Carotid Cavernous Sinus Fistula,MRI

Numéro d’image : 12036546
Carotid Cavernous Sinus Fistula,MRI
This maximum intensity projection (MIP) image from an intracranial MRA demonstrates marked abnormal venous filling (on the viewer's left). These changes reflect a post-traumatic carotid cavernous sinus fistula. These occur as a result of a traumatic tear of the internal carotid artery within the cavernous sinus,resulting in an arterial-venous shunt directly into the cavernous sinus and its venous outflow,which often includes orbital venous drainage. The degree of cortical venous drainage/congestion directly correlates with the biologic aggressiveness of these lesions. Those with abundant cortical venous drainage/outflow have a high risk for intracranial hemorrhage. These are often treated through endovascular embolization techniques
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