A Case Report: Lipomatous Hypertrophy of the Interatrial Septum

Lipomatous hypertrophy of the interatrial septum is a benign condition characterized by the deposition of fat into the interatrial septum. It is often mistaken for atrial masses and can be associated with conditions such as obesity, and steroid use. In this case presentation, we describe the computed tomography (CT) findings of an incidentally detected and asymptomatic case of lipomatous hypertrophy of the interatrial septum in an 81-year-old male patient with a history of nephrolithiasis. The patient under-went CT imaging, revealing a nodular thickening of the interatrial septum. Despite the presence of moderate cardiomegaly, the patient did not exhibit any symptoms related to the cardiac mass. Lipomatous hypertrophy of the interatrial septum is often asymptomatic but can rarely cause cardiac symptoms and arrhythmias. Differential diagnoses include other cardiac masses. Accurate diagnosis is cru-cial to avoid unnecessary surgery and to provide appropriate management. Diagnostic assessment involves multiple imaging modalities, such as echocardiography, cardiac CT, and magnetic resonance imaging (MRI) scans, with CT and MRI being particularly useful in characterizing the tissue properties. The recognition and understanding of lipomatous hypertrophy of the interatrial septum are important for radiologists to ensure accurate diagnosis and appropriate patient management.