Figure 1 Microvessel lined by endothelium in the outer media wall, ×1,350.
Figure 2 Small cavities (clefts) lined by normal or fragmented elastic fibers, ×550.
Figure 3 Pseudocyst lacking of endothelium, anfractuous, and lined by fragmented elastic fibers and smooth muscle cells with fibrous or fibrin bridges in its lumen, ×1,500.
Figure 4 Elastic fibers three-dimensional disarray, fragmentation, and diastases with clefts similar to the big ones in the convexity, ×1,500.
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