Endocrinology and Metabolism

Review Articles

Thyroid
Active Surveillance for Low-Risk Thyroid Cancers: A Review of Current Practice Guidelines: Min Joo Kim, Jae Hoon Moon, Eun Kyung Lee, Young Shin Song, Kyong Yeun Jung, Ji Ye Lee, Ji-hoon Kim, Kyungsik Kim, Sue K. Park, Young Joo Park; Endocrinol Metab. 2024;39(1):47-60. Published online February 15, 2024; DOI: https://doi.org/10.3803/EnM.2024.1937

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Abstract PDF PubReader ePub: The indolent nature and favorable outcomes associated with papillary thyroid microcarcinoma have prompted numerous prospective studies on active surveillance (AS) and its adoption as an alternative to immediate surgery in managing low-risk thyroid cancer. This article reviews the current status of AS, as outlined in various international practice guidelines. AS is typically recommended for tumors that measure 1 cm or less in diameter and do not exhibit aggressive subtypes on cytology, extrathyroidal extension, lymph node metastasis, or distant metastasis. To determine the most appropriate candidates for AS, factors such as tumor size, location, multiplicity, and ultrasound findings are considered, along with patient characteristics like medical condition, age, and family history. Moreover, shared decision-making, which includes patient-reported outcomes such as quality of life and cost-effectiveness, is essential. During AS, patients undergo regular ultrasound examinations to monitor for signs of disease progression, including tumor growth, extrathyroidal extension, or lymph node metastasis. In conclusion, while AS is a feasible and reliable approach for managing lowrisk thyroid cancer, it requires careful patient selection, effective communication for shared decision-making, standardized follow-up protocols, and a clear definition of disease progression.

Thyroid
The Concept of Economic Evaluation and Its Application in Thyroid Cancer Research: Kyungsik Kim, Mijin Kim, Woojin Lim, Bo Hyun Kim, Sue K. Park; Endocrinol Metab. 2021;36(4):725-736. Published online August 27, 2021; DOI: https://doi.org/10.3803/EnM.2021.1164

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Economic evaluation is a type of comparative analysis between interventions in terms of both their resource use and health outcomes. Due to the good prognosis of thyroid cancer (TC), the socioeconomic burden of TC patients post-diagnosis is increasing. Therefore, economic evaluation studies focusing on TC are recommended. This study aimed to describe the concept and methods of economic evaluation and reviewed previous TC studies. Several previous studies compared the costs of interventions or evaluated recurrence, complications, or quality of life as measures of their effectiveness. Regarding costs, most studies focused on direct costs and applied hypothetical models. Cost-minimization analysis should be distinguished from simple cost analysis. Furthermore, due to the universality of the term “cost-effectiveness analysis” (CEA), several studies have not distinguished CEA from cost-utility analysis; this point needs to be considered in future research. Cost-benefit analyses have not been conducted in previous TC research. Since TC has a high survival rate and good prognosis, the need for economic evaluations has recently been pointed out. Therefore, correct concepts and methods are needed to obtain clear economic evaluation results. On this basis, it will be possible to provide appropriate guidelines for TC treatment and management in the future.

Citations

Citations to this article as recorded by

Cost-Utility Analysis of Early Detection with Ultrasonography of Differentiated Thyroid Cancer: A Retrospective Study on a Korean Population
Han-Sang Baek, Jeonghoon Ha, Kwangsoon Kim, Ja Seong Bae, Jeong Soo Kim, Sungju Kim, Dong-Jun Lim, Chul-Min Kim
Endocrinology and Metabolism.2024; 39(2): 310. CrossRef
Role of Prehabilitation and Rehabilitation on Functional Recovery and Quality of Life in Thyroid Cancer Patients: A Comprehensive Review
Lorenzo Lippi, Alessio Turco, Stefano Moalli, Marco Gallo, Claudio Curci, Antonio Maconi, Alessandro de Sire, Marco Invernizzi
Cancers.2023; 15(18): 4502. CrossRef
Sex-specific Associations between Body Mass Index and Thyroid Cancer Incidence among Korean Adults
Kyoung-Nam Kim, Kyungsik Kim, Sangjun Lee, Sue K. Park
Cancer Epidemiology, Biomarkers & Prevention.2023; 32(9): 1227. CrossRef
Active Surveillance Versus Immediate Surgery for Low-Risk Papillary Thyroid Microcarcinoma Patients in South Korea: A Cost-Minimization Analysis from the MAeSTro Study
Kyungsik Kim, June Young Choi, Su-jin Kim, Eun Kyung Lee, Young Ki Lee, Jun Sun Ryu, Kyu Eun Lee, Jae Hoon Moon, Young Joo Park, Sun Wook Cho, Sue K. Park
Thyroid.2022; 32(6): 648. CrossRef
A Systematic Review of Economic Evaluation of Thyroid Cancer
Mijin Kim, Woojin Lim, Kyungsik Kim, Ja Seong Bae, Byung Joo Lee, Bon Seok Koo, Eun Kyung Lee, Eu Jeong Ku, June Young Choi, Bo Hyun Kim, Sue K. Park
International Journal of Thyroidology.2022; 15(2): 74. CrossRef

Original Articles

Thyroid
Association between Iodine Intake, Thyroid Function, and Papillary Thyroid Cancer: A Case-Control Study: Kyungsik Kim, Sun Wook Cho, Young Joo Park, Kyu Eun Lee, Dong-Wook Lee, Sue K. Park; Endocrinol Metab. 2021;36(4):790-799. Published online August 11, 2021; DOI: https://doi.org/10.3803/EnM.2021.1034

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Background
This study aimed to assess the effects of iodine intake, thyroid function, and their combined effect on the risk of papillary thyroid cancer (PTC) and papillary thyroid microcarcinoma (PTMC).
Methods
A case-control study was conducted including 500 community-based controls who had undergone a health check-up, and 446 overall PTC cases (209 PTC and 237 PTMC) from the Thyroid Cancer Longitudinal Study. Urinary iodine concentration (UIC), was used as an indicator of iodine intake, and serum for thyroid function. The risk of PTC and PTMC was estimated using unconditional logistic regression.
Results
Excessive iodine intake (UIC ≥220 μg/gCr) was associated with both PTC (odds ratio [OR], 18.13 95% confidence interval [CI], 8.87 to 37.04) and PTMC (OR, 8.02; 95% CI, 4.64 to 13.87), compared to adequate iodine intake (UIC, 85 to 219 μg/gCr). Free thyroxine (T4) levels ≥1.25 ng/dL were associated with PTC (OR, 1.97; 95% CI, 1.36 to 2.87) and PTMC (OR, 2.98; 95% CI, 2.01 to 4.41), compared to free T4 levels of 0.7 to 1.24 ng/dL. Individuals with excessive iodine intake and high free T4 levels had a greatly increased OR of PTC (OR, 43.48; 95% CI, 12.63 to 149.62), and PTMC (OR, 26.96; 95% CI, 10.26 to 70.89), compared to individuals with adequate iodine intake and low free T4 levels.
Conclusion
Excessive iodine intake using creatinine-adjusted UIC and high free T4 levels may have a synergistic effect on PTC and PTMC. Considering both iodine intake and thyroid function is important to assess PTC and PTMC risk.

Citations

Citations to this article as recorded by

Association between urinary iodine concentration and the risk of papillary thyroid cancer by sex and age: a case–control study
Yerin Hwang, Hyun-Kyung Oh, Jae Hoon Chung, Sun Wook Kim, Jung-Han Kim, Jee Soo Kim, Myung-Hee Shin
Scientific Reports.2023;[Epub] CrossRef
Association between iodine nutrition and cervical lymph node metastasis of papillary thyroid microcarcinoma
Hengqiang Zhao, Jin Hu, Le Cui, Yiping Gong, Tao Huang
Frontiers in Endocrinology.2023;[Epub] CrossRef
Sex-specific Associations between Body Mass Index and Thyroid Cancer Incidence among Korean Adults
Kyoung-Nam Kim, Kyungsik Kim, Sangjun Lee, Sue K. Park
Cancer Epidemiology, Biomarkers & Prevention.2023; 32(9): 1227. CrossRef
Nomogram Model Based on Iodine Nutrition and Clinical Characteristics of Papillary Thyroid Carcinoma to Predict Lateral Lymph Node Metastasis
Junrong Wang, Yuzhang Gao, Yuxuan Zong, Weitong Gao, Xueying Wang, Ji Sun, Susheng Miao
Cancer Control.2023;[Epub] CrossRef
Content of Copper, Iron, Iodine, Rubidium, Strontium and Zinc in Thyroid Malignant Nodules and Thyroid Tissue adjacent to Nodules
Vladimir Zaichick, Qiping Dong
Journal of Clinical and Diagnostic Pathology.2022; 1(4): 7. CrossRef
Distinguish Thyroid Malignant from Benign Alterations using Trace Element Contents in Nodular Tissue determined by Neutron Activation and Inductively Coupled Plasma Mass Spectrometry
Vladimir Zaichick
Journal of Clinical and Diagnostic Pathology.2022; 1(4): 18. CrossRef
Seaweed and Iodine Intakes and SLC5A5 rs77277498 in Relation to Thyroid Cancer
Tung Hoang, Eun Kyung Lee, Jeonghee Lee, Yul Hwangbo, Jeongseon Kim
Endocrinology and Metabolism.2022; 37(3): 513. CrossRef
Iodine nutrition and papillary thyroid cancer
Xueqi Zhang, Fan Zhang, Qiuxian Li, Chuyao Feng, Weiping Teng
Frontiers in Nutrition.2022;[Epub] CrossRef
The relationship between urinary iodine concentration and papillary thyroid cancer: A systematic review and meta-analysis
Xueqi Zhang, Fan Zhang, Qiuxian Li, Renaguli Aihaiti, Chuyao Feng, Deshi Chen, Xu Zhao, Weiping Teng
Frontiers in Endocrinology.2022;[Epub] CrossRef
Screening and validation of lymph node metastasis risk-factor genes in papillary thyroid carcinoma
Qiaoyue Zhang, Jing Li, Hengyan Shen, Xinyu Bai, Tao Zhang, Ping Liu
Frontiers in Endocrinology.2022;[Epub] CrossRef
Diagnosis of Thyroid Malignancy using Levels of Chemical Element Contents in Nodular Tissue
Vladimir Zaichick
Journal of Health Care and Research.2022; 3(1): 16. CrossRef
Associations of Habitual Mineral Intake with New-Onset Prediabetes/Diabetes after Acute Pancreatitis
Claire F. Norbitt, Wandia Kimita, Juyeon Ko, Sakina H. Bharmal, Maxim S. Petrov
Nutrients.2021; 13(11): 3978. CrossRef

Clinical Study
Effects of Maternal Iodine Status during Pregnancy and Lactation on Maternal Thyroid Function and Offspring Growth and Development: A Prospective Study Protocol for the Ideal Breast Milk Cohort: Young Ah Lee, Sun Wook Cho, Ho Kyung Sung, Kyungsik Kim, Young Shin Song, Sin Je Moon, Jung Won Oh, Dal Lae Ju, Sooyeon Choi, Sang Hoon Song, Gi Jeong Cheon, Young Joo Park, Choong Ho Shin, Sue K. Park, Jong Kwan Jun, June-Key Chung; Endocrinol Metab. 2018;33(3):395-402. Published online September 18, 2018; DOI: https://doi.org/10.3803/EnM.2018.33.3.395

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Background

Iodine is an intrinsic element of thyroid hormone, which is essential for childhood growth and development. The Ideal Breast Milk (IBM) cohort study aims to evaluate the effects of maternal iodine status during pregnancy and lactation on maternal thyroid function, offspring growth and development, and offspring thyroid function.

Methods

The IBM cohort study recruited pregnant women from Seoul National University Hospital between June 2016 and August 2017, followed by enrollment of their offspring after delivery. For the maternal participants, iodine status is evaluated by urinary iodine concentration (UIC) and dietary records in the third trimester and at 3 to 4 weeks and 12 to 15 months postpartum. For the child participants, cord blood sampling and UIC measurements are performed at birth. At 3 to 4 weeks of age, UIC and breastmilk iodine concentrations are measured. At 12 to 15 months of age, growth and development are assessed and measurements of UIC, a thyroid function test, and ultrasonography are performed.

Results

A total of 198 pregnant women in their third trimester were recruited. Their mean age was 35.1±3.5 years, and 78 (39.4%) of them were pregnant with twins. Thirty-three (16.7%) of them had a previous history of thyroid disease.

Conclusion

Korea is an iodine-replete area. In particular, lactating women in Korea are commonly exposed to excess iodine due to the traditional practice of consuming brown seaweed soup postpartum. The study of the IBM cohort is expected to contribute to developing guidelines for optimal iodine nutrition in pregnant or lactating women.

Citations

Citations to this article as recorded by

High intakes of iodine among women during pregnancy and the postpartum period has no adverse effect on thyroid function
Dal Lae Ju, Sun Wook Cho, Chae Won Chung, Young Ah Lee, Gi Jeong Cheon, Young Joo Park, Choong Ho Shin, Jong Kwan Jun, June-Key Chung, Sue K. Park, YoonJu Song
European Journal of Nutrition.2023; 62(1): 239. CrossRef
Associations between maternal thyroid function in pregnancy and child neurodevelopmental outcomes at 20 months in the Seychelles Child Development Study, Nutrition Cohort 2 (SCDS NC2)
Anna M. Monaghan, Maria S. Mulhern, Emeir M. Mc Sorley, J.J. Strain, Theresa Winter, Edwin van Wijngaarden, Gary J. Myers, Philip W. Davidson, Conrad Shamlaye, Jude Gedeon, Alison J. Yeates
Journal of Nutritional Science.2021;[Epub] CrossRef

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