FIGURE LEGENDS
FIGURE 1
Macroscopic findings. A. Intraoperative findings showing black pigmentation in the aortic lumen and aortic valve leaflet. B. Black pigmentation extending to the left ventricular outflow tract and anterior leaflet of the mitral valve (arrow) after aortic valve leaflet excision. C. Resected aortic valve leaflets. The leaflets have black patches with calcification, but the edges of the cusps are relatively free from degenerative changes.
FIGURE 2
Histopathological examination of the excised aortic valve leaflets showing dark-brown pigment deposition in the valve cusps, associated with calcium nodules.