Fig. 1. Initial coronal CTA (A) showing a giant aneurysm of the V1 segment of the left vertebral artery. Axial CTA (B) showing bone erosion in the transverse foramen of the cervical vertebra. Repeated coronal CTA 10 days later (C) showing a thrombosed giant aneurysm of the left V1. CTA: computed tomography angiography.
