Figure legends
Figure 1: Computed tomography and its schema showing the 63-mm ascending aorta near the proximal anastomosis site. Arrows indicate an ascending aortic aneurysm compressing the right atrium.
Figure 2: Histological findings of the aneurysmal wall with severe atherosclerotic changes. (a) Hematoxylin and Eosin (H&E) staining highlights that the wall was composed of tunica intima (*), media (**), and externa (***). The tunica intima thickened with the formation of atheroma. (b) Masson-Goldner stain indicated the decrease of smooth muscle (red stained fibers) and the disordered arrangements of elastic fibers (brown to dark stained fibers). Some elastic fibers ruptured, and fragmented fibers were observed (white arrow).