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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 SAN.A. Schematic drawing of SAN. B. SAN (arrowhead) is located under SCM in upper neck. (C) It is located in subcutaneous layer superficial to LSM in middle (arrowhead), and (D) is located between TZ and LSM in lower neck (arrowhead). LSM = levator scapulae muscle, SAN = spinal accessory nerve, SCM = sternocleidomastoid muscle, TZ= trapezius muscle
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Figure 12: Transverse ultrasonography images of SAN.A. Schematic drawing of SAN. B. SAN (arrowhead) is located under SCM in upper neck. (C) It is located in subcutaneous layer superficial to LSM in middle (arrowhead), and (D) is located between TZ and LSM in lower neck (arrowhead). LSM = levator scapulae muscle, SAN = spinal accessory nerve, SCM = sternocleidomastoid muscle, TZ= trapezius muscle

Mentions: The spinal accessory nerve (SAN) is a motor nerve that supplies the SCM and trapezius muscles. The SAN can be clearly depicted between the lateroposterior border of the SCM muscle and anterior border of the trapezius muscle on US; however, it requires experience due to the thinness of the nerve (5152). The mean diameter of the SAN is 0.54 ± 0.09 mm (515253), and the SAN is easily identified in the fat layer between the trapezius and levator scapulae muscles due to its superficial location. It can then be traced inferiorly into the trapezius muscle and superiorly deep into the SCM muscle, or between the 2 heads of the SCM muscle (Fig. 12) (51525354).


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

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

Transverse ultrasonography images of SAN.A. Schematic drawing of SAN. B. SAN (arrowhead) is located under SCM in upper neck. (C) It is located in subcutaneous layer superficial to LSM in middle (arrowhead), and (D) is located between TZ and LSM in lower neck (arrowhead). LSM = levator scapulae muscle, SAN = spinal accessory nerve, SCM = sternocleidomastoid muscle, TZ= trapezius muscle
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 12: Transverse ultrasonography images of SAN.A. Schematic drawing of SAN. B. SAN (arrowhead) is located under SCM in upper neck. (C) It is located in subcutaneous layer superficial to LSM in middle (arrowhead), and (D) is located between TZ and LSM in lower neck (arrowhead). LSM = levator scapulae muscle, SAN = spinal accessory nerve, SCM = sternocleidomastoid muscle, TZ= trapezius muscle
Mentions: The spinal accessory nerve (SAN) is a motor nerve that supplies the SCM and trapezius muscles. The SAN can be clearly depicted between the lateroposterior border of the SCM muscle and anterior border of the trapezius muscle on US; however, it requires experience due to the thinness of the nerve (5152). The mean diameter of the SAN is 0.54 ± 0.09 mm (515253), and the SAN is easily identified in the fat layer between the trapezius and levator scapulae muscles due to its superficial location. It can then be traced inferiorly into the trapezius muscle and superiorly deep into the SCM muscle, or between the 2 heads of the SCM muscle (Fig. 12) (51525354).

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.