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