Pericardial cyst located in the anterior mediastinum mimicking a thymoma. A presentation of two cases.

Pericardial cysts are rare but well recognized tumors of the mediastinum. Most pericardial cysts are located in the right or left cardiophrenic angle. At other locations these cysts may pose a diagnostic problem. We present two cases of an atypically located pericardial cyst and a short review of the literature.