Quadruple Spontaneous Cervical Artery Dissection Following Aneurysm Embolization: A Rare Posttreatment Complication

A, Left ICA angiogram showing the working projection. B, Axial CTA before embolization. Note the normal aspect of both the ICA and VA (arrows). C and D, Axial CTA at symptom onset shows expansion of the outer wall with narrowing of the vessel lumen, pseudoaneurysms in both the ICA and VA (arrows), and enlargement of the outer diameter with luminal stenosis of the left VA (arrow).