Typology of vascular involvement

Definition

Type 1

Involvement of the branches of the aortic arch

Type 2a

Involvement of the ascending aorta, aortic arch and its branches

Type 2b

Type 2a plus involvement of thoracic descending aorta

Type 3

Involvement of thoracic descending aorta, abdominal aorta and/or renal arteries

Type 4

Involvement of abdominal aorta and/or renal arteries

Type 5

IIb plus type IV