Middle Cerebral Artery Bifurcation Giant Aneurysm - Case 3

A 42 year-old woman developed headaches and slowly progressive left sided weakness over two months.

Outline the Giant Aneurysm     Outline the Clot Within the Aneurysm     Show the Compression of the R. Cerebral Peduncle

Middle Cerebral Artery Giant Aneurysm. Axial MRI scans; (Left) T1-weighted; (Right) T2-weighted. Note the large mass in the right frontal/temporal lobes associated with mass effect and vasogenic edema. On the T2-weighted scan, the mass has both white and dark signal, representing partially clotted blood (the dark signal is deoxyhemoglobin, whereas the bright signal is methemoglobin). This is a giant aneurysm of the middle cerebral artery which is mostly thrombosed.

Revised 11/23/06.
Copyrighted 2006. David C Preston