Pericardial cysts are uncommon benign abnormalities and are most often foun
d in either cardiophrenic angle. We present the cases of 3 patients with a
cyst in the mediastinum and review the literature. Pathological examination
confirmed the diagnosis of pericardial cyst. Clinicians should include per
icardial cyst in the differential diagnosis of mediastinal masses. (C) 2001
by The Society of Thoracic Surgeons.