Gastric foveolar adenoma in the duodenal bulb: case report

Abstract

Foveolar-type adenomas are very rare lesions, representing approximately 2.7% of duodenal adenomas with gastric phenotype, histologically characterized by tall columnar cells resembling gastric foveolar epithelium and a tubulovillous structure with various degrees of dysplasia. Their risk of progression to adenocarcinoma is related to the size of the polyp and the presence of high-grade dysplasia. The recommended therapeutic approach is the endoscopic resection. our clinical case reports a rare case of a patient in whom gastric foveolar adenoma was incidentally discovered as an 8 mm sessile polyp in the duodenal bulb resected entirely by en-bloc mucosectomy technique. Through this case, we draw attention to the existence of bulbar adenomas, which carry a risk of dysplasia and progression to adenocarcinoma.