Left atrial appendage aneurysm: A case report

Figure 3 Hematoxylin and eosin staining of the resected left atrial appendage aneurysm. A: The wall of the aneurysm is thin, with slight fibrosis of the endo- and epicardium (scale bar 100 µm, 100 × magnification); B: Hypertrophied cardiomyocytes with dystrophic changes and vacuolated cytoplasm (scale bar 100 µm, 400 × magnification).