| Summary: | Persistent trigeminal artery (PTA) represent an unusual remnant of the fetal carotid-basilar
anastomosis. Persistent trigeminal artery variant (PTAV) is a rare anastomosis between the internal
carotid artery and cerebellar artery, without an interposing basilar artery segment. We
report the case of 49-year-old female with an incidentally discovered, rare variation of PTA that
directly terminated in the ipsilateral superior cerebellar artery. The variation was observed on
CT angiography, digital subtraction angiography, and MR angiography. Additionally, we reviewed
the embryogenesis of PTA and PTAV and discussed the clinical implications of this variation.
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