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Cervical magnetic resonance angiography (MRA) and head and neck computed tomography angiography (CTA). A & B. Cervical MRA demonstrated stenoses of bilateral carotid and vertebral arteries with crescent signal in the lumen of bilateral carotid arteries and right vertebral artery extracranial segment. C & D. Head and neck CTA displayed diffuse lesions with aneurysm-like changes in bilateral carotid and vertebral arteries.
