Figure 4. (a) An angiogram revealed a saccular aneurysm of the left subclavian artery. The configuration of the aneurysm was not clearly demonstrated. (b) CT angiography with three-dimensional volume rendering reconstructions clearly demonstrated the configuration of the aneurysm. The aneurysm was arising from the posterior aspect of the left subclavian artery. (c) After stent-graft placement and remodelling with a 10 mm angiography balloon, an angiogram showed complete occlusion of the aneurysm with no endoleakage.