title: A case of lipomatous hypertrophy of the interatrial septum detected via transthoracic 2-dimensional echocardiography.
abstract: A 71-year-old woman underwent echocardiography for the evaluation of hypertensive heart disease. A 2-dimensional echocardiogram revealed an abnormal mass that protruded into the left atrium from the atrial septal side of the left atrial wall. Microscopic examination of the surgical specimen disclosed a mixture of normal-appearing fat, vesicular fat, and hypertrophied myocytes, and degenerated cardiac tissue with foci of necrotic fat tissue, consistent with lipomatous hypertrophy. Although lipomatous hypertrophy of the interatrial septum is rare, this little-known entity should be included in the differential consideration of the left atrial mass detected via echocardiographic examination, particularly in both obese and elderly patients.
authors.affiliation: Division of General Internal Medicine, Department of Internal Medicine, St. Marianna University School of Medicine, Asahi-ku, Yokohama-city, Kanagawa, Japan.
authors.forename: Sachihiko
authors.initials: S
authors.lastname: Nobuoka
authors.forename: Kenichi
authors.initials: K
authors.lastname: Saito
authors.forename: Fumihiko
authors.initials: F
authors.lastname: Miyake
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Abe
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Takakuwa
authors.forename: Toshio
authors.initials: T
authors.lastname: Nakamura
mesh_terms: D000368:Aged; D004452:Echocardiography; D005260:Female; D006338:Heart Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D006346:Heart Septum / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D006984:Hypertrophy; D008067:Lipoma / Q000000981:diagnostic imaging* / Q000601:surgery