open access

Vol 75, No 1 (2016)
CASE REPORTS
Published online: 2015-09-03
Submitted: 2015-03-25
Accepted: 2015-04-15
Get Citation

A rare case of dual origin of the left vertebral artery without convergence

K. Watanabe, T. Saga, J. Iwanaga, Y. Tabira, K. Yamaki
DOI: 10.5603/FM.a2015.0064
·
Pubmed: 26365864
·
Folia Morphol 2016;75(1):136-142.

open access

Vol 75, No 1 (2016)
CASE REPORTS
Published online: 2015-09-03
Submitted: 2015-03-25
Accepted: 2015-04-15

Abstract

A case of dual origin of the left vertebral artery was encountered in a dissection course for medical students in 2014. Two vertebral arteries were observed on the left side. One arose from the aortic arch between the origin of the left common carotid artery and the left subclavian artery, entered the transverse foramen of the 4th cervical vertebra, and coursed upward into the transverse foramen. The other arose from the left subclavian artery as expected, divided into two branches anterior to the cervical vertebrae, and entered the transverse foramina of the 6th and 7th cervical vertebrae. Both branches flowed into the anterior spinal artery. Moreover, as seen in other anomalies, 3 arterial fenestrations were observed in the cranial arteries. This case is extremely unique with respect to the following points: the 2 ipsilateral vertebral arteries did not combine to form 1 vertebral artery, the vertebral artery of subclavian artery origin entered the transverse foramen of the 7th cervical vertebra, and 3 fenestrations were observed in the intracranial arteries. This is a very suggestive case for neurosurgeons and radiologists who perform treatments involving the vertebral artery.

Abstract

A case of dual origin of the left vertebral artery was encountered in a dissection course for medical students in 2014. Two vertebral arteries were observed on the left side. One arose from the aortic arch between the origin of the left common carotid artery and the left subclavian artery, entered the transverse foramen of the 4th cervical vertebra, and coursed upward into the transverse foramen. The other arose from the left subclavian artery as expected, divided into two branches anterior to the cervical vertebrae, and entered the transverse foramina of the 6th and 7th cervical vertebrae. Both branches flowed into the anterior spinal artery. Moreover, as seen in other anomalies, 3 arterial fenestrations were observed in the cranial arteries. This case is extremely unique with respect to the following points: the 2 ipsilateral vertebral arteries did not combine to form 1 vertebral artery, the vertebral artery of subclavian artery origin entered the transverse foramen of the 7th cervical vertebra, and 3 fenestrations were observed in the intracranial arteries. This is a very suggestive case for neurosurgeons and radiologists who perform treatments involving the vertebral artery.

Get Citation

Keywords

vertebral artery, duplication, fenestration, anterior spinal artery, transverse foramen, intersegmental artery, longitudinal anastomosis

About this article
Title

A rare case of dual origin of the left vertebral artery without convergence

Journal

Folia Morphologica

Issue

Vol 75, No 1 (2016)

Pages

136-142

Published online

2015-09-03

DOI

10.5603/FM.a2015.0064

Pubmed

26365864

Bibliographic record

Folia Morphol 2016;75(1):136-142.

Keywords

vertebral artery
duplication
fenestration
anterior spinal artery
transverse foramen
intersegmental artery
longitudinal anastomosis

Authors

K. Watanabe
T. Saga
J. Iwanaga
Y. Tabira
K. Yamaki

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