Fig. 5.

Histological findings in group A and B listed in the left and right column respectively with the luminal side to the right. A–D: Verhoeff's Stain for elastic tissue enlarged ×100 and ×400. E–F: Immunoperoxidase staining for smooth muscle actin enlarged ×400. Notice the widespread resolution of the medial elastic lamellae and that the fibers in areas with residual elastic tissue are stretched and thinned. Smooth muscle cells are disorganized and appear atrophic especially towards the luminal side of the media.