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Papillary Microcarcinoma of the Thyroid: Predicting Factors of Lateral Neck Node Metastasis

  • Head and Neck Oncology
  • Published:
Annals of Surgical Oncology Aims and scope Submit manuscript

Abstract

Background

Preoperative prediction of lateral lymph node metastasis (LNM) is important to prevent recurrence; however, there are few published data in predicting factors of lateral LNM before surgery. The present study investigated the factors affecting LNM in patients with papillary thyroid microcarcinoma (PTMC).

Methods

A retrospective cohort study was conducted with data obtained from 671 patients with PTMC between 2004 and 2006. We reviewed the clinical, ultrasound (US), and pathology records of patients and analyzed the association between lateral LNM and clinical factors, US features of PTMC, and pathologic features.

Results

The rate of lateral LNM was 3.7% in 671 PTMCs. We found a statistically significant association between lateral LNM and US features of PTMC (upper pole location, contact of >25% with the adjacent capsule, and presence of calcifications), and pathologic features (central LNM) in multivariate analysis (P < .05). The odds ratios of statistically significant factors were 4.7 (95% confidence interval [95% CI], 1.8–12.6), 10.8 (95% CI, 3.3–34.6), 4.8 (95% CI, 1.6–13.7), and 6.9 (95% CI, 2.4–20) at upper pole location, contact of >25% with the adjacent capsule, presence of calcifications on US, and pathologic central LNM, respectively.

Conclusions

In patients with PTMC, independent factors in predicting lateral LNM were US features of PTMC (upper pole location, >25% contact with the adjacent capsule, and presence of calcifications) and pathologic features (central LNM). When these US features are detected on preoperative US, lateral neck nodes should be meticulously evaluated by a multimodal approach.

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Authors and Affiliations

  1. Department of Radiology, Research Institute of Radiological Science, Yonsei University College of Medicine, Seoul, Korea

    Jin Young Kwak MD, Eun-Kyung Kim MD, Min Jung Kim MD & Eun Ju Son MD

  2. Department of Surgery, Yonsei University College of Medicine, Seoul, Korea

    Woong Youn Chung MD, Cheong Soo Park MD & Kee-Hyun Nam MD

Authors
  1. Jin Young Kwak MD
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  2. Eun-Kyung Kim MD
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  3. Min Jung Kim MD
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  4. Eun Ju Son MD
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  5. Woong Youn Chung MD
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  7. Kee-Hyun Nam MD
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Correspondence to Eun-Kyung Kim MD.

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Kwak, J.Y., Kim, EK., Kim, M.J. et al. Papillary Microcarcinoma of the Thyroid: Predicting Factors of Lateral Neck Node Metastasis. Ann Surg Oncol 16, 1348–1355 (2009). https://doi.org/10.1245/s10434-009-0384-x

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  • DOI: https://doi.org/10.1245/s10434-009-0384-x

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