Abstract
Congenital cysts of the esophagus are relatively rare. We report two cases of congenital cyst arisen in the esophageal wall, together with a review of previous 97 cases in Japan in terms of the histopathological classification. A 70-year-old man was admitted to the hospital because of tarry stool (Case 1). Chest roentgenogram revealed a tumor shadow in the right cardiophrenic angle. The cyst located in the esophageal muscle layer was removed. The cyst wall was lined with ciliated columnar epithelium, and had some cartilage and a well-developed smooth muscle layer. Another patient was a 46-year-old man who was admitted because of dysphagia and arrythmia (Case 2). The cystic was located in the same place as that of case 1. The removed cyst was lined with squamouse epithelium and had double layers of smooth muscle without cartilage. Based on Arbona's criteria, the cyst in case 1 was diagnosed as bronchogenic cyst, and the cyst in case 2 was diagnosed as duplication cyst.
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