Figure 10

25-year old woman involved in a rollover motor vehicle collision. On admission to the hospital, a screening four-vessel angiogram revealed a pseudoaneurysm of the left vertebral artery at the level of the C1–C2 disc space. Follow-up angiography performed 7 days later revealed enlargement of the pseudoaneurysm and concomitant narrowing of the vertebral artery. Due to the tortuosity of the vertebral artery, stent placement was not deemed a viable option and the vertebral artery was embolized. Lateral digital subtraction angiogram, left vertebral artery. Notice the pseudoaneurysm arising from the distal vertebral artery (arrow), and the adjacent vertebral artery narrowing.