The areas involved are prone to aneurysm formation.

There was no evidence of vasculitis, atheroesclerosis or aneurysm formation.

The wall of the artery has a normal architecture without signs of vasculitis, atherosclerosis or aneurysm formation.

The main stimulus for aneurysm formation is pressure atrophy of the structural support of the muscle layers.

In addition, there is a 17% to 25% incidence of new aneurysm formation.

Especially in the advanced stages when artery stenosis, occlusion, aneurysm formation occurs, and so forth.

Aortic dissection can lead to aneurysm formation.

Systemic necrotizing vasculitis and aneurysm formation affecting both medium and small arteries.

The most common complication is syphilitic aortitis, which may result in aneurysm formation.

Once torn these areas begin to fill with blood and become susceptible to aneurysm formation.