Figure 2 :(a) Overhanging intima at the site of tear (*: Luminal aspect, m: Media, a: Adventitia, 50); (b) Wall of the saccule composed of loose fibrocellular tissue with part of the outer third of the media (*luminal aspect, 250): (c) The media, proximal and distal to the tear, showed extensive loss of smooth muscle cells and elastic fi bers with associated collagenization (*luminal aspect, 250). All slides stained by Elastic van Geison