RESUMEN
Duodenal Brunner's gland adenoma is characterized by hyperplasia of the Brunner's gland, which is usually found in a duodenal bulb as a pedunculated polypoid mass. Conservative management is advocated for asymptomatic small lesions, but in larger lesions causing obstructive symptoms or bleeding, either endoscopic or surgical removal of the mass should be performed. But an endoscopic polypectomy for a huge mass lesion, especially one having a broad base, runs the risk of bleeding, so to minimize this complication, detachable snare is used before the polypectomy. We have experienced a case of huge duodenal Brunner's gland adenoma was successfully removed by an endoscopic polypectomy with a detachable snare, in a patient with recurrent upper gastrointestinal bleeding.