UW Emergency Radiology

Crawford Classification of Thoraco-abdominal Aneurysms


Classification Description Notes
Type 1 From the origin of the left subclavian to the suprarenal abdominal aorta
Type 2 From the subclavian to the aortoiliac bifurcation
Type 3 Distal thoracic aorta to the aortoiliac bifurcation
Type 4 Limited to the abdominal aorta below the diaphragm



Crawford, E. S. and J. S. Coselli (1991). “Thoracoabdominal aneurysm surgery.” Semin Thorac Cardiovasc Surg 3(4): 300-322.