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Spontaneous Murine Model of Anaplastic Thyroid Cancer
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[Cervical lymph node metastasis in medullary thyroid carcinoma].

Dangui Yan1, Bin Zhang2, Zhengjiang Li1

  • 1Department of Head and Neck Surgery, Cancer Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing 100021, China.

Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi = Chinese Journal of Otorhinolaryngology Head and Neck Surgery
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Medullary thyroid carcinoma frequently metastasizes to cervical lymph nodes. Central compartment dissection is crucial for cN0 patients with extracapsular spread, while comprehensive neck dissection is needed for cN+ patients.

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Area of Science:

  • Oncology
  • Surgical Pathology

Background:

  • Medullary thyroid carcinoma (MTC) presents a significant risk of cervical lymph node metastasis.
  • Understanding metastasis patterns is crucial for effective surgical management.

Purpose of the Study:

  • To elucidate the patterns of cervical lymph node metastasis in medullary thyroid carcinoma.
  • To identify predictive factors for lymph node involvement.

Main Methods:

  • Retrospective analysis of 91 MTC patients (1999-2014).
  • Evaluation of lymph node (LN) metastasis across neck levels in clinically node-negative (cN0) and node-positive (cN+) patients.
  • Statistical analysis to determine factors predicting central compartment metastasis.

Main Results:

  • High rates of neck (73.6%) and bilateral neck (19.8%) metastasis observed.
  • Central compartment metastasis occurred in 68.1% of cases, significantly higher in cN+ (94.2%) vs. cN0 (33.3%) patients.
  • Extracapsular spread was a key predictor of central compartment metastasis; elevated preoperative calcitonin (>300 ng/L) correlated with lateral neck metastasis.

Conclusions:

  • Cervical lymph node metastasis is prevalent in MTC.
  • Central compartment dissection is indicated for cN0 patients with extracapsular spread.
  • Extensive neck dissection (levels II-VII) is recommended for cN+ patients, with calcitonin levels potentially guiding lateral neck dissection extent.