Abstract
42 cases of double pylorus, including our case, have been reported in Japan. Recently we experienced a case of congenital double pylorus. A 79-year-old male visited our clinic with a chief complaint of epigastric discomfort. Since X-ray examination of the upper gastrointestinal tract revealed a polypoid mass in the duodenal bulb, endoscopy was subsequently performed. Endoscopically, "double pylorus", the condition in which the pyloric ring has been divided into two portions by a band extending from the anterior wall to the posterior wall, found. Since this patient had no past history of peptic ulcer and historogical findings of biopsy specimens from the band showed no ulcerative changes and inflammatory fibrosis, it was considered to be a case of congenital double pylorus.
