Endocrinology and Metabolism

Original Articles

Thyroid
Association between Thyroid Function and Heart Rate Monitored by Wearable Devices in Patients with Hypothyroidism: Ki-Hun Kim, Juhui Lee, Chang Ho Ahn, Hyeong Won Yu, June Young Choi, Ho-Young Lee, Won Woo Lee, Jae Hoon Moon; Endocrinol Metab. 2021;36(5):1121-1130. Published online October 21, 2021; DOI: https://doi.org/10.3803/EnM.2021.1216

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Background
Heart rate (HR) monitored by a wearable device (WD) has demonstrated its clinical feasibility for thyrotoxicosis subjects. However, the association of HR monitored by wearables with hypothyroidism has not been examined. We assessed the association between serum thyroid hormone concentration and three WD-HR parameters in hypothyroid subjects.
Methods
Forty-four subjects scheduled for radioactive iodine therapy (RAI Tx) after thyroid cancer surgery were included. Thirty subjects were prepared for RAI Tx by thyroid hormone withdrawal (hypothyroidism group) and 14 subjects by recombinant human thyrotropin (control group). Three WD-HR parameters were calculated from the HR data collected during rest, during sleep, and from 2:00 AM to 6:00 AM, respectively. We analyzed the changes in conventionally measured resting HR (On-site rHR) and WDHR parameters relative to thyroid hormone levels.
Results
Serum free thyroxine (T4) levels, On-site rHR, and WD-HR parameters were lower in the hypothyroid group than in the control group at the time of RAI Tx. WD-HR parameters also reflected minute changes in free T4 levels. A decrease in On-site rHR and WD-HR parameters by one standard deviation (On-site rHR, approximately 12 bpm; WD-HR parameters, approximately 8 bpm) was associated with a 0.2 ng/dL decrease in free T4 levels (P<0.01) and a 2-fold increase of the odds ratio of hypothyroidism (P<0.01). WD-HR parameters displayed a better goodness-of-fit measure (lower quasi-information criterion value) than On-site rHR in predicting the hypothyroidism.
Conclusion
This study identified WD-HR parameters as informative and easy-to-measure biomarkers to predict hypothyroidism.

Citations

Citations to this article as recorded by

Application of wearables for remote monitoring of oncology patients: A scoping review
Katharina Cloß, Marlo Verket, Dirk Müller-Wieland, Nikolaus Marx, Katharina Schuett, Edgar Jost, Martina Crysandt, Fabian Beier, Tim H Brümmendorf, Guido Kobbe, Julia Brandts, Malte Jacobsen
DIGITAL HEALTH.2024;[Epub] CrossRef
Thyroid hormone action during GABAergic neuron maturation: The quest for mechanisms
Sabine Richard, Juan Ren, Frédéric Flamant
Frontiers in Endocrinology.2023;[Epub] CrossRef
A machine learning-assisted system to predict thyrotoxicosis using patients’ heart rate monitoring data: a retrospective cohort study
Kyubo Shin, Jongchan Kim, Jaemin Park, Tae Jung Oh, Sung Hye Kong, Chang Ho Ahn, Joon Ho Moon, Min Joo Kim, Jae Hoon Moon
Scientific Reports.2023;[Epub] CrossRef

Thyroid
A Multicenter, Randomized, Controlled Trial for Assessing the Usefulness of Suppressing Thyroid Stimulating Hormone Target Levels after Thyroid Lobectomy in Low to Intermediate Risk Thyroid Cancer Patients (MASTER): A Study Protocol: Eun Kyung Lee, Yea Eun Kang, Young Joo Park, Bon Seok Koo, Ki-Wook Chung, Eu Jeong Ku, Ho-Ryun Won, Won Sang Yoo, Eonju Jeon, Se Hyun Paek, Yong Sang Lee, Dong Mee Lim, Yong Joon Suh, Ha Kyoung Park, Hyo-Jeong Kim, Bo Hyun Kim, Mijin Kim, Sun Wook Kim, Ka Hee Yi, Sue K. Park, Eun-Jae Jung, June Young Choi, Ja Seong Bae, Joon Hwa Hong, Kee-Hyun Nam, Young Ki Lee, Hyeong Won Yu, Sujeong Go, Young Mi Kang, MASTER study group; Endocrinol Metab. 2021;36(3):574-581. Published online May 26, 2021; DOI: https://doi.org/10.3803/EnM.2020.943

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Background
Postoperative thyroid stimulating hormone (TSH) suppression therapy is recommended for patients with intermediate- and high-risk differentiated thyroid cancer to prevent the recurrence of thyroid cancer. With the recent increase in small thyroid cancer cases, the extent of resection during surgery has generally decreased. Therefore, questions have been raised about the efficacy and long-term side effects of TSH suppression therapy in patients who have undergone a lobectomy.
Methods
This is a multicenter, prospective, randomized, controlled clinical trial in which 2,986 patients with papillary thyroid cancer are randomized into a high-TSH group (intervention) and a low-TSH group (control) after having undergone a lobectomy. The principle of treatment includes a TSH-lowering regimen aimed at TSH levels between 0.3 and 1.99 μIU/mL in the low-TSH group. The high-TSH group targets TSH levels between 2.0 and 7.99 μIU/mL. The dose of levothyroxine will be adjusted at each visit to maintain the target TSH level. The primary outcome is recurrence-free survival, as assessed by neck ultrasound every 6 to 12 months. Secondary endpoints include disease-free survival, overall survival, success rate in reaching the TSH target range, the proportion of patients with major cardiovascular diseases or bone metabolic disease, the quality of life, and medical costs. The follow-up period is 5 years.
Conclusion
The results of this trial will contribute to establishing the optimal indication for TSH suppression therapy in low-risk papillary thyroid cancer patients by evaluating the benefit and harm of lowering TSH levels in terms of recurrence, metabolic complications, costs, and quality of life.

Citations

Citations to this article as recorded by

Effect of thyroid-stimulating hormone suppression on quality of life in thyroid lobectomy patients: interim analysis of a multicenter, randomized controlled trial in low- to intermediate-risk thyroid cancer patients (MASTER study)
Ja Kyung Lee, Eu Jeong Ku, Su-jin Kim, Woochul Kim, Jae Won Cho, Kyong Yeun Jung, Hyeong Won Yu, Yea Eun Kang, Mijin Kim, Hee Kyung Kim, Junsun Ryu, June Young Choi
Annals of Surgical Treatment and Research.2024; 106(1): 19. CrossRef
Clinical impact of coexistent chronic lymphocytic thyroiditis on central lymph node metastasis in low- to intermediate-risk papillary thyroid carcinoma: The MASTER study
Da Beom Heo, Ho-Ryun Won, Kyung Tae, Yea Eun Kang, Eonju Jeon, Yong Bae Ji, Jae Won Chang, June Young Choi, Hyeong Won Yu, Eu Jeong Ku, Eun Kyung Lee, Mijin Kim, Jun-Ho Choe, Bon Seok Koo
Surgery.2024; 175(4): 1049. CrossRef
Dynamic Changes in Treatment Response af-ter ¹³¹I in Differentiated Thyroid Cancer and Their Relationship with Recurrence Risk Stratification and TNM Staging
璐狄
Advances in Clinical Medicine.2024; 14(03): 1083. CrossRef
ASO Author Reflections: Active Surveillance may be Possible in Patients with T1b Papillary Thyroid Carcinoma Over 55 Years of Age Without High-Risk Features on Preoperative Examinations
Ho-Ryun Won, Eonju Jeon, Da Beom Heo, Jae Won Chang, Minho Shong, Je Ryong Kim, Hyemi Ko, Yea Eun Kang, Hyon-Seung Yi, Ju Hee Lee, Kyong Hye Joung, Ji Min Kim, Younju Lee, Sung-Woo Kim, Young Ju Jeong, Yong Bae Ji, Kyung Tae, Bon Seok Koo
Annals of Surgical Oncology.2023; 30(4): 2254. CrossRef
Outcomes and Trends of Treatments in High‐Risk Differentiated Thyroid Cancer
Arash Abiri, Khodayar Goshtasbi, Sina J. Torabi, Edward C. Kuan, William B. Armstrong, Tjoson Tjoa, Yarah M. Haidar
Otolaryngology–Head and Neck Surgery.2023; 168(4): 745. CrossRef
Current Controversies in Low-Risk Differentiated Thyroid Cancer: Reducing Overtreatment in an Era of Overdiagnosis
Timothy M Ullmann, Maria Papaleontiou, Julie Ann Sosa
The Journal of Clinical Endocrinology & Metabolism.2023; 108(2): 271. CrossRef
Age-Dependent Clinicopathological Characteristics of Patients with T1b Papillary Thyroid Carcinoma: Implications for the Possibility of Active Surveillance
Ho-Ryun Won, Eonju Jeon, Da Beom Heo, Jae Won Chang, Minho Shong, Je Ryong Kim, Hyemi Ko, Yea Eun Kang, Hyon-Seung Yi, Ju Hee Lee, Kyong Hye Joung, Ji Min Kim, Younju Lee, Sung-Woo Kim, Young Ju Jeong, Yong Bae Ji, Kyung Tae, Bon Seok Koo
Annals of Surgical Oncology.2023; 30(4): 2246. CrossRef
Potential impact of obesity on the aggressiveness of low- to intermediate-risk papillary thyroid carcinoma: results from a MASTER cohort study
Mijin Kim, Yae Eun Kang, Young Joo Park, Bon Seok Koo, Eu Jeong Ku, June Young Choi, Eun Kyung Lee, Bo Hyun Kim
Endocrine.2023; 82(1): 134. CrossRef
Differentiated thyroid cancer: a focus on post-operative thyroid hormone replacement and thyrotropin suppression therapy
Benjamin J. Gigliotti, Sina Jasim
Endocrine.2023; 83(2): 251. CrossRef
Thyroid stimulating hormone suppression and recurrence after thyroid lobectomy for papillary thyroid carcinoma
Mi Rye Bae, Sung Hoon Nam, Jong-Lyel Roh, Seung-Ho Choi, Soon Yuhl Nam, Sang Yoon Kim
Endocrine.2022; 75(2): 487. CrossRef
The Concept of Economic Evaluation and Its Application in Thyroid Cancer Research
Kyungsik Kim, Mijin Kim, Woojin Lim, Bo Hyun Kim, Sue K. Park
Endocrinology and Metabolism.2021; 36(4): 725. CrossRef

Clinical Study
Efficacy of Intraoperative Neuromonitoring in Reoperation for Recurrent Thyroid Cancer Patients: Jang-il Kim, Su-jin Kim, Zhen Xu, JungHak Kwak, Jong-hyuk Ahn, Hyeong Won Yu, Young Jun Chai, June Young Choi, Kyu Eun Lee; Endocrinol Metab. 2020;35(4):918-924. Published online December 23, 2020; DOI: https://doi.org/10.3803/EnM.2020.778

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Background
The use of intraoperative neuromonitoring (IONM) in thyroid surgery to preserve recurrent laryngeal nerve (RLN) function has been widely accepted. We aimed to evaluate the usefulness of IONM in reoperation for recurrent thyroid cancer patients to help identify the RLN and prevent vocal cord palsy (VCP).
Methods
We analyzed 121 consecutive patients (with IONM group, 48 patients; without IONM group, 73 patients) who underwent reoperation for recurrent thyroid cancer after total thyroidectomy from January 2009 to March 2019 in our institution without VCP due to previous operations. Data including age, sex, number of previous operations, histologic subtype of the malignancy at the initial operation, operation time, RLNs at risk, difficulty of RLN identification, surgical procedure, VCP, and other postoperative complications were reviewed. Vocal cord movement evaluations were performed preoperatively and at 2 weeks postoperatively to evaluate RLN function. In patients with VCP, additional evaluations were performed. VCP exceeding 12 months after surgery was considered permanent VCP.
Results
VCP was observed in six (12.5%) and 16 (21.9%) patients with and without IONM (P=0.189). Transient and permanent VCP were found in three (6.3%) and three (6.3%) patients with IONM (P=0.098 and P=0.982, respectively) versus in 12 (16.4%) and four (5.5%) patients without IONM.
Conclusion
The incidence of transient VCP seems to be lower in reoperations with IONM; however, there was no statistical significances. Further study will be needed to ascertain the efficacy of IONM in reoperation for recurrent thyroid cancer patients.

Citations

Citations to this article as recorded by

The learning curve for gasless transaxillary posterior endoscopic thyroidectomy for thyroid cancer: a cumulative sum analysis
Weisheng Chen, Shitong Yu, Baihui Sun, Cangui Wu, Tingting Li, Shumin Dong, Junna Ge, Shangtong Lei
Updates in Surgery.2023; 75(4): 987. CrossRef
Intraoperative neuromonitoring of the recurrent laryngeal nerve is indispensable during complete endoscopic radical resection of thyroid cancer: A retrospective study
Yang Fei, Yang Li, Feng Chen, Wen Tian
Laryngoscope Investigative Otolaryngology.2022; 7(4): 1217. CrossRef
The value of intraoperative nerve monitoring against recurrent laryngeal nerve injury in thyroid reoperations
Maowei Pei, Siqi Zhu, Chunjie Zhang, Guoliang Wang, Mingrong Hu
Medicine.2021; 100(51): e28233. CrossRef

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