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A case with near-occlusion with full collapse. Axial CTA at the level of the distal extracranial ICA. The distal right ICA (white arrow) is clearly collapsed with a threadlike appearance, clearly narrower than the contralateral ICA (black arrow) and the right ECA (white arrowhead). The black arrowhead points to the left ascending pharyngeal artery, ensuring that this is not an ICA occlusion.
