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Baseline lateral DSA projection (A) demonstrating a posterior communicating artery aneurysm and normal flow in the anterior choroidal artery (white arrows). One-year follow-up angiography after placement of a PED and coils, unsubtracted mask (B) and DSA (C), confirm occlusion of the aneurysm with preservation of antegrade flow within the anterior choroidal artery (white arrows).
