Middle and Posterior Cerebral Artery Infarction - Case 2

A 65 year-old woman developed the abrupt onset of a right gaze preference, left hemiplegia, and left visual field loss.

Outline the Infarction  Show the Hemorrhage  Show the Midline Shift  Show the Cingulate Herniation  Show the Surgically Removed Bone

Middle and Posterior Cerebral Artery Infarction. Axial CT scans; (Left) Day 2; (Right) Day 4. Note the large infarction in the distribution of the right middle and posterior cerebral arteries. As the PCA territory infarct is darker, this lesion is several days older than the MCA infarct. There is also a small hemorrhagic transformation deep in the basal ganglia.

This is typically a lethal lesion in a person of this age. As this stroke is so large, it will cause increased intracranial pressure as it swells, ultimately resulting in herniation and death. To prevent intracranial herniation, a hemicraniectomy can be performed (right image) wherein a skull flap is removed. Hence, the brain is allowed to swell and herniate extracranially. On the image on the right, one can see herniation of brain through the surgical opening. This procedure is most appropriate to consider in patients with very large strokes, especially those with large right sided lesions, wherein the primary language area is unaffected.  


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