Presentation
Dizziness
Patient Data
Age: 40 years
Gender: Female
From the case:
Persistent trigeminal artery
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MRA

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.