CTICasesLeft Atrial Myxoma
Imaging findings
Chest CT and echocardiography reveal a large, lobulated, low-attenuation mass attached to the interatrial septum that prolapses through the mitral valve during diastole. This is associated with dilated pulmonary veins, pulmonary artery enlargement, and mild interstitial edema.
Key takeaways
Left atrial myxomas are the most common primary cardiac tumors. By prolapsing through the mitral valve, they can mimic mitral stenosis, leading to pulmonary venous congestion, interstitial edema, and secondary post-capillary pulmonary hypertension.
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