Endoscopic papillectomy for a Duodenal Duplication Cyst

A 39-year-old woman presented with a history of recurrent abdominal pain. She had been hospitalized for mild pancreatitis 3 years ago. Her vital signs were stable, and other tests were normal. Radiography showed a well-defined spherical duodenal mass measuring 3.2 cm × 5.0 cm (Figure 1 [A], white arrows). On endoscopy, the lesion appeared as a submucosal mass immediately anterior to the duodenal papilla (Figure 1 [B]). Endoscopic ultrasonography (US) revealed a double-layered wall, and an inner echogenic and outer hypoechoic layer (Figure 1 [C]). A characteristic finding was the double-wall sign1 for duodenal duplication cyst (DDC) (Figure 1 [C]). This article is protected by copyright. All rights reserved.