Both dilation and cystic medial necrosis weaken the aorta, making it susceptible to aneurysm, dissection, and rupture.

不管是扩张或是囊性中层坏死，这些病变都会使主动脉变得脆弱，更容易形成动脉瘤、夹层以及破裂。

The aorta also undergoes cystic medial necrosis, which is where there is degeneration of the tunica media, which is the central portion of the aortic wall.

除此之外，主动脉还会有囊性中层坏死，即主动脉的中膜发生退行性变；中膜是主动脉壁的中心部分。