Role of Endosonography in Diagnosis of Esophageal Bronchogenic Cyst: -Report of Two Cases.

Bronchogenic cyst is very difficult to diagnose preoperatively. We report two cases of bronchogenic cyst of the esophagus diagnosed and treated by thoracoscopic resection or endoscopic mucosal incision. Thoracoscopic resection was performed to diagnose and treat case 1, while in case 2, histological diagnosis was obtained with an endoscopic mucosal incision. On endoscopic ultrasonography, the lesion characteristically demonstrated two components consisting of an anechoic and homogeneous echoic pattern. Although it is very rare for bronchogenic cyst to be complicated by malignancy, histological diagnosis is necessary. If tumor localization is in the esophageal wall and the safety of a mucosal incision can be confirmed, endoscopic incision is a good alternative that allows less invasive diagnosis and treatment than surgery or thoracoscopy.