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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.


Small remnant of thyroid tissue.A. Schematic drawing shows RLN course at ligament of Berry. Dotted line represents thyroid gland. (B) On transverse and (C, D) longitudinal scans, small remnant of thyroid tissue (arrowheads) can be seen at upper pole of thyroid gland after thyroid surgery. eSLN = external branch of superior laryngeal nerve, iSLN = internal branch of superior laryngeal nerve, RLN = recurrent laryngeal nerve
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Figure 7: Small remnant of thyroid tissue.A. Schematic drawing shows RLN course at ligament of Berry. Dotted line represents thyroid gland. (B) On transverse and (C, D) longitudinal scans, small remnant of thyroid tissue (arrowheads) can be seen at upper pole of thyroid gland after thyroid surgery. eSLN = external branch of superior laryngeal nerve, iSLN = internal branch of superior laryngeal nerve, RLN = recurrent laryngeal nerve

Mentions: Recurrent laryngeal nerve injury causes symptoms such as voice change and cough, and is usually caused by an injury during biopsy or minimally invasive treatment. FNA or CNB for thyroid or neck lesions can cause direct damage by needle or compression by swelling or hematoma (34). Direct thermal or chemical injury to the RLN can occur during minimally invasive treatment (1335). Minimizing heat exposure to the tracheoesophageal groove (so called as a danger triangle which includes the RLN, trachea, and esophagus) is crucial to prevent complications; thus, operators should be aware of possible injuries to the RLN located near the posteromedial portion of the thyroid gland and also for the treatment of recurrent tumors at the operation bed (133536). The small remnant of thyroid tissue could be detected after thyroid surgery near the lateral thyrohyoid ligament (ligament of Berry) to prevent RLN injury during surgery (37). Understanding these anatomies could prevent unnecessary FNAs or diagnostic surgery for remnant thyroid tissue (Fig. 7).


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

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

Small remnant of thyroid tissue.A. Schematic drawing shows RLN course at ligament of Berry. Dotted line represents thyroid gland. (B) On transverse and (C, D) longitudinal scans, small remnant of thyroid tissue (arrowheads) can be seen at upper pole of thyroid gland after thyroid surgery. eSLN = external branch of superior laryngeal nerve, iSLN = internal branch of superior laryngeal nerve, RLN = recurrent laryngeal nerve
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 7: Small remnant of thyroid tissue.A. Schematic drawing shows RLN course at ligament of Berry. Dotted line represents thyroid gland. (B) On transverse and (C, D) longitudinal scans, small remnant of thyroid tissue (arrowheads) can be seen at upper pole of thyroid gland after thyroid surgery. eSLN = external branch of superior laryngeal nerve, iSLN = internal branch of superior laryngeal nerve, RLN = recurrent laryngeal nerve
Mentions: Recurrent laryngeal nerve injury causes symptoms such as voice change and cough, and is usually caused by an injury during biopsy or minimally invasive treatment. FNA or CNB for thyroid or neck lesions can cause direct damage by needle or compression by swelling or hematoma (34). Direct thermal or chemical injury to the RLN can occur during minimally invasive treatment (1335). Minimizing heat exposure to the tracheoesophageal groove (so called as a danger triangle which includes the RLN, trachea, and esophagus) is crucial to prevent complications; thus, operators should be aware of possible injuries to the RLN located near the posteromedial portion of the thyroid gland and also for the treatment of recurrent tumors at the operation bed (133536). The small remnant of thyroid tissue could be detected after thyroid surgery near the lateral thyrohyoid ligament (ligament of Berry) to prevent RLN injury during surgery (37). Understanding these anatomies could prevent unnecessary FNAs or diagnostic surgery for remnant thyroid tissue (Fig. 7).

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.