Pericardial Cyst

A pericardial cyst is a fluid-filled cyst of the parietal pericardium. They are usually located at the cardiophrenic angle on the right. Sometimes they are located higher up and extend into the major fissure, and very rarely they occur in the mediastinum. Pericardial cysts are usually asymptomatic but can cause atypical chest pain.

Case #1a. Pericardial cyst on right: a sharply marginated, oval mass that rarely calcifies.

 



Case #1b. Lateral view of right pericardial cyst. 

 



Case #1c. CT correlation of right pericardial cyst. Attenuation values are typically 20-40 HU.