Abstract
The present paper reports at first case of bleeding from digestive tract caused supposedly by an extremely large polyp in the duodenal cap. The only probable sourse of bleeding was the large duodenal polyp and no other changes were detected on various examina-tions. The endoscopic appearance of the polyp was large pedunculated one with erosion-like hyperemic depression on the summit. Surgical polypectomy was carried out later on.The removed polyp was 6.1 cm in length.Histological examination of the polyp mostly showed the normal structure of the duodenal mucosa, Though the adenomatous or cystic changes were revealed in a part of the polyp. The histological picture of the polyp was therefore thought to be compatible to mixoma. On the surface of the specimen, there was an erosion similar to the ordinary one on the duodenal mucosa. Two other similar cases were also reported briefly in addition.
