Figure 18. Internal carotid artery aneurysm arising within the cavernous sinus. (a) Coronal plane T₁ weighted image at the level of the cavernous sinus in a patient presenting with symptoms including left V₁ and V₂ distribution sensory disturbance. The cavernous aneurysm is arrowed. (b) Maximal intensity projection reconstruction of a time-of-flight MR angiography sequence confirming the left cavernous carotid aneurysm (arrow).