CTICasesPapillary Fibroelastoma
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Imaging findings
CT revealed a large lesion (2.4 cm) in the left atrium, attached to the roof near the left atrial appendage and left superior/inferior pulmonary veins. It had a relatively low mean attenuation, measured in the negative 40-50 Hounsfield units, initially suggesting a lipoma.
Key takeaways
Papillary fibroelastomas, though typically found on valves, can occur on any endocardial surface. This case was atypical due to its massive size (most are <1cm) and its unusual low attenuation on CT, which puzzled the presenter and pathologist despite classic pathological findings.
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