An internal iliac artery aneurysm represents a focal dilation of the internal iliac artery, the primary vessel supplying the pelvis and its numerous vital structures. Notably, these aneurysms are frequently associated with other vascular pathologies; a patient presenting with an internal iliac artery aneurysm should be thoroughly evaluated for concomitant aneurysms in the abdominal aorta or contralateral iliac vessels to ensure a comprehensive vascular assessment.
Internal Iliac Artery Aneurysm: Understanding Anatomy and Pathophysiology
Risk Factors and Associated Conditions Several factors contribute to the development of an internal iliac artery aneurysm , aligning closely with generalized vascular disease risks. An aneurysm in this location is defined as a localized dilation exceeding 50% of the normal arterial diameter.
Endovascular aneurysm repair (EVAR) has become the preferred method, utilizing catheter-delivered stents to exclude the aneurysm from the circulation. Lifelong follow-up is recommended to monitor the integrity of the repair and to manage the underlying atherosclerotic disease that contributed to the aneurysm's formation.
Internal Iliac Artery Aneurysm: Anatomy and Pathophysiology Insights
Because the pelvis is a confined space, an enlarging aneurysm can compress adjacent nerves, veins, and the ureter, leading to a cascade of symptoms that are often subtle until the condition becomes critical. Complications and Long-Term Outlook Untreated, an internal iliac artery aneurysm poses a severe risk of rupture, which carries a high mortality rate due to the difficulty of achieving rapid control of hemorrhage in the pelvis.
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