CTICasesInferior Vena Cava Lipoma
Imaging findings
Chest CT shows a well-defined mass of fat attenuation (-80 Hounsfield units) arising from the wall of the inferior vena cava and protruding into the right atrium. Cardiac MRI confirms the mass is composed entirely of fat, with complete signal suppression on fat-saturated sequences and no enhancement after gadolinium administration.
Key takeaways
Intracardiac lipomas are benign tumors composed of mature adipose tissue. They can arise from the subendocardium, myocardium, or pericardium, and occasionally arise from the wall of the inferior vena cava and project into the right atrium. They are characterized by homogeneous fat attenuation on CT and signal suppression on fat-sat MRI sequences, distinguishing them from other cardiac masses like myxomas or lipomatous hypertrophy of the interatrial septum.
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