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<< Cervical Artery Dissection: Early Recognition and Stroke Prevention (Stroke CME, Trauma CME and Pharmacology CME)

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Intracranial Dissections

Intracranial dissections can arise due to extension of an extracranial dissection or as a result of a traumatic dissection that occurs intracranially due to mechanical forces generated by the dural membrane or surrounding bony structures. Approximately 60% of carotid artery dissections are solely in the extracranial regions, with 20% extending intracranially, and 20% occurring primarily intracranially.25,81 Vertebral artery dissections are more commonly located primarily in the extracranial regions, but intracranial extension occurs in approximately 10% and isolated intracranial dissections are present in approximately 10% of occurrences.25,81 Subarachnoid hemorrhage due to intracranial extension, development of aneurysm, and rupture of intracranial arteries occurs in approximately 15% of cases.25,27

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