抄録
A 40-years-old male was pointed out a duodenal polyp by the screening esophagogastroduodenoscopy (EGD) . and he was introduced to another hospital. Because the pedunculated polyp had a stalk and was covered by the normal mucosa1.5 cm in diameter, he was introduced for endoscopic mucosal resection EMR) to ourhospital. EGD showed mushroom-like pedunculated polyps with small depressed lesions 20 mm in diameter in the duodenal anterior wall. Endoscopic ultrasonography showed an echogenic lesion with small anechoic lesions in the second and third layer. We performed EMR for this leison. Pathologic findings showed hyperplasia of the Brunner’s glands without atypical cells in the lamina propria mucosae and submucosal layer covered by the epithelium with intestinal metaplasia. He was diagnosed of Brunner’s glands hyperplasia. We herein reported the rare case of Brunner’s glands hyperplasia with mushroom-like form in the duodenum.
