Lipomatous hypertrophy of the interatrial septum
Incidental finding on PET-CT scan
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FDG avid smooth, non-enhancing, well-marginated fat-containing lesion in the interatrial septum.
Lipomatous hypertrophy of the interatrial septum (LHIS) is a relatively uncommon disorder of the heart characterized by benign fatty infiltration of the interatrial septum. It is commonly found in elderly and obese patients as an asymptomatic incidentally discovered finding.