Fig. 5

Microscopic findings of the normal part of the excised aortic root, showing normal elastic tissue in the tunica media; the reticulum fibers are normal, located very close to each other and in a regular paracell wavy pattern (black arrow), with intervening smooth muscle cells. The tunica media thickness is normal and uniform (large white eyebrow). Black small eyebrow shows normal intima. (Reticulum stain A*40, B*100, C*200, D*400)