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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 27:1672-1674, September 2006
© 2006 American Society of Neuroradiology

Case Report
HEAD & NECK

Anterior Ethmoidal Artery Aneurysm and Intracerebral Hemorrhage

L.B. da Costa^a,b, T. Valiante^b, K. TerBrugge^c and M. Tymianski^b

^a Division of Neurosurgery, Benjamin Guimaraes Foundation/Hospital da Baleia, Belo Horizonte, Brazil
^b Division of Neurosurgery, Toronto Western Hospital, Toronto, Ontario, Canada
^c Department of Radiology, University of Toronto, Toronto, Ontario, Canada

Address correspondence to L.B. da Costa, MD, Division of Neurosurgery, Benjamin Guimaraes Foundation/Hospital da Baleia, CP 372, Belo Horizonte, CEP 30285-000, Brazil; e-mail: ldantejr{at}hotmail.com

SUMMARY: The association between the formation of intracranial aneurysms and situations of increased blood flow in certain areas of the brain is well accepted today. It has been seen in association with arteriovenous malformations of the brain, carotid occlusion, and Moyamoya disease. The occurrence of aneurysms in small arteries of the skull base, with the exception of the intracavernous carotid artery, however, is rare. We report a case of a 55-year-old woman who presented with an intracerebral hemorrhage caused by a ruptured anterior ethmoidal artery aneurysm. To the best of our knowledge, this is only the second case of documented intracranial bleeding from such a lesion.