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Classification of abdominal and thoraco-abdominal aneurysms

Authoring team

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:

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