Congenital diaphragm of the duodenum in an adult: a case report.

Chronic duodenal obstruction related to a congenital mucosal diaphragm is a rare anomaly that is difficult to diagnose preoperatively. The authors report the case of a 22-year-old woman with this anomaly. Diagnosis was not established until a second surgical exploration, when the web was found and excised through an anterior duodenotomy. The patient had a gastric atony for 3 weeks after the operation. It was successfully corrected by administering oxytocin.