Lipomatous hypertrophy of the interatrial septum

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[edit] Discussion of Lipomatous hypertrophy of the interatrial septum

  • Lipomatous hypertrophy of the interatrial septum (LHIS) is a benign condition characterized by fat accumulation in the interatrial septum.
  • LHIS is unencapsulated mass that can contain adipocytes, myocytes, and mild interstitial fibrosis.
  • LHIS is a result of adipose cell hyperplasia
  • LHIS is linked to increasing patient age and obesity.
  • LHIS is often asymptomatic but is associated with atrial arrhythmias, altered P-wave configurations, recurrent pericardial effusions, and sudden cardiac death.

[edit] Imaging Findings for Lipomatous hypertrophy of the interatrial septum

  • Diagnosis is made with CT when a smooth, nonenhancing, well-marginated fat-containing lesion in the interatrial septum is identified.
  • Lesion characteristically takes on a dumbbell shape, with relative sparing of the oval fossa.

[edit] Images

Patient #1

[edit] External Links

[edit] References for Lipomatous hypertrophy of the interatrial septum