Carcinoma in an oesophageal diverticulum.

A young male who had minimal dysphagia since childhood complained of increasing difficulty in swallowing for a few months. Upper Gastrointestinal endoscopy was normal on two occasions done by two gastroenterologists. Barium swallow showed minimal extrinsic pressure on the oesophageal wall. X-ray chest was normal. CT scan showed a large growth close to the oesophagus. Resection of the growth showed a carcinoma completely filling an oesophageal diverticulum with a normal oesophageal lumen.