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Ultrasonography-Based Thyroidal and Perithyroidal Anatomy and Its Clinical Significance.

Ha EJ, Baek JH, Lee JH - Korean J Radiol (2015)

Bottom Line: For a safe and effective US-guided procedure, knowledge of neck anatomy, particularly that of the nerves, vessels, and other critical structures, is essential.Therefore, the aim of this article was to elucidate US-based thyroidal and perithyroidal anatomy, as well as its clinical significance in the use of prevention techniques for complications during the US-guided procedures.Knowledge of these areas may be helpful for maximizing the efficacy and minimizing the complications of US-guided procedures for the thyroid and other neck lesions.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Ajou University School of Medicine, Suwon 443-380, Korea.

ABSTRACT
Ultrasonography (US)-guided procedures such as ethanol ablation, radiofrequency ablation, laser ablation, selective nerve block, and core needle biopsy have been widely applied in the diagnosis and management of thyroid and neck lesions. For a safe and effective US-guided procedure, knowledge of neck anatomy, particularly that of the nerves, vessels, and other critical structures, is essential. However, most previous reports evaluated neck anatomy based on cadavers, computed tomography, or magnetic resonance imaging rather than US. Therefore, the aim of this article was to elucidate US-based thyroidal and perithyroidal anatomy, as well as its clinical significance in the use of prevention techniques for complications during the US-guided procedures. Knowledge of these areas may be helpful for maximizing the efficacy and minimizing the complications of US-guided procedures for the thyroid and other neck lesions.

No MeSH data available.


Transverse ultrasonography images of vagus nerve.(A) Vagus nerve (arrowhead) is usually located posterolateral to common carotid artery. However, vagus nerve (arrowheads) can be located anterior (B), medial (C), and posterior (D) to common carotid artery, and these variations place it closer to thyroid gland.
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Figure 3: Transverse ultrasonography images of vagus nerve.(A) Vagus nerve (arrowhead) is usually located posterolateral to common carotid artery. However, vagus nerve (arrowheads) can be located anterior (B), medial (C), and posterior (D) to common carotid artery, and these variations place it closer to thyroid gland.

Mentions: The vagus nerve is the longest cranial nerve. The cervical course of the vagus nerve can be easily visualized on US as a 2-mm to 3-mm diameter structure. It is typically located within the carotid sheath, and is usually posterolateral to the common carotid artery (CCA) and posteromedial to the internal jugular vein (IJV) (2021). The variation in the cervical course of the vagus nerve according to its position relative to the CCA has been previously reported (2325). The anterior variation in which the nerve passes in front of the CCA, is relatively common with a reported prevalence of up to 18.9%; whereas, medial or posterior variation has a lower prevalence (Fig. 3). A bulging thyroid mass outside the thyroid gland could also change the vagus nerve location anterior to the CCA by pushing the carotid sheath laterally and inducing vagus nerve variation (Fig. 4) (23).


Ultrasonography-Based Thyroidal and Perithyroidal Anatomy and Its Clinical Significance.

Ha EJ, Baek JH, Lee JH - Korean J Radiol (2015)

Transverse ultrasonography images of vagus nerve.(A) Vagus nerve (arrowhead) is usually located posterolateral to common carotid artery. However, vagus nerve (arrowheads) can be located anterior (B), medial (C), and posterior (D) to common carotid artery, and these variations place it closer to thyroid gland.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4499539&req=5

Figure 3: Transverse ultrasonography images of vagus nerve.(A) Vagus nerve (arrowhead) is usually located posterolateral to common carotid artery. However, vagus nerve (arrowheads) can be located anterior (B), medial (C), and posterior (D) to common carotid artery, and these variations place it closer to thyroid gland.
Mentions: The vagus nerve is the longest cranial nerve. The cervical course of the vagus nerve can be easily visualized on US as a 2-mm to 3-mm diameter structure. It is typically located within the carotid sheath, and is usually posterolateral to the common carotid artery (CCA) and posteromedial to the internal jugular vein (IJV) (2021). The variation in the cervical course of the vagus nerve according to its position relative to the CCA has been previously reported (2325). The anterior variation in which the nerve passes in front of the CCA, is relatively common with a reported prevalence of up to 18.9%; whereas, medial or posterior variation has a lower prevalence (Fig. 3). A bulging thyroid mass outside the thyroid gland could also change the vagus nerve location anterior to the CCA by pushing the carotid sheath laterally and inducing vagus nerve variation (Fig. 4) (23).

Bottom Line: For a safe and effective US-guided procedure, knowledge of neck anatomy, particularly that of the nerves, vessels, and other critical structures, is essential.Therefore, the aim of this article was to elucidate US-based thyroidal and perithyroidal anatomy, as well as its clinical significance in the use of prevention techniques for complications during the US-guided procedures.Knowledge of these areas may be helpful for maximizing the efficacy and minimizing the complications of US-guided procedures for the thyroid and other neck lesions.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Ajou University School of Medicine, Suwon 443-380, Korea.

ABSTRACT
Ultrasonography (US)-guided procedures such as ethanol ablation, radiofrequency ablation, laser ablation, selective nerve block, and core needle biopsy have been widely applied in the diagnosis and management of thyroid and neck lesions. For a safe and effective US-guided procedure, knowledge of neck anatomy, particularly that of the nerves, vessels, and other critical structures, is essential. However, most previous reports evaluated neck anatomy based on cadavers, computed tomography, or magnetic resonance imaging rather than US. Therefore, the aim of this article was to elucidate US-based thyroidal and perithyroidal anatomy, as well as its clinical significance in the use of prevention techniques for complications during the US-guided procedures. Knowledge of these areas may be helpful for maximizing the efficacy and minimizing the complications of US-guided procedures for the thyroid and other neck lesions.

No MeSH data available.