Variant course of the left vertebral artery

Case contributed by Dr Matthew Lukies

Presentation

CT images uploaded to demonstrate variant anatomy of the left vertebral artery.

Patient Data

Age: 15
Gender: Male
Modality: CT

Left vertebral artery originates from the arch of the aorta and enters the C4 transverse foramen.

Case Discussion

This case demonstrates variant anatomy of the left vertebral artery. The origin is at the arch of aorta, in stead of the typical origin from the left subclavian artery, and the artery enters the transverse foramina of the cervical vertebrae at the C4 level, rather than the typical C6 level.

The origin of the left vertebral artery is from the aortic arch in approximately 5% of people, and is more commonly variant than the right. If the left vertebral artery originates at the arch of aorta, it is then more likely to enter the transverse foramina of the cervical vertebrae at a level higher than C6.1

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Case Information

rID: 47008
Case created: 27th Jul 2016
Last edited: 7th Aug 2016
System: Vascular
Inclusion in quiz mode: Excluded

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