A solution containing a dye (barium), which is visible on X-rays, has been swallowed (upper GI series) and X-rays have been taken of the esophagus. There is a narrowing near the stomach (indicated by the arrow). This non-cancerous ring of tissue (Shatzki's ring) may cause swallowing problems (dysphagia) and can be treated with dilation of the stricture.
George F. Longstreth, MD, Department of Gastroenterology, Kaiser Permanente Medical Care Program, San Diego, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.