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Original Articles
Hypothalamus and pituitary gland
Clinical Characteristics, Diagnosis, and Treatment of Thyroid Stimulating Hormone-Secreting Pituitary Neuroendocrine Tumor (TSH PitNET): A Single-Center Experience
Jung Heo, Yeon-Lim Suh, Se Hoon Kim, Doo-Sik Kong, Do-Hyun Nam, Won-Jae Lee, Sung Tae Kim, Sang Duk Hong, Sujin Ryu, You-Bin Lee, Gyuri Kim, Sang-Man Jin, Jae Hyeon Kim, Kyu Yeon Hur
Endocrinol Metab. 2024;39(2):387-396.   Published online February 5, 2024
DOI: https://doi.org/10.3803/EnM.2023.1877
  • 846 View
  • 35 Download
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Thyroid-stimulating hormone (TSH)-secreting pituitary neuroendocrine tumor (TSH PitNET) is a rare subtype of PitNET. We investigated the comprehensive characteristics and outcomes of TSH PitNET cases from a single medical center. Also, we compared diagnostic methods to determine which showed superior sensitivity.
Methods
A total of 17 patients diagnosed with TSH PitNET after surgery between 2002 and 2022 in Samsung Medical Center was retrospectively reviewed. Data on comprehensive characteristics and treatment outcomes were collected. The sensitivities of diagnostic methods were compared.
Results
Seven were male (41%), and the median age at diagnosis was 42 years (range, 21 to 65); the median follow-up duration was 37.4 months. The most common (59%) initial presentation was hyperthyroidism-related symptoms. Hormonal co-secretion was present in four (23%) patients. Elevated serum alpha-subunit (α-SU) showed the greatest diagnostic sensitivity (91%), followed by blunted response at thyrotropin-releasing hormone (TRH) stimulation (80%) and elevated sex hormone binding globulin (63%). Fourteen (82%) patients had macroadenoma, and a specimen of one patient with heavy calcification was negative for TSH. Among 15 patients who were followed up for more than 6 months, 10 (67%) achieved hormonal and structural remission within 6 months postoperatively. A case of growth hormone (GH)/TSH/prolactin (PRL) co-secreting mixed gangliocytoma-pituitary adenoma (MGPA) was discovered.
Conclusion
The majority of the TSH PitNET cases was macroadenoma, and 23% showed hormone co-secretion. A rare case of GH/TSH/PRL co-secreting MGPA was discovered. Serum α-SU and TRH stimulation tests showed great diagnostic sensitivity. Careful consideration is needed in diagnosing TSH PitNET. Achieving remission requires complete tumor resection. In case of nonremission, radiotherapy or medical therapy can improve the long-term remission rate.
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Thyroid
Big Data Articles (National Health Insurance Service Database)
Prevalence, Treatment Status, and Comorbidities of Hyperthyroidism in Korea from 2003 to 2018: A Nationwide Population Study
Hwa Young Ahn, Sun Wook Cho, Mi Young Lee, Young Joo Park, Bon Seok Koo, Hang-Seok Chang, Ka Hee Yi
Endocrinol Metab. 2023;38(4):436-444.   Published online July 12, 2023
DOI: https://doi.org/10.3803/EnM.2023.1684
  • 1,809 View
  • 127 Download
  • 1 Web of Science
  • 3 Crossref
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
This study aimed to investigate the changes of incidence and treatment of choice for hyperthyroidism from 2003 to 2018 and explore the treatment-related complications and concomitant comorbidities in South Korea using data from the National Health Insurance Service.
Methods
This is a retrospective observational study. Hyperthyroidism was defined as a case having two or more diagnostic codes of thyrotoxicosis, with antithyroid drug intake for more than 6 months.
Results
The average age-standardized incidence of hyperthyroidism from 2003 to 2018 was 42.23 and 105.13 per 100,000 men and women, respectively. In 2003 to 2004, hyperthyroidism was most often diagnosed in patients in their 50s, but in 2017 to 2018, people were most often diagnosed in their 60s. During the entire period, about 93.7% of hyperthyroidism patients were prescribed with antithyroid drugs, and meanwhile, the annual rates of ablation therapy decrease from 7.68% in 2008 to 4.56% in 2018. Antithyroid drug-related adverse events, mainly agranulocytosis and acute hepatitis, as well as complications of hyperthyroidism such as atrial fibrillation or flutter, osteoporosis, and fractures, occurred more often in younger patients.
Conclusion
In Korea, hyperthyroidism occurred about 2.5 times more in women than in men, and antithyroid drugs were most preferred as the first-line treatment. Compared to the general population, hyperthyroid patients may have a higher risk of atrial fibrillation or flutter, osteoporosis, and fractures at a younger age.

Citations

Citations to this article as recorded by  
  • Long-term effect of thyrotropin-binding inhibitor immunoglobulin on atrial fibrillation in euthyroid patients
    Jung-Chi Hsu, Kang-Chih Fan, Ting-Chuan Wang, Shu-Lin Chuang, Ying-Ting Chao, Ting-Tse Lin, Kuan-Chih Huang, Lian-Yu Lin, Lung-Chun Lin
    Endocrine Practice.2024;[Epub]     CrossRef
  • The Current Status of Hyperthyroidism in Korea
    Hyemi Kwon
    Endocrinology and Metabolism.2023; 38(4): 392.     CrossRef
  • Is Thyroid Dysfunction Associated with Unruptured Intracranial Aneurysms? A Population-Based, Nested Case–Control Study from Korea
    Hyeree Park, Sun Wook Cho, Sung Ho Lee, Kangmin Kim, Hyun-Seung Kang, Jeong Eun Kim, Aesun Shin, Won-Sang Cho
    Thyroid®.2023; 33(12): 1483.     CrossRef
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Thyroid
The Early Changes in Thyroid-Stimulating Immunoglobulin Bioassay over Anti-Thyroid Drug Treatment Could Predict Prognosis of Graves’ Disease
Jin Yu, Han-Sang Baek, Chaiho Jeong, Kwanhoon Jo, Jeongmin Lee, Jeonghoon Ha, Min Hee Kim, Jungmin Lee, Dong-Jun Lim
Endocrinol Metab. 2023;38(3):338-346.   Published online June 9, 2023
DOI: https://doi.org/10.3803/EnM.2023.1664
  • 1,741 View
  • 102 Download
  • 1 Web of Science
  • 2 Crossref
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
To determine whether baseline thyroid-stimulating immunoglobulin (TSI) bioassay or its early response upon treatment with an anti-thyroid drug (ATD) can predict prognosis of Graves’ disease (GD) in real-world practice.
Methods
This retrospective study enrolled GD patients who had previous ATD treatment with TSI bioassay checked at baseline and at follow-up from April 2010 to November 2019 in one referral hospital. The study population were divided into two groups: patients who experienced relapse or continued ATD (relapse/persistence), and patients who experienced no relapse after ATD discontinuation (remission). The slope and area under the curve at 1st year (AUC1yr) of thyroid-stimulating hormone receptor antibodies including TSI bioassay and thyrotropin-binding inhibitory immunoglobulin (TBII) were calculated as differences between baseline and second values divided by time duration (year).
Results
Among enrolled 156 study subjects, 74 (47.4%) had relapse/persistence. Baseline TSI bioassay values did not show significant differences between the two groups. However, the relapse/persistence group showed less decremental TSI bioassay in response to ATD than the remission group (–84.7 [TSI slope, –198.2 to 8.2] vs. –120.1 [TSI slope, –204.4 to –45.9], P=0.026), whereas the TBII slope was not significantly different between the two groups. The relapse/persistence group showed higher AUC1yr of TSI bioassay and TBII in the 1st year during ATD treatment than the remission group (AUC1yr for TSI bioassay, P=0.0125; AUC1yr for TBII, P=0.001).
Conclusion
Early changes in TSI bioassay can better predict prognosis of GD than TBII. Measurement of TSI bioassay at beginning and follow-up could help predict GD prognosis.

Citations

Citations to this article as recorded by  
  • Enhanced predictive validity of integrative models for refractory hyperthyroidism considering baseline and early therapy characteristics: a prospective cohort study
    Xinpan Wang, Tiantian Li, Yue Li, Qiuyi Wang, Yun Cai, Zhixiao Wang, Yun Shi, Tao Yang, Xuqin Zheng
    Journal of Translational Medicine.2024;[Epub]     CrossRef
  • Long-term effect of thyrotropin-binding inhibitor immunoglobulin on atrial fibrillation in euthyroid patients
    Jung-Chi Hsu, Kang-Chih Fan, Ting-Chuan Wang, Shu-Lin Chuang, Ying-Ting Chao, Ting-Tse Lin, Kuan-Chih Huang, Lian-Yu Lin, Lung-Chun Lin
    Endocrine Practice.2024;[Epub]     CrossRef
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Review Article
Thyroid
Evaluation and Management of Bone Health in Patients with Thyroid Diseases: A Position Statement of the Korean Thyroid Association
A Ram Hong, Ho-Cheol Kang
Endocrinol Metab. 2023;38(2):175-189.   Published online April 27, 2023
DOI: https://doi.org/10.3803/EnM.2023.1701
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  • 248 Download
  • 2 Web of Science
  • 3 Crossref
AbstractAbstract PDFPubReader   ePub   
Thyroid hormones play an important physiological role in maintaining adult bone structure and strength. Consequently, thyroid dysfunction is related to skeletal outcomes. Overt hyperthyroidism is an established cause of high bone turnover with accelerated bone loss, leading to osteoporosis and increased fracture risk. Hyperthyroidism induced by thyroid-stimulating hormone-suppressive therapy in patients with differentiated thyroid cancer is a cause of secondary osteoporosis. In contrast, there is a lack of evidence on the negative impact of hypothyroidism on bone health. Considering the clinical updates on the importance of bone health in thyroid dysfunction, the Task Force from the Clinical Practice Guidelines Development Committee of the Korean Thyroid Association recently developed a position statement on the evaluation and management of bone health of patients with thyroid diseases, particularly focused on endogenous hyperthyroidism and thyroid-stimulating hormone-suppressive therapy-associated hyperthyroidism in patients with differentiated thyroid cancer. Herein, we review the Korean Thyroid Association’s position statement on the evaluation and management of bone health associated with thyroid diseases.

Citations

Citations to this article as recorded by  
  • Diagnosis and therapeutic approach to bone health in patients with hypopituitarism
    Justyna Kuliczkowska-Płaksej, Aleksandra Zdrojowy-Wełna, Aleksandra Jawiarczyk-Przybyłowska, Łukasz Gojny, Marek Bolanowski
    Reviews in Endocrine and Metabolic Disorders.2024;[Epub]     CrossRef
  • Osteoporosis, Osteoarthritis, and Subchondral Insufficiency Fracture: Recent Insights
    Shunichi Yokota, Hotaka Ishizu, Takuji Miyazaki, Daisuke Takahashi, Norimasa Iwasaki, Tomohiro Shimizu
    Biomedicines.2024; 12(4): 843.     CrossRef
  • Review on the protective activity of osthole against the pathogenesis of osteoporosis
    Jincai Chen, Xiaofei Liao, Juwen Gan
    Frontiers in Pharmacology.2023;[Epub]     CrossRef
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Original Articles
Thyroid
Efficacy and Safety of Long-Term Methimazole versus Radioactive Iodine in the Treatment of Toxic Multinodular Goiter
Fereidoun Azizi, Navid Saadat, Mir Alireza Takyar, Hengameh Abdi, Ladan Mehran, Atieh Amouzegar
Endocrinol Metab. 2022;37(6):861-869.   Published online November 23, 2022
DOI: https://doi.org/10.3803/EnM.2022.1476
  • 3,923 View
  • 372 Download
  • 1 Crossref
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
This study compared the degree of sustained control of hyperthyroidism in patients with toxic multinodular goiter (TMNG) treated with long-term methimazole (LT-MMI) or radioactive iodine (RAI).
Methods
In this clinical trial, 130 untreated patients with TMNG were randomized to either LT-MMI or RAI treatment. Both groups were followed for 108 to 148 months, with median follow-up durations of 120 and 132 months in the LT-MMI and RAI groups, respectively. Both groups of patients were followed every 1 to 3 months in the first year and every 6 months thereafter.
Results
After excluding patients in whom the treatment modality was changed and those who were lost to follow-up, 53 patients in the LT-MMI group and 54 in the RAI group completed the study. At the end of the study period, 50 (96%) and 25 (46%) patients were euthyroid, and two (4%) and 25 (46%) were hypothyroid in LT-MMI and RAI groups, respectively. In the RAI group, four (8%) patients had subclinical hyperthyroidism. The mean time to euthyroidism was 4.3±1.3 months in LT-MMI patients and 16.3± 15.0 months in RAI recipients (P<0.001). Patients treated with LT-MMI spent 95.8%±5.9% of the 12-year study period in a euthyroid state, whereas this proportion was 72.4%±14.8% in the RAI-treated patients (P<0.001). No major treatment-related adverse events were observed in either group.
Conclusion
In patients with TMNG, LT-MMI therapy is superior to RAI treatment, as shown by the earlier achievement of euthyroidism and the longer duration of sustained normal serum thyrotropin.

Citations

Citations to this article as recorded by  
  • Mechanism of Huatan Sanjie Fang in improving goiter in Graves' disease mice based on the Hippo signaling pathway
    Huimin Yuan, Wenxin Ma, Yifei Song, Hang Wang, Shuxin Yan, Silan Hao, Xiaoyun Zhu, Yang Tang
    Journal of Traditional Chinese Medical Sciences.2023; 10(3): 289.     CrossRef
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Thyroid
Clinical Outcomes of Repeated Radioactive Iodine Therapy for Graves’ Disease
Min Joo Kim, Sun Wook Cho, Ye An Kim, Hoon Sung Choi, Young Joo Park, Do Joon Park, Bo Youn Cho
Endocrinol Metab. 2022;37(3):524-532.   Published online June 16, 2022
DOI: https://doi.org/10.3803/EnM.2022.1418
  • 4,846 View
  • 230 Download
  • 2 Web of Science
  • 2 Crossref
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Radioactive iodine (RAI) therapy is a successful therapeutic modality for Graves’ disease. However, RAI therapy can fail, and RAI therapy after antithyroid drugs (ATDs) has a lower remission rate. Therefore, many patients require repeated RAI therapy. This study investigated the clinical outcomes of repeated RAI therapy for Graves’ disease.
Methods
Patients who underwent RAI therapy as second-line therapy after failure of ATD treatment between 2001 and 2015 were reviewed. Remission was defined as hypothyroid or euthyroid status without ATD, and with or without levothyroxine at 12 months after RAI therapy.
Results
The 1-year remission rate after 2nd RAI therapy (66%, 152/230) is significantly higher than that after 1st RAI therapy (48%, 393/815) or long-term ATD treatment after 1st RAI therapy failure (42%). The clinical response to 2nd RAI therapy was more rapid. The median time intervals from the 2nd RAI therapy to ATD discontinuation (1.3 months) and to the start of levothyroxine replacement (2.5 months) were significantly shorter than those for the 1st RAI therapy. A smaller goiter size, a longer time interval between the 1st and 2nd RAI therapies, and a longer ATD discontinuation period predicted remission after the 2nd RAI therapy. Finally, in 78 patients who failed the 2nd RAI therapy, the mean ATD dosage significantly reduced 5.1 mg over 12 months.
Conclusion
Repeated RAI therapy can be a good therapeutic option, especially in patients with smaller goiters and those who are more responsive to the 1st RAI therapy.

Citations

Citations to this article as recorded by  
  • The Early Changes in Thyroid-Stimulating Immunoglobulin Bioassay over Anti-Thyroid Drug Treatment Could Predict Prognosis of Graves’ Disease
    Jin Yu, Han-Sang Baek, Chaiho Jeong, Kwanhoon Jo, Jeongmin Lee, Jeonghoon Ha, Min Hee Kim, Jungmin Lee, Dong-Jun Lim
    Endocrinology and Metabolism.2023; 38(3): 338.     CrossRef
  • Effect of liver dysfunction on outcome of radioactive iodine therapy for Graves’ disease
    Yuyang Ze, Fei Shao, Xuefeng Feng, Shanmei Shen, Yan Bi, Dalong Zhu, Xiaowen Zhang
    BMC Endocrine Disorders.2022;[Epub]     CrossRef
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Thyroid
Big Data Articles (National Health Insurance Service Database)
Risk of Diabetes in Patients with Long-Standing Graves’ Disease: A Longitudinal Study
Eyun Song, Min Ji Koo, Eunjin Noh, Soon Young Hwang, Min Jeong Park, Jung A Kim, Eun Roh, Kyung Mook Choi, Sei Hyun Baik, Geum Joon Cho, Hye Jin Yoo
Endocrinol Metab. 2021;36(6):1277-1286.   Published online December 16, 2021
DOI: https://doi.org/10.3803/EnM.2021.1251
  • 5,181 View
  • 181 Download
  • 9 Web of Science
  • 10 Crossref
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
The detrimental effects of excessive thyroid hormone on glucose metabolism have been widely investigated. However, the risk of diabetes in patients with long-standing hyperthyroidism, especially according to treatment modality, remains uncertain, with few longitudinal studies.
Methods
The risk of diabetes in patients with Graves’ disease treated with antithyroid drugs (ATDs) for longer than the conventional duration (≥2 years) was compared with that in age-and sex-matched controls. The risk was further compared according to subsequent treatment modalities after a 24-month course of ATD: continuation of ATD (ATD group) vs. radioactive iodine ablation (RIA) group.
Results
A total of 4,593 patients were included. Diabetes was diagnosed in 751 (16.3%) patients over a follow-up of 7.3 years. The hazard ratio (HR) for diabetes, after adjusting for various known risk factors, was 1.18 (95% confidence interval [CI], 1.10 to 1.28) in patients with hyperthyroidism. Among the treatment modality groups, the RIA group (n=102) had a higher risk of diabetes than the ATD group (n=4,491) with HR of 1.56 (95% CI, 1.01 to 2.42). Further, the risk of diabetes increased with an increase in the ATD treatment duration (P for trend=0.019).
Conclusion
The risk of diabetes was significantly higher in patients with long-standing Graves’ disease than in the general population, especially in patients who underwent RIA and prolonged ATD treatment. Special attention to hyperglycemia during follow-up along with effective control of hyperthyroidism may be necessary to reduce the risk of diabetes in these patients.

Citations

Citations to this article as recorded by  
  • Safety of non-standard regimen of systemic steroid therapy in patients with Graves’ orbitopathy: a single-centre experience
    Nadia Sawicka-Gutaj, Dawid Gruszczyński, Natalia Zawalna, Kacper Nijakowski, Agnieszka Skiba, Mateusz Pochylski, Jerzy Sowiński, Marek Ruchała
    Pharmacological Reports.2024; 76(1): 185.     CrossRef
  • Increased risk of diabetes mellitus and hyperlipidemia in patients with differentiated thyroid cancer
    Hwa Young Ahn, Jooyoung Lee, Jinmo Kang, Eun Kyung Lee
    European Journal of Endocrinology.2024; 190(3): 248.     CrossRef
  • Prevalencia de diabetes en personas con disfunción tiroidea
    Juan J. Díez, Pedro Iglesias
    Medicina Clínica.2023; 160(8): 333.     CrossRef
  • Control of Thyroid Dysfunction in Spanish Population Registered in the Primary Care Clinical Database: An Analysis of the Proportion of Patients with Thyrotropin Values Outside the Reference Range
    Juan J. Díez, Pedro Iglesias
    Hormone and Metabolic Research.2023; 55(03): 184.     CrossRef
  • Prevalence of thyroid dysfunction and its relationship to income level and employment status: a nationwide population-based study in Spain
    Juan J. Díez, Pedro Iglesias
    Hormones.2023; 22(2): 243.     CrossRef
  • Prevalence of diabetes in people with thyroid dysfunction
    Juan J. Díez, Pedro Iglesias
    Medicina Clínica (English Edition).2023; 160(8): 333.     CrossRef
  • Diabetes Mellitus Secondary to Endocrine Diseases: An Update of Diagnostic and Treatment Particularities
    Mihaela Simona Popoviciu, Lorena Paduraru, Raluca Marinela Nutas, Alexandra Maria Ujoc, Galal Yahya, Kamel Metwally, Simona Cavalu
    International Journal of Molecular Sciences.2023; 24(16): 12676.     CrossRef
  • Thyroid Eye Disease and Its Association With Diabetes Mellitus: A Major Review
    Roshmi Gupta, Pramila Kalra, Lakshmi B. Ramamurthy, Suryasnata Rath
    Ophthalmic Plastic & Reconstructive Surgery.2023; 39(6S): S51.     CrossRef
  • Metabolite Changes during the Transition from Hyperthyroidism to Euthyroidism in Patients with Graves’ Disease
    Ho Yeop Lee, Byeong Chang Sim, Ha Thi Nga, Ji Sun Moon, Jingwen Tian, Nguyen Thi Linh, Sang Hyeon Ju, Dong Wook Choi, Daiki Setoyama, Hyon-Seung Yi
    Endocrinology and Metabolism.2022; 37(6): 891.     CrossRef
  • Diabetes and Hyperthyroidism: Is There a Causal Link?
    Sang Yong Kim
    Endocrinology and Metabolism.2021; 36(6): 1175.     CrossRef
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Brief Report
Thyroid
Outcomes and Predictors of 30-Day Readmissions for Hyperthyroidism: A Nationwide Study
Michael Salim, Zain El-amir, Asim Kichloo, Farah Wani, Ehizogie Edigin, Hafeez Shaka
Endocrinol Metab. 2021;36(6):1307-1311.   Published online December 1, 2021
DOI: https://doi.org/10.3803/EnM.2021.1190
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AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Hyperthyroidism is associated with an elevated risk of cardiovascular events and worse hospital outcomes. The Nationwide Readmissions Database (NRD) 2018 was used to determine the characteristics of 30-day readmission in patients with hyperthyroidism. The 30-day all-cause readmission rate for hyperthyroidism was 10.3%. About 21.7% had hyperthyroidism as the principal diagnosis on readmission. Readmissions were associated with an increased odds of inpatient mortality (odds ratio, 7.04; 95% confidence interval [CI], 3.97 to 12.49), length of stay (5.2 days vs. 4.0 days; 95% CI, 0.7 to 1.8), total hospital charges, and cost of hospitalizations. Independent predictors of 30-day all-cause readmissions included Charlson Comorbidity Index ≥3 (adjusted hazard ratio [aHR], 1.76; 95% CI, 1.15 to 2.71), discharge against medical advice (aHR, 2.30; 95% CI, 1.50 to 3.53), protein-energy malnutrition (aHR, 1.54; 95% CI, 1.15 to 2.07), and atrial fibrillation (aHR, 1.41; 95% CI, 1.11 to 1.79). Aggressive but appropriate monitoring is warranted in patients with hyperthyroidism to prevent readmissions.
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Original Articles
Clinical Study
The Association of Overt and Subclinical Hyperthyroidism with the Risk of Cardiovascular Events and Cardiovascular Mortality: Meta-Analysis and Systematic Review of Cohort Studies
Seo Young Sohn, Eunyoung Lee, Min Kyung Lee, Jae Hyuk Lee
Endocrinol Metab. 2020;35(4):786-800.   Published online November 25, 2020
DOI: https://doi.org/10.3803/EnM.2020.728
  • 6,045 View
  • 288 Download
  • 20 Web of Science
  • 22 Crossref
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Whether hyperthyroidism is an independent risk factor for cardiovascular events remains controversial. We aimed to evaluate the association of overt and subclinical hyperthyroidism with the risk of ischemic heart disease (IHD), stroke, heart failure, and cardiovascular mortality.
Methods
Studies regarding the association between hyperthyroidism and cardiovascular events were searched on PubMed and Embase databases. The cardiovascular disease (CVD) risk was classified as high and low, based on pre-existing diseases, including history of coronary, cerebral, or peripheral artery disease; heart failure; atrial fibrillation; diabetes mellitus; or chronic kidney disease.
Results
Thirty-seven cohort studies were included in this meta-analysis. The pooled hazard ratio for subjects with overt hyperthyroidism compared with the control group was 1.11 (95% confidence interval [CI], 1.03 to 1.19) for IHD, 1.35 (95% CI, 1.03 to 1.75) for stroke, and 1.20 (95% CI, 1.00 to 1.46) for cardiovascular mortality. For subjects with subclinical hyperthyroidism, the pooled hazard ratio was 1.24 (95% CI, 1.07 to 1.45) for IHD, when compared with the control group. Subgroup analysis by CVD risk showed that the risk of stroke in overt hyperthyroidism was increased in the low CVD risk group; however, these association was not observed in the high CVD risk group. Similarly, the risk of IHD in subjects with subclinical hyperthyroidism was significantly increased in the low CVD risk group.
Conclusion
Overt hyperthyroidism is associated with increased risk of IHD, stroke, and cardiovascular mortality, and subclinical hyperthyroidism is associated with increased risk of IHD. These associations were particularly observed in the low risk CVD group without underlying CVD.

Citations

Citations to this article as recorded by  
  • Trends in Prevalence of Thyroid Dysfunction and its Associations With Mortality Among US Participants, 1988-2012
    Xiaowen Zhang, Yong Wang, Hongwei Wang, Xinlin Zhang
    The Journal of Clinical Endocrinology & Metabolism.2024; 109(2): e657.     CrossRef
  • Adequacy of thyroid hormone replacement for people with hypothyroidism in real‐world settings: A systematic review and meta‐analysis of observational studies
    Agathoklis Efthymiadis, Matthew Henry, Dimitrios Spinos, Marianthi Bourlaki, Alexandros Tsikopoulos, Angeliki Bourazana, Anastasios Bastounis, Konstantinos Tsikopoulos
    Clinical Endocrinology.2024; 100(5): 488.     CrossRef
  • Thyroid Disorders and Peripheral Arterial Disease
    Katica Bajuk Studen, Simona Gaberscek, Katja Zaletel, Ales Blinc, Miso Sabovic, Gerit-Holger Schernthaner, Panagiotis Anagnostis, Pier Luigi Antignani, Mojca Jensterle, Dimitri P Mikhailidis, Pavel Poredos
    Current Vascular Pharmacology.2024; 22(1): 36.     CrossRef
  • Higher Risk of Incident Hyperthyroidism in Patients With Atrial Fibrillation
    Pang-Shuo Huang, Jen-Fang Cheng, Jien-Jiun Chen, Yi-Chih Wang, Juey-Jen Hwang, Cho-Kai Wu, Chia-Ti Tsai
    The Journal of Clinical Endocrinology & Metabolism.2023; 109(1): 92.     CrossRef
  • Eurasian clinical guidelines for the diagnosis and treatment of secondary (symptomatic) forms of arterial hypertension (2022)
    I. E. Chazova, N. M. Chikhladze, N. V. Blinova, Zh. E. Belaya, N. M. Danilov, E. M. Elfimova, A. Yu. Litvin, L. Ya. Rozhinskaya, N. Yu. Sviridenko, M. Yu. Shvetsov, V. A. Azizov, E. A. Grigorenko, N. P. Mit’kovskaja, I. I. Mustafaev, A. G. Polupanov, A. S
    Eurasian heart journal.2023; (1): 6.     CrossRef
  • Sympathetic Activation Promotes Cardiomyocyte Apoptosis in a Rabbit Susceptibility Model of Hyperthyroidism-Induced Atrial Fibrillation via the p38 MAPK Signaling Pathway
    Jialin Zheng, Shijian Zhao, Qishi Yang, Yantao Wei, Jianmei Li, Tao Guo
    Critical Reviews in Eukaryotic Gene Expression.2023; 33(5): 17.     CrossRef
  • Cardiovascular outcomes in subclinical thyroid disease: an update
    Matthew D. Ettleson
    Current Opinion in Endocrinology, Diabetes & Obesity.2023; 30(5): 218.     CrossRef
  • Lower free triiodothyronine levels are associated with higher all-cause and cardiovascular mortality in people with diabetes-NHANES 2007–2012
    Chang Liu, Zhong Xin, Lin Hua
    Diabetes Research and Clinical Practice.2023; 202: 110811.     CrossRef
  • Hyperthyroidism
    Sun Y. Lee, Elizabeth N. Pearce
    JAMA.2023; 330(15): 1472.     CrossRef
  • Is Thyroid Dysfunction Associated with Unruptured Intracranial Aneurysms? A Population-Based, Nested Case–Control Study from Korea
    Hyeree Park, Sun Wook Cho, Sung Ho Lee, Kangmin Kim, Hyun-Seung Kang, Jeong Eun Kim, Aesun Shin, Won-Sang Cho
    Thyroid®.2023; 33(12): 1483.     CrossRef
  • Risks of suboptimal and excessive thyroid hormone replacement across ages
    U. Feldt-Rasmussen, G. Effraimidis, S. Bliddal, M. Klose
    Journal of Endocrinological Investigation.2023; 47(5): 1083.     CrossRef
  • Association of Mild Thyroid Dysfunction and Adverse Prognosis Among Chinese Patients With Acute ST Segment Elevation Myocardial Infarction
    Mei-Fang Li, Ze-Tao Wei, Shuai Li, Qi-Ming Feng, Jing-Bo Li
    Frontiers in Endocrinology.2022;[Epub]     CrossRef
  • The Cardiovascular Effects of Subclinical Hyperthyroidism following Percutaneous Coronary Intervention
    Ricardo Correa, Ricardo Villela
    Clinical Thyroidology.2022; 34(6): 240.     CrossRef
  • Weight Gain and Body Composition Changes during the Transition of Thyroid Function in Patients with Graves’ Disease Undergoing Radioiodine Treatment
    Zhenqin Cai, Qiyu Chen, Yan Ling, Henrik Falhammar
    International Journal of Endocrinology.2022; 2022: 1.     CrossRef
  • Minor perturbations of thyroid homeostasis and major cardiovascular endpoints—Physiological mechanisms and clinical evidence
    Patrick Müller, Melvin Khee-Shing Leow, Johannes W. Dietrich
    Frontiers in Cardiovascular Medicine.2022;[Epub]     CrossRef
  • Role of thyroid hormones-induced oxidative stress on cardiovascular physiology
    María Laura Barreiro Arcos
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Atrial Fibrillation in Patients with Hyperthyroidism.
Ju Yong Lee, Chang Ho Song, Byeung Su Yu, Choon Hee Chung, Yoon Sok Chung, Hyeon Man Kim
J Korean Endocr Soc. 1995;10(1):52-57.   Published online November 6, 2019
  • 1,216 View
  • 47 Download
AbstractAbstract PDF
Hyperthyroidism is a well known cause of atrial fibrillation. It is also known that control of hyperthyroidism can usually curb thyrotoxic atrial fibrillation and restore sinus rhythm. In this study, 282 patients with hyperthyroidism were investigated to quantify the incidence of atrial fibrillation, and to identify the vulnerable groups. In addition, we compared two groups of subjects with atrial fibrillation-one group with hyperthyroidism and the other group without - to study their reversion rate to sinus rhythm. Lastly, we investigated the factors affecting reversion to sinus rhythm in patients with thyrotoxic atrial fibrillation.The results were follows;1) Among 282 patients with hyperthyroidism, 35 cases(12.4%) had atrial fibrillation. Atrial fibrillations were more prevalent among male patient(19.4%) and elderly patients(42.9%) than female patients(10.0%) and young patients(10.0%).2) Reversion to normal sinus rhythm in patients with thyrotoxic atrial fibrillation(39.3%) was significantly higher than that in patients without hyperthyroidism(17.4%, p<0.001).3) Reversion to normal sinus rhythm was achieved within 28 weeks from the beginnig of antithyroid treatment in patients with thyrotoxic atrial fibrillation. Although there were no significant differences in mean age, sex ratio, and initial and follow-up thyroid hormone levels between the reversion group and non-reversion group, associated heart diseases were more prevalent in the latter group(18.2% vs. 47.1%).It can be concluded that thyrotoxic atrial fibrillations were more common in male patient and elderly patient groups, and could be frequently reverted to normal sinus rhythm by antithyroid treatment. We also suggest that the duration of artrial fibrillation(from intial onset of the condition), and associated heart diseases, may be important predictive factors for the reversion of atrial fibrillation in patients with hyperthyroidism.
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Review Articles
Thyroid
Digital Medicine in Thyroidology: A New Era of Managing Thyroid Disease
Jae Hoon Moon, Steven R. Steinhubl
Endocrinol Metab. 2019;34(2):124-131.   Published online June 24, 2019
DOI: https://doi.org/10.3803/EnM.2019.34.2.124
  • 5,402 View
  • 135 Download
  • 8 Web of Science
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AbstractAbstract PDFPubReader   ePub   

Digital medicine has the capacity to affect all aspects of medicine, including disease prediction, prevention, diagnosis, treatment, and post-treatment management. In the field of thyroidology, researchers are also investigating potential applications of digital technology for the thyroid disease. Recent studies using artificial intelligence (AI)/machine learning (ML) have reported reasonable performance for the classification of thyroid nodules based on ultrasonographic (US) images. AI/ML-based methods have also shown good diagnostic accuracy for distinguishing between benign and malignant thyroid lesions based on cytopathologic findings. Assistance from AI/ML methods could overcome the limitations of conventional thyroid US and fine-needle aspiration cytology. A web-based database has been developed for thyroid cancer care. In addition to its role as a nationwide registry of thyroid cancer, it is expected to serve as a clinical platform to facilitate better thyroid cancer care and as a research platform providing comprehensive disease-specific big data. Evidence has been found that biosignal monitoring with wearable devices may predict thyroid dysfunction. This real-world thyroid function monitoring could aid in the management and early detection of thyroid dysfunction. In the thyroidology field, research involving the range of digital medicine technologies and their clinical applications is expected to be even more active in the future.

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Thyroid
Graves' Disease: Can It Be Cured?
Wilmar M. Wiersinga
Endocrinol Metab. 2019;34(1):29-38.   Published online March 21, 2019
DOI: https://doi.org/10.3803/EnM.2019.34.1.29
  • 16,157 View
  • 511 Download
  • 44 Web of Science
  • 46 Crossref
AbstractAbstract PDFPubReader   ePub   

Whether or not Graves' hyperthyroidism can be really cured, depends on the definition of “cure.” If eradication of thyroid hormone excess suffices for the label “cure,” then all patients can be cured because total thyroidectomy or high doses of 131I will abolish hyperthyroidism albeit at the expense of creating another disease (hypothyroidism) requiring lifelong medication with levothyroxine. I would not call this a “cure,” which I would like to define as a state with stable thyroid stimulating hormone (TSH), free thyroxine, and triiodothyronine serum concentrations in the normal range in the absence of any thyroid medication. Surgery and radioiodine are unlikely to result in so-defined cures, as their preferable aim as stated in guidelines is to cause permanent hypothyroidism. Discontinuation of antithyroid drugs is followed by 50% recurrences within 4 years; before starting therapy the risk of recurrences can be estimated with the Graves' Recurrent Events After Therapy (GREAT) score. At 20-year follow-up about 62% had developed recurrent hyperthyroidism, 8% had subclinical hypothyroidism, and 3% overt hypothyroidism related to TSH receptor blocking antibodies and thyroid peroxidase antibodies. Only 27% was in remission, and might be considered cured. If the definition of “cure” would also include the disappearance of thyroid antibodies in serum, the proportion of cured patients would become even lower.

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Close layer
Original Articles
Thyroid
Prevalence and Annual Incidence of Thyroid Disease in Korea from 2006 to 2015: A Nationwide Population-Based Cohort Study
Hyemi Kwon, Jin-hyung Jung, Kyung-Do Han, Yong-Gyu Park, Jung-Hwan Cho, Da Young Lee, Ji Min Han, Se Eun Park, Eun-Jung Rhee, Won-Young Lee
Endocrinol Metab. 2018;33(2):260-267.   Published online June 21, 2018
DOI: https://doi.org/10.3803/EnM.2018.33.2.260
  • 6,408 View
  • 128 Download
  • 37 Web of Science
  • 37 Crossref
AbstractAbstract PDFPubReader   ePub   
Background

The incidence of thyroid nodules has increased worldwide in recent years. Thyroid dysfunction is a potential risk factor for hypercholesterolemia, cardiovascular disease, osteoporosis, arrhythmia, and neuropsychiatric disease. This study investigated the prevalence and annual incidence of thyroid nodules, hypothyroidism, and hyperthyroidism in Koreans.

Methods

In this nationwide population-based cohort study, 51,834,660 subjects were included using the National Health Information database from 2006 to 2015, after the exclusion of subjects with thyroid cancer.

Results

The prevalence in Korea in 2015 of thyroid nodules, hypothyroidism in patients taking thyroid hormone, and hyperthyroidism in patients undergoing treatment was 15.82/1,000 population, 15.94/1,000 population, and 2.76/1,000 population, respectively. All these diseases were more prevalent among women than among men. The number of incident cases of these three thyroid diseases steadily increased from 2006 to 2012, and then decreased through 2015. The incidence of thyroid nodules, hypothyroidism treated with thyroid hormone, and treated hyperthyroidism was 6.79/1,000 population, 1.76/1,000 population, and 0.55/1,000 population, respectively, in Korea in 2015. The use of methimazole continuously increased, from 33% of total antithyroid drug prescriptions in 2006 to 74.4% in 2015, and it became the most frequently prescribed antithyroid drug in Korea. In contrast, the use of propylthiouracil continuously decreased.

Conclusion

This was the first nationwide study of the prevalence and annual incidence of thyroid nodules, hypothyroidism, and hyperthyroidism to take into account recent changes and to include the current status of patients receiving treatment.

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Close layer
Thyroid
Validity and Reliability of the Korean Version of the Hyperthyroidism Symptom Scale
Jie-Eun Lee, Dong Hwa Lee, Tae Jung Oh, Kyoung Min Kim, Sung Hee Choi, Soo Lim, Young Joo Park, Do Joon Park, Hak Chul Jang, Jae Hoon Moon
Endocrinol Metab. 2018;33(1):70-78.   Published online March 21, 2018
DOI: https://doi.org/10.3803/EnM.2018.33.1.70
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AbstractAbstract PDFPubReader   ePub   
Background

Thyrotoxicosis is a common disease resulting from an excess of thyroid hormones, which affects many organ systems. The clinical symptoms and signs are relatively nonspecific and can vary depending on age, sex, comorbidities, and the duration and cause of the disease. Several symptom rating scales have been developed in an attempt to assess these symptoms objectively and have been applied to diagnosis or to evaluation of the response to treatment. The aim of this study was to assess the reliability and validity of the Korean version of the hyperthyroidism symptom scale (K-HSS).

Methods

Twenty-eight thyrotoxic patients and 10 healthy subjects completed the K-HSS at baseline and after follow-up at Seoul National University Bundang Hospital. The correlation between K-HSS scores and thyroid function was analyzed. K-HSS scores were compared between baseline and follow-up in patient and control groups. Cronbach's α coefficient was calculated to demonstrate the internal consistency of K-HSS.

Results

The mean age of the participants was 34.7±9.8 years and 13 (34.2%) were men. K-HSS scores demonstrated a significant positive correlation with serum free thyroxine concentration and decreased significantly with improved thyroid function. K-HSS scores were highest in subclinically thyrotoxic subjects, lower in patients who were euthyroid after treatment, and lowest in the control group at follow-up, but these differences were not significant. Cronbach's α coefficient for the K-HSS was 0.86.

Conclusion

The K-HSS is a reliable and valid instrument for evaluating symptoms of thyrotoxicosis in Korean patients.

Citations

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Close layer
Thyroid Stimulating Hormone Reference Range and Prevalence of Thyroid Dysfunction in the Korean Population: Korea National Health and Nutrition Examination Survey 2013 to 2015
Won Gu Kim, Won Bae Kim, Gyeongji Woo, Hyejin Kim, Yumi Cho, Tae Yong Kim, Sun Wook Kim, Myung-Hee Shin, Jin Woo Park, Hai-Lin Park, Kyungwon Oh, Jae Hoon Chung
Endocrinol Metab. 2017;32(1):106-114.   Published online January 23, 2017
DOI: https://doi.org/10.3803/EnM.2017.32.1.106
Correction in: Endocrinol Metab 2023;38(3):357
  • 7,987 View
  • 202 Download
  • 73 Web of Science
  • 79 Crossref
AbstractAbstract PDFPubReader   
Background

No nationwide epidemiological study evaluating the prevalence of subclinical and overt forms of hypothyroidism and hyperthyroidism has yet been conducted in Korea. This study aimed to evaluate the reference range of serum thyroid stimulating hormone (TSH) and the national prevalence of thyroid dysfunctions in Korea.

Methods

Nation-wide cross-sectional data were analyzed from a representative sample of the civilian, non-institutionalized Korean population (n=6,564) who underwent blood testing for thyroid function and anti-thyroid peroxidase antibody (TPOAb) as part of the Korea National Health and Nutrition Examination Survey VI (2013 to 2015).

Results

The reference interval of serum TSH in the Korean reference population was 0.62 to 6.68 mIU/L. Based on this reference interval, the prevalence of overt and subclinical hypothyroidism was 0.73% (males 0.40%, females 1.10%) and 3.10% (males 2.26%, females 4.04%), respectively. The prevalence of hypothyroidism increased with age until the age group between 50 to 59 years. Positive TPOAb were found in 7.30% of subjects (males 4.33%, females 10.62%). The prevalence of overt and subclinical hypothyroidism TPOAb-positive subjects was 5.16% and 10.88%, respectively. The prevalence of overt and subclinical hyperthyroidism was 0.54% (males 0.30%, females 0.81%) and 2.98% (males 2.43%, females, 3.59%), respectively.

Conclusion

The Serum TSH reference levels in the Korean population were higher than the corresponding levels in Western countries. Differences were found in the prevalence of hypothyroidism and hyperthyroidism according to age, sex, and TPOAb positivity. This study provides important baseline information for understanding patterns of thyroid dysfunction and diseases in Korea.

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