Figure 1:
A: Contrast-enhanced MPRAGE depicts single rim (white arrowhead) or double rim (white arrow) enhancement patterns.
B: Perifocal edema adjacent to the double rim enhancement in T2 weighted image (white star).
C: Enhancement of the outer wall layer correlates with vasa vasorum (black arrow) in H.E. staining.
D: Macrophage infiltration of all wall layers (black star) visualized with CD68 staining.
E: Neovascularisation of the wall/thrombus interface (black allowhead).
F: Macrophage invasion (black star) into the outer wall layer in single rim enhancement region (CD68).