CTICasesThymolipoma
Imaging findings
Chest radiograph shows apparent cardiomegaly. CT chest reveals that the cardiomegaly is simulated by a large, soft, anterior mediastinal mass composed primarily of mature fat with interspersed strands of soft tissue, draping over the heart without invading adjacent structures, representing a thymolipoma.
Key takeaways
Thymolipomas are rare, slow-growing, benign anterior mediastinal tumors composed of mature adipose and thymic tissue. Because they are soft, they mold to surrounding structures (such as the heart and diaphragm) and can simulate cardiomegaly, pericardial effusion, or diaphragmatic elevation on chest radiographs.
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