[The esophageal cyst--a rare congenital abnormality].

Esophageal cysts are among the embryonic malformations of the gastrointestinal tract. They develop from persisting diverticulum-like evaginations of the embryonic esophagus. The esophageal cyst is usually asymptomatic and is frequently diagnosed as an incidental finding. Since, however, a clear differentiation from malignancies is not possible with conventional diagnostic procedures. Surgical treatment is advisable in these cases.