A, Anteroposterior digital subtraction angiogram shows the aneurysm (arrow) before treatment. B, DSA image immediately after device deployment shows partial aneurysm occlusion (block arrow). C, DSA image at 12 months shows complete aneurysm occlusion (notched arrow). D, Photomicrograph stained with toluidine blue and basic fuchsin shows partially organized thrombus within the aneurysm sealed with complete neointima incorporating the FRED struts and mesh across the neck, magnification 15×.