J Korean Soc Radiol.  2016 Oct;75(4):309-312. 10.3348/jksr.2016.75.4.309.

Variations of Persistent Trigeminal Artery Terminating in the Anterior Inferior Cerebellar Artery: A Case Report

• Hwang YU
• Kim JW
• Lee BH
• Hwang YJ

• KMID: 2353683
• DOI: http://doi.org/10.3348/jksr.2016.75.4.309

Abstract

Persistent trigeminal artery (PTA) is a rare condition that represents a remnant fetal anastomosis between the carotid artery and basilar artery. PTA typically arises from precavernous portion of the internal carotid artery (ICA) to the basilar artery. Variations of PTA extending from the ICA and directly terminating as cerebellar arteries without jointing basilar artery are particularly rare. We presented the extremely rare case of the variations of PTA, which directly terminate in the ipsilateral anterior inferior cerebellar artery. In addition, we reviewed the embryogenesis and clinical implication of this anomaly.

MeSH Terms

Anatomic Variation
Arteries*
Basilar Artery
Carotid Arteries
Carotid Artery, Internal
Central Nervous System Vascular Malformations
Cerebral Angiography
Embryonic Development
Female
Joints
Pregnancy

Figure

• 

  Fig. 1 Digital subtraction angiography of left vertebral artery. Anterioposterior (A) and lateral (B) view of left vertebral artery injection show luminal irregularity and narrowing of left distal vertebral artery (arrow), suggesting arterial dissection.

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  Fig. 2 Right vertebral artery injection (A) shows left anterior inferior cerebellar artery agenesis. Left internal carotid artery injection (B) in the lateral projection demonstrate the variation of persistent trigeminal artery (arrow) that supplies the anterior inferior cerebellar arteries (arrowhead).

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