CTICasesLeft Atrial Myxoma
Imaging findings
Frontal and lateral chest radiographs demonstrate a rounded, densely calcified mass located in the retrocardiac region. Chest CT confirms a well-defined left atrial mass arising from the fossa ovalis of the interatrial septum, containing extensive, dense calcification, characteristic of a left atrial myxoma.
Key takeaways
Myxomas are the most common primary cardiac tumors, with the vast majority (75-80%) located in the left atrium, typically attached to the fossa ovalis of the interatrial septum. While they are usually soft and gelatinous, they can undergo degeneration, hemorrhage, and dystrophic calcification. Extensive calcification can make them visible on chest radiographs and help differentiate them from other cardiac masses or thrombi.
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