Persistent sciatic artery (PSA) is a rare congenital vascular anomaly with an incidence ranging from 0.025 to 0.06% of the general population. We report a 65-year-old male patient with bilateral PSA suffering from intermittent right-calf claudication. Peripheral pulsations could be palpated well at the right common femoral artery but not at the right popliteal artery. His ankle brachial index (ABI) was 0.79 on the right and 0.99 on the left. Computed tomographic (CT) angiography demonstrated that the bilateral PSAs were branched from the internal iliac arteries and the right PSA was completely occluded, whereas aneurysmal change was not evident. Both superficial femoral arteries were incompletely developed. Blood flow to the peroneal artery, anterior and posterior tibial arteries were maintained in both lower legs via a network of collateral arteries. Arterial bypass from right common femoral artery to the above-knee popliteal artery using knitted Dacron graft was performed and postoperative ABI of the right lower limb improved to 1.06. Ten months after the intervention, the patient was then suffered from intermittent left-calf claudication caused by complete occlusion of left PSA, therefore, above-knee femoropopliteal arterial bypass using knitted Dacron graft was performed. PSA is often asymptomatic until a complication develops and the careful monitoring to prevent the risk of thromboembolic and aneurysmal events are recommended.

A 76-year-old woman was admitted to our hospital because of sudden onset of chest pain and dyspnea. Echocardiography, chest CT, and cardiac catheterization revealed an isolated extracardiac unruptured left sinus of Valsalva aneurysm, with stenosis of the main trunk of the left coronary artery. Neither aortic regurgitation nor aortic annular dilatation was recognized. As an infection associated sinus of Valsalva aneurysm could not be ruled out, we performed patch closure using autologous pericardium and coronary artery bypass grafting to the left coronary system. The postoperative course was uneventful. One year after the operation, CT revealed that aneurysm of the left sinus of Valsalva had disappeared and that the grafts were patent.