Abstract
Cervical lymph node metastasis is frequent in patients with papillary thyroid carcinoma. In addition to the extent of thyroidectomy, the need as well as the extent of concomitant lymphadenectomy has been a subject of controversy and debate. The central compartment is the most frequent site of metastasis followed by the lateral compartment although skip metastasis in the lateral compartment can occur. Papillary thyroid carcinoma can also present with cervical lymph node metastasis, while the primary tumor remains clinically undetectable. Surgical removal of clinically involved nodal metastasis should be mandatory to prevent recurrence and improve disease prognosis. However, despite a low accuracy of preoperative imaging for microscopic disease and the frequent microscopic metastasis to the central compartment, routine prophylactic neck dissection has not been shown to have any relevance to prevent recurrence or improve disease cure. Routine or prophylactic central compartment dissection is generally not recommended unless in the presence of high-risk tumors. The potential benefit of reducing central compartment recurrence or avoiding high-risk reoperation probably outweighs the risk of inducing surgical complication including hypoparathyroidism during routine central neck dissection. Therapeutic lateral neck dissection is performed for clinically involved nodes detected by preoperative imaging confirmed by needle biopsy, while prophylactic lateral neck dissection is contraindicated. The extent of neck dissection has been de-escalated, and compartmental nodal dissection aiming at preservation of function is performed to achieve a complete surgical resection. Postoperative adjuvant radioiodine is frequently administered for patients with positive nodal metastasis (intermediate-risk group) to avoid future recurrence. Routine central neck dissection may also upstage patients with microscopic nodal metastases and increase the use of postoperative adjuvant radioiodine.
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Lo, C.Y. (2022). Lymph Node Dissection for Papillary Thyroid Carcinoma. In: Lam, A.K. (eds) Papillary Thyroid Carcinoma. Methods in Molecular Biology, vol 2534. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-2505-7_5
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DOI: https://doi.org/10.1007/978-1-0716-2505-7_5
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