Isolated Iliac artery aneurysm (classification)
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Classification of isolated iliac artery aneurysms (IIAA)
The IIAs are classified according to their anatomy, describing the proximal non anuerysmal artery (proximal neck or landing zone) and distal non aneurysmal artery (distal landing zone). This classification allows selection of appropriate candidates for endovascular or surgical therapy.
TypeA: The CIA aneurysm proximally involves or extends within 1.5 cm of the aortic bifurcation. Distally it extends to or beyond the internal iliac artery.
Type B: The CIA aneurysm has an adequate proximal neck (i.e. ≥1.5cm of non aneurysmal artery). There is however, no distal landing zone.
Type C: The CIA has an adequate proximal neck as well as a distal landing zone.
Type D: A solitary internal iliac aneurysm which spares the internal iliac artery origin.
Type E: The CIA aneurysm extends into the internal iliac artery.