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A. Disruption of the smooth muscle in the media (arrowheads) with associated mucoid intimal changes. (H&E, 400×).
B. Mucous staining reveals mucosal degeneration in the intima (*) and between the media and adventitia (arrowhead) (alcian blue staining, 400×). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
