Changes of diffuse and extensive aortitis involve both the suprarenal and infrarenal aorta.
An inflammatory soft tissue mass surrounds the aorta , resulting in mural irregularity, luminal narrowing and narrowing and occlusion of major visceral branches
Both renal arteries are involved at their origin, distally they both appear normal
The coeliac axis is occluded, its branches are fed via the superior mesenteric artery, this artery is narrowed at its origin.
The aortic bifurcation is patent with patent run-off to both lower limbs