Arteriolosclerosis with asymmetrical fibrous intimal thickening (fibrous endarteritis) and Mönckeberg medial calcinosis (calcification of the internal elastic lamina and media): A, Hematoxylin-eosin-saffron (HES)–stained (original magnification ×400); B, von Kossa–stained (original magnification ×400); C, Field-emission–scanning electron microscopy (FE-SEM). Calcific uremic arteriolopathy (CUA) hypodermic arterioles with voluminous and circumferential parietal calcium deposits: D, HES-stained (original magnification ×400); E, von Kossa–stained (original magnification ×400); F, FE-SEM.