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Figure 3: Angiograms demonstrating stages of Onyx embolization of a 53-year-old man presenting with severe headaches and found to have  mm left anterior choroidal aneurysm with 5 mm neck as seen in the A/P (a) and 3D reconstruction (b). (c) DSA showing magnified frontal and lateral. (d) Projection after Onyx embolization and placement of Enterprise stent.