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Different masses arising from the digestive tract. a Oesophageal stenosis after Nissen fundoplication (arrow). b Posterior mediastinal mass (arrow) in relation with squamous-cell carcinoma of the oesophagus. c Oesophageal diverticulum (arrow) in a patient with oesophageal achalasia. Note the thickened oesophagus. d Hiatal hernia is a frequent incidental finding with or without air or air-fluid level (open arrow). * Pleural effusion
