Endoscopic submucosal tunnel dissection of a bronchogenic esophageal cyst

A 23-year-old man was admitted to our hospital with the complaint of chest discomfort and dyspnea for the previous 3 months. Upper endoscopy showed a 2.5 × 2.0 cm bulging lesion in the distal esophagus ([Fig. 1]). Endoscopic ultrasound revealed a 1.1 × 2.5 cm hypoechoic cystic lesion arising from the muscularis propria ([Fig. 2]). Endoscopic submucosal tunnel dissection (ESTD) was performed using a hybrid knife (ERBE, Tübingen, Germany), and a cystic mass was observed between the mucosa and the muscular layers of the esophagus. On locating the cyst, its yellowish milky fluid content was aspirated. The cyst wall was excised using endoscopic argon plasma coagulation ([Fig. 3]). Histopathological examination showed a cuboidal epithelium lined cyst wall, which contained cartilage and a few bronchial glands, consistent with a bronchogenic cyst ([Fig. 4]). The patient remained asymptomatic during follow-up.