A Case of Abdominal Aortic Aneurysm with Persistent Sciatic Artery Treated by Graft Replacement and Femoropopliteal Bypass

Abstract

Persistent sciatic artery is relatively rare congenital variant of the lower limb vasculature left by the sciatic artery forming the dominant supply to the leg during early embryonic development and extremely rare complicated with abdominal aortic aneurysm. A 65-year-old man was referred to our hospital with abdominal aortic aneurysm pointed out by a previous doctor. The enhanced CT scan showed abdominal aortic aneurysm measuring 53 mm and complete left persistent sciatic artery. Left external iliac and femoral arteries were hypoplastic. In addition to abdominal aortic aneurysm, we plan to treat left persistent artery which have a propensity toward aneurysmal or occlusive degeneration. We performed abdominal aortic aneurysm graft replacement, ligation of left persistent sciatic artery, and left femoropopliteal bypass. Postoperative CT scan showed complete thrombosis of the left persistent sciatic artery.