Abstract
Patches of hererotopic gastric mucosa located in the upper esophagus are a frequent
finding at endoscopy. These lesions are thought to be of congenital origin and of
low malignant potential. However, several cases of adenocarcinoma developing on inlet
patches have recently been described. We report here a new case of adenoma that had
developed on heterotopic gastric mucosa in the upper esophagus, associated with an
area of highgrade dysplasia. This polyp was removed surgically under endoscopic guidance,
after confirmation of the superficial pattern of the lesion by endoscopic ultrasonography.
This report emphasizes the malignant potential of esophageal inlet patches of heterotopic
gastric mucosa.
