Abstract
The patient was a 19-year old female. She visited our hospital with a chief complaint of vomiting. Upper gastrointestinal barium examination and endoscopic examination revealed circumferential stenosis in the descending portion of the duodenum. Congenital duodenal diaphragm in an adult female was diagnosed by these findings, in addition to abdominal echography and abdominal CT. She refused to under go surgical operation due to cosmetic reasons. Although it was still considered that surgical treatment was indicated in this case, endoscopic incision of congenital duodenal diaphragm was performed. After the procedure, there were no complications, and her symptoms disappeared. The incised portion still remains opened and, she is well now.
