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HOME > Endocrinol Metab > Volume 33(1); 2018 > Article
Letter
Active Surveillance of Papillary Thyroid Microcarcinoma: A Mini-Review from Korea (Endocrinol Metab 2017;32:399-406, Tae Yong Kim et al.)
Hui Sun1,2, Gianlorenzo Dionigi3orcid
Endocrinology and Metabolism 2018;33(1):135-136.
DOI: https://doi.org/10.3803/EnM.2018.33.1.135
Published online: March 21, 2018

1Division of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Changchun, China.

2Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, China.

3Division for Endocrine and Minimally Invasive Surgery, Department of Human Pathology in Adulthood and Childhood “G. Barresi”, University Hospital G. Martino, University of Messina, Messina, Italy.

Corresponding author: Gianlorenzo Dionigi. Division for Endocrine and Minimally Invasive Surgery, Department of Human Pathology in Adulthood and Childhood “G. Barresi”, University Hospital G. Martino, University of Messina, Via C. Valeria 1, Messina 98125, Italy. Tel: +39-0902212637, Fax: +39-0902212611, gdionigi@unime.it

Copyright © 2018 Korean Endocrine Society

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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ⓘ
We read with interest the paper by Prof. Kim and Shong, entitled “Active surveillance of papillary thyroid microcarcinoma: a mini-review from Korea,” published in the December 2017 issue of Endocrinology and Metabolism (Seoul) [1]. Overdetection and overtreatment are common in many areas of modern medicine. Several steps are needed to decrease overdetection: elderly subjects who are unlikely to benefit should not be screened, biopsies should not be performed without a compelling reason, the screening interval should be stratified by risk, and the focus should be on screening subjects at high risk for disease progression [12]. Treatment should be tailored to the biological characteristics of the tumor and the patient's characteristics, and active surveillance (AS) should be offered to eligible patients with low-risk tumors, especially small-volume disease, as the first step in management [123]. Many low-grade papillary microcarcinomas are unlikely to progress to clinical symptoms, and pose a limited risk of death if left untreated [2]. Several AS criteria have been suggested for delayed treatment [4]. Although the upgrading and/or upstaging of cancer is a limitation of AS, recent reports have shown low rates of cancer-specific mortality [4].
Nevertheless, the long-term safety of AS depends on the clinician's ability to initiate timely delayed interventions in those who need them, and to avoid overtreatment in those who do not.
In contrast, with immediate surgery, early-stage tumors are excised at a more treatable stage, fewer patients develop metastatic disease, less extensive surgery (hemithyroidectomy) is more likely, and minimally invasive approaches are applied; additionally, there is no need for lifelong thyroid replacement therapy, consistent follow-up, or risk factor assessments, and low-dose or no radioactive iodine administration is needed [5]. The increasing use of minimally invasive surgery, including robot-assisted surgery, has contributed to better functional outcomes [5]. Well-designed long-term randomized studies will be required to compare the benefits of AS and immediate, minimally invasive hemithyroidectomy.
Thank you for the opportunity to present our reflections on this paper.

CONFLICTS OF INTEREST: No potential conflict of interest relevant to this article was reported.

  • 1. Kim TY, Shong YK. Active surveillance of papillary thyroid microcarcinoma: a mini-review from Korea. Endocrinol Metab (Seoul) 2017;32:399–406. ArticlePubMedPMCPDF
  • 2. Kim HI, Jang HW, Ahn HS, Ahn S, Park SY, Oh YL, et al. High serum TSH level is associated with progression of papillary thyroid microcarcinoma during active surveillance. J Clin Endocrinol Metab 2018;103:446–451. ArticlePubMedPDF
  • 3. Miyauchi A, Ito Y, Oda H. Insights into the management of papillary microcarcinoma of the thyroid. Thyroid 2018;28:23–31. ArticlePubMedPMCPDF
  • 4. Oda H, Miyauchi A, Ito Y, Yoshioka K, Nakayama A, Sasai H, et al. Incidences of unfavorable events in the management of low-risk papillary microcarcinoma of the thyroid by active surveillance versus immediate surgery. Thyroid 2016;26:150–155. ArticlePubMedPMCPDF
  • 5. An JH, Kim HY, Kim SG, Dralle H, Randolph GW, Piantanida E, et al. Endpoints for screening thyroid cancer in the Republic of Korea: thyroid specialists' perspectives. J Endocrinol Invest 2017;40:683–685. ArticlePubMedPDF

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    • Diagnosis of thyroid cancer using a TI-RADS-based computer-aided diagnosis system: a multicenter retrospective study
      Zhuang Jin, Yaqiong Zhu, Shijie Zhang, Fang Xie, Mingbo Zhang, Yanli Guo, Hui Wang, Qiang Zhu, Junying Cao, Yukun Luo
      Clinical Imaging.2021; 80: 43.     CrossRef

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      Active Surveillance of Papillary Thyroid Microcarcinoma: A Mini-Review from Korea (Endocrinol Metab 2017;32:399-406, Tae Yong Kim et al.)
      Endocrinol Metab. 2018;33(1):135-136.   Published online March 21, 2018
      DOI: https://doi.org/10.3803/EnM.2018.33.1.135
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