classification of abdominal and thoraco-abdominal aneurysms

Last reviewed 01/2018

Abdominal aortic aneurysms:

• infrarenal - below the renal arteries
• juxtarenal - abutting the renal arteries

Thorac-abdominal aneurysms can be classified according to the anatomic extent of the aneurysm (Crawford's classification):

• type I - involving most of the descending aorta, from the origin of the left subclavian to the suprarenal abdominal aorta

• type II - is the most extensive, extending from the subclavian to the aortoiliac bifurcation.

• type III- involves the distal thoracic aorta to the aortoiliac bifurcation.

• type IV - limited to the abdominal aorta below the diaphragm.

Reference:

• (1) Frederick JR, Woo YJ. Thoracoabdominal aortic aneurysm. Annals of Cardiothoracic Surgery. 2012;1(3):277-285.