A Review of Two Cases of Fenestrated Internal Jugular Veins as Seen by CT Angiography

Summary: Venous fenestrations are a rarely seen entity in the neck. Although their clinical significance is question-able, their importance in presurgical planning may be con-siderable. We present a report of two cases of internal jugular vein fenestration. Fenestrations, or complete divisions of vasculature, have been described in many of the craniocervical arteries. One postmortem study has shown that as many as 6 % of people have a fenestrated basilar artery (1). Arterial fenestrations have been described in the vertebral artery, the basilar artery, the middle cerebral artery, the anterior cerebral artery, the pos-terioinferior cerebellar artery, the posterior cerebral artery, the posterior communicating artery, and the internal carotid artery. Although multiple craniocer-vical arterial fenestrations have been described, ve-nous fenestrations have not. Two recent cases of in-ternal jugular vein fenestrations are described herein