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A, Sagittal view of aneurysm embolized with Onyx. Note incomplete packing of the aneurysm, multiple fragmentation of the embolic mass (open arrow), and recanalization of the aneurysm inflow zone (solid arrow) (hematoxylin-eosin, ×4).
B, Macroscopic appearance of the neck of the aneurysm with Onyx migration into the parent artery (arrow). No significant thrombus formation was observed.
