Korean J Pathol.  2007 Jun;41(3):213-215.

Lipomatous Hypertrophy of the Interatrial Septum: A Case Report

• Kwak JE
• Kim HS
• Joo M
• Chang SH
• Shim SH
• Chi JG
• Kim WS

Abstract

Lipomatous hypertrophy of the interatrial septum is a benign cardiac mass that is characterized by excessive deposition of fat in the interatrial septum. It typically occurs in elderly, obese patients and may cause arrhythmia. We report a case of lipomatous hypertrophy of the interatrial septum. A 45-year-old man was admitted for evaluation of chest discomfort. Transthoracic echocardiography revealed a cardiac mass, which was suspected as a myxoma. A resection of the tumor was performed. Grossly, the mass was 1.3x1.2x0.8 cm, and showed yellow soft consistency and good demarcation. Microscopically, the mass consisted of mature adipose tissue, intermixed cardiac muscle fibers, entrapped nerve fibers and ganglion cells. Lipomatous hypertrophy of the interatrial septum should be differentiated pathologically from tumorous cardiac mass such as lipoma and myxoma.

Keyword

Heart septum; Hypertrophy; Lipoma

MeSH Terms

Adipose Tissue
Aged
Arrhythmias, Cardiac
Echocardiography
Ganglion Cysts
Heart Septum
Humans
Hypertrophy*
Lipoma
Middle Aged
Myocardium
Myxoma
Nerve Fibers
Thorax