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A case of iliac aneurysm with persistent sciatic artery treated by endovascular aneurysm repair (EVAR).
Annals of Vascular Surgery 2018 October 19
A persistent sciatic artery (PSA) is a rare congenital vascular anomaly that occurs in approximately 0.01 to 0.06% of the population. We encountered a patient with aneurysms in the common iliac-internal iliac artery continuous to an occluded right PSA. The patient was an 85-year-old male in whom intermittent claudication of the right lower limb appeared 3 months ago. The right ankle brachial index (ABI) was 0.48. On contrast CT, the right PSA was present and was occluded over the popliteal artery. The right superficial femoral artery was hypoplastic. Moreover, abdominal aortic (diameter: 42 mm) and right common-internal iliac (diameter: 46 mm) aneurysms continuous to the PSA were present. For the surgical procedure, endovascular aneurysm repair (EVAR) was selected. First, the right internal iliac artery was embolized, an aorto-uni-iliac (AUI) stent graft was placed from the infrarenal aorta down to the left common iliac artery, and left common femoral-right deep femoral artery bypass was performed to achieve revascularization of the right lower limb. Postoperatively, the aneurysms were favorably excluded with stent grafts without endoleak. The right ABI markedly improved to 0.83, and claudication was resolved. There are few reports of iliac aneurysm with a concomitant PSA.
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