Lipomatous Hypertrophy of the Atrial Septum in a Patient Undergoing Coronary Artery Bypass Surgery

Figure 1

(a) Gross feature of LHIS showed diffuse thickening of the interatrial septum with yellow cut surface. (b) Histological overview showed extensive fat entrapping cardiomyocytes. (c) High power shows mature adipocytes and residual muscle forming septa. (d) High power of myocytes shows enlarged bizarre nuclei mimicking liposarcoma.

(a)

(b)

(c)

(d)