracheal rings.