CTICasesPosterior Pericardial Cyst
Imaging findings
Chest CT shows a large, well-circumscribed, water-attenuation (0 HU) cystic structure in the posterior basal left hemithorax, displacing the esophagus to the right. Pathological resection confirmed a mesothelial-lined coelomic/pericardial cyst.
Key takeaways
Pericardial/coelomic cysts are benign, mesothelial-lined structures of embryological origin. Although most commonly found in the anterior cardiophrenic angles, they can rarely present in atypical locations such as the posterior mediastinum.
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