A dissecting aneurysm is the separation of the layers of arterial wall by the circulating blood.1 In the cerebral blood vessels, it occurs between the internal elastic lamina and the media.1 In the aorta and other major vessels, it occurs between the inner two thirds and the outer one third of the media.1 Symptoms in the cerebral cases may mimic those of an acute stroke, and often occur in younger individuals. Recognition of this entity in its early stages and prompt surgical intervention aimed at halting the dissection seem to be the only forms of treatment that could prevent a serious outcome.1 Accurate angiographic interpretation may be of assistance in the early diagnosis of this entity.1 Although most reported cases of dissection of intracranial vessels have been fatal, and the lesions have been identified only at the time of autopsy, successful surgical intervention by ligation
Kalyan-Raman UP, Kowalski RV, Lee RH, Fierer JA. Dissecting Aneurysm of Superior Cerebellar Artery: Its Association With Fibromuscular Dysplasia. Arch Neurol. 1983;40(2):120–122. doi:10.1001/archneur.1983.04050020082021
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