Persistent trigeminal artery

Case contributed by Dr. Chris O'Donnell

Presentation

Dizziness

Patient Data

Age: 40 years
Gender: Female
MRI

Large persistent trigeminal artery passing from the left ICA to the terminal basilar artery via the cavernous sinus.  Note the grossly hypoplastic vertebro-basilar arterial system as a result of this congenital anomaly with most posterior circulation blood coming from the left ICA via the trigeminal artery.

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