Left Atrial Myxoma
Imaging findings
Echocardiogram and cardiac MRI show a well-defined, mobile lobulated mass attached to the fossa ovalis of the interatrial septum, demonstrating T2 hyperintensity and heterogeneous enhancement, representing a left atrial myxoma.
Key takeaways
Myxomas are the most common primary cardiac neoplasms, typically arising from the interatrial septum in the left atrium. On MRI, they are characteristically hyperintense on T2-weighted images due to high myxoid content, and carry a high risk of mitral valve obstruction or systemic embolization.
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