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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 25:421-424, March 2004
© 2004 American Society of Neuroradiology

Case Report
BRAIN

Pseudofenestration of the Cervical Internal Carotid Artery: A Pathologic Process that Simulates an Anatomic Variant

Philippe Gailloud^a, Jeffrey Carpenter^a, Donald V. Heck^a and Kieran J. Murphy^a

^a From the Division of Interventional Neuroradiology, Johns Hopkins Medical Institutions, Baltimore, MD

Address correspondence to Philippe Gailloud, MD, Division of Interventional Neuroradiology, Department of Radiology and Radiological Sciences, Johns Hopkins Medical Institutions, Baltimore, MD 21287

Summary: Fenestration of the cervical segment of the internal carotid artery (ICA) is considered an extremely rare anatomic variant, with, to the best of our knowledge, only four cases reported in the literature. We report six angiographic observations of apparent fenestration of the cervical ICA, which we believe are secondary to arterial dissection. We discuss the angiographic appearance of these pseudofenestrations and their potential clinical implications.

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