Achalasia of the cardia.
A 47-year-old male patient presented with difficulty in swallowing for approximately 2 years. (a) The barium swallow shows marked dilatation of the esophagus, which on fluoroscopy shows virtually no peristalsis and a failure of the distal end of the esophagus to relax, except infrequently and incompletely. (b) The chest X-ray 45min after the barium swallow shows a persistent residue of barium in the esophagus (arrows). No gas is visible in the fundus of the stomach.
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