Persistent trigeminal artery

Case contributed by Dr Chris O'Donnell ◉

Diagnosis certain

Presentation

Dizziness

Patient Data

Age: 40 years

Gender: Female

From the case: Persistent trigeminal artery

MRI

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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.