open access

Vol 66, No 2 (2007)
CASE REPORTS
Published online: 2007-03-09
Submitted: 2012-02-06
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An unreported variation of the cervical vagus nerve: anatomical and histological observations

R.S. Tubbs, M. Loukas, M.M. Shoja, D. Blevins, R. Humphrey, G.D. Chua, D.R. Kelly, W.J. Oakes
Folia Morphol 2007;66(2):155-157.

open access

Vol 66, No 2 (2007)
CASE REPORTS
Published online: 2007-03-09
Submitted: 2012-02-06

Abstract

Variations involving the cervical portion of the vagus nerve are seemingly very rare. We report an adult male found to harbour a right cervical vagus nerve that crossed anterior to the right common carotid artery to terminate in the lateral aspect of the thyroid gland. A very small continuation of this nerve was found to continue distally into the thorax. Histologically, this part of the vagus nerve did not contain ganglion or other cell bodies. There were no heterologous inclusions (thyroid, parathyroid, thymus, salivary gland or branchial cleft remnants) present. Although grossly there was a connection into the thyroid gland, this was not observed histologically. No signs of trauma were found to the ipsilateral neck region. We hypothesise that this variation is due to entanglement between the thyroid gland and cervical vagus nerve during development. This rare variation might be considered by the clinician who operates in the cervical region or interprets imaging of the neck. To our knowledge, a vagus nerve with the above described morphology has not been described.

Abstract

Variations involving the cervical portion of the vagus nerve are seemingly very rare. We report an adult male found to harbour a right cervical vagus nerve that crossed anterior to the right common carotid artery to terminate in the lateral aspect of the thyroid gland. A very small continuation of this nerve was found to continue distally into the thorax. Histologically, this part of the vagus nerve did not contain ganglion or other cell bodies. There were no heterologous inclusions (thyroid, parathyroid, thymus, salivary gland or branchial cleft remnants) present. Although grossly there was a connection into the thyroid gland, this was not observed histologically. No signs of trauma were found to the ipsilateral neck region. We hypothesise that this variation is due to entanglement between the thyroid gland and cervical vagus nerve during development. This rare variation might be considered by the clinician who operates in the cervical region or interprets imaging of the neck. To our knowledge, a vagus nerve with the above described morphology has not been described.
Get Citation

Keywords

anatomy; neck; nervous system; variation; cranial nerve

About this article
Title

An unreported variation of the cervical vagus nerve: anatomical and histological observations

Journal

Folia Morphologica

Issue

Vol 66, No 2 (2007)

Pages

155-157

Published online

2007-03-09

Bibliographic record

Folia Morphol 2007;66(2):155-157.

Keywords

anatomy
neck
nervous system
variation
cranial nerve

Authors

R.S. Tubbs
M. Loukas
M.M. Shoja
D. Blevins
R. Humphrey
G.D. Chua
D.R. Kelly
W.J. Oakes

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