[Esophageal duplication cyst resected with video-assisted thorasic surgery; report of a case].

Duplication of the alimentary tract is a developmental anomaly, which may affect any part of the digestive tract from the mouth to the anus. Esophageal duplication cyst is caused by an incomplete differentiation of the foregut. We report a case of esophageal duplication cyst resected using video-assisted thoracic surgery (VATS). Chest radiography of a 23-year-old woman showed an abnormal shadow. Chest computed tomography (CT) indicated a cystic lesion adjacent to the descending aorta and the esophagus. Magnetic resonance imaging (MRI) showed that the cystic lesion was filled with protein-rich fluid. The lesion was resected using VATS, and it was pathologically diagnosed to be an esophageal duplication cyst.