Legend CE-MRA MIP: Aneurysmal enlargement of the left cavernous carotid artery. Also, a high-grade stenosis of proximal LICA and left vertebral arteries.

Legend Ax T2W: Aneurysm of left cavernous carotid artery, with low T2W signal. Cor T1W: Aneurysm shows heterogeneous high and low T1W signal, and post gadolinium, significant central enhancement (top right). Note the flow artifact in the phase-encoding direction of all 3 images.

Legend 3D TOF MRA: Peripheral flow-related enhancement is seen in the large left cavernous carotid aneurysm, with central low-signal; MIP images demonstrate smooth contour of aneurysm. Key words: mri mra vascular

Brain Diagnosis: Cavernous carotid aneurysm