Neuroimaging clinics of North America
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Headache may be the most common presenting symptom of unruptured intracranial aneurysms. Unruptured intracranial aneurysm can be found in the work-up for headache but direct causality is not clear. ⋯ Many aspects of unruptured intracranial aneurysm-associated headaches are unclear, including the mechanism, discriminating characteristics, and localization. This article reviews basic knowledge on cerebral aneurysm and headache, and describes the possible mechanism and characteristics of aneurysm-associated headaches.