CTICasesPosterior Mediastinal Lipoma
Imaging findings
Contrast-enhanced chest CT shows a well-defined, encapsulated fatty mass in the posterior mediastinum, located immediately posterior to the pericardium and esophagus. Unlike intrapericardial fat or lipomas, a distinct fat plane (pericardium) is clearly visible separating the mass from the cardiac chambers.
Key takeaways
Posterior mediastinal lipomas are rare, benign fatty tumors that must be differentiated from intrapericardial lipomas. Correctly identifying the intact pericardial line anterior to the mass is key to confirming its extrapericardial, posterior mediastinal location.
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