CTICasesPapillary Fibroelastoma
Imaging findings
CT and MRI demonstrate a small, highly mobile, lobulated cardiac mass attached to the chordae tendineae of the mitral valve. On CT, the lesion is closely adjacent to the papillary muscles and can easily be overlooked. Histological examination reveals a classic branching pattern of avascular collagenous and elastic fronds lined by a single layer of endothelial cells.
Key takeaways
Papillary fibroelastoma is the most common primary benign tumor of the cardiac valves. Though histologically benign, these lesions are highly mobile and harbor a high risk of thromboembolic events, commonly presenting as strokes or myocardial infarctions due to tumor fragmentation or thrombus formation on the branching endothelial fronds.
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