What does lipomatous hypertrophy of the interatrial septum look like on imaging studies

What does lipomatous hypertrophy of the interatrial septum look like on imaging studies?

Lipomatous hypertrophy of the interatrial septum (LHIS) is characterized by benign fatty infiltration of the interatrial septum and is usually discovered incidentally. It most commonly occurs in older, obese people, with a higher incidence in women. On CT, LHIS appears as fat attenuation thickening of the interatrial septum with relative sparing of the fossa ovalis. On MRI, LHIS shows homogeneous high signal intensity similar to fat on all imaging sequences.

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