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36 "Sun Wook Kim"
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Original Articles
Medullary Thyroid Carcinoma Detected by Routine Health Screening Had Better Clinical Outcome and Survival
Ji Hyun Yoo, Da Eun Leem, Bo Ram Kim, Tae Hyuk Kim, Sun Wook Kim, Jae Hoon Chung
Received October 22, 2024  Accepted January 8, 2025  Published online March 5, 2025  
DOI: https://doi.org/10.3803/EnM.2024.2214    [Epub ahead of print]
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AbstractAbstract PDF
Background
The benefits of early detection in medullary thyroid carcinoma (MTC) are not well established. This study investigates the impact of early detection of MTC on clinical outcomes.
Methods
This retrospective study evaluated 144 patients diagnosed with MTC at Samsung Medical Center between 1995 and 2019, classified as asymptomatic (mostly detected through routine health check-ups, including ultrasonography, calcitonin, or carcinoembryonic antigen levels) and symptomatic. Initial treatment response, final clinical outcomes, and cancer-specific survival were compared.
Results
MTC was diagnosed in 104 (72.2%) asymptomatic and 40 (27.8%) symptomatic patients. The symptomatic group showed a significantly larger primary tumor size, more frequent lateral neck lymph node metastasis, more advanced tumor, node, metastasis (TNM) staging, and higher pre- and postoperative serum calcitonin levels. For initial treatment response, the proportion of excellent responders was significantly higher in the asymptomatic group (71.2% vs. 40.0%), while that of patients with biochemical incomplete response (37.5% vs. 26.9%) and structural incomplete response (22.5% vs. 1.9%) was significantly higher in the symptomatic group (all P<0.001). For the final clinical outcomes, the rate of patients with no evidence of disease was higher in the asymptomatic group (67.3% vs. 30.0%), while the rate of patients with structurally identifiable disease was higher in the symptomatic group (45.0% vs. 7.7%) (P<0.001 for both). The symptomatic group had significantly poorer cancer-specific survival than the asymptomatic group (log-rank P=0.023).
Conclusion
Compared with late diagnosis through symptomatic presentation, early diagnosis in asymptomatic patients results in significantly better initial treatment response, final clinical outcomes, and cancer-specific survival in patients with MTC.
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Prognostic Impact of Primary Tumor Size in Papillary Thyroid Carcinoma without Lymph Node Metastasis
Chae A Kim, Hye In Kim, Na Hyun Kim, Tae Yong Kim, Won Bae Kim, Jae Hoon Chung, Min Ji Jeon, Tae Hyuk Kim, Sun Wook Kim, Won Gu Kim
Received October 2, 2024  Accepted January 2, 2025  Published online February 25, 2025  
DOI: https://doi.org/10.3803/EnM.2024.2199    [Epub ahead of print]
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AbstractAbstract PDFPubReader   ePub   
Background
We aimed to investigate the prognostic significance of primary tumor size in patients with pT1–T3a N0 M0 papillary thyroid carcinoma (PTC), minimizing the impact of confounding factors.
Methods
A multicenter retrospective study included 5,759 patients with PTC. Those with lymph node metastasis, gross extrathyroidal extension (ETE), and aggressive variants were excluded. Patients were categorized by primary tumor size (≤1, 1.1–2, 2.1–4, and >4 cm) and subdivided based on the presence of microscopic ETE (mETE).
Results
The median age was 48.0 years, and 87.5% were female. The median primary tumor size was 0.7 cm, with mETE identified in 43.7%. The median follow-up was 8.0 years, with an overall recurrent/persistent disease rate of 2.8%. Multivariate analysis identified male sex, larger tumor size, and the presence of mETE as significant prognostic risk factors. The 10-year recurrent/persistent disease rates for tumors ≤1, 1.1–2, 2.1–4, and >4 cm were 2.5%, 4.7%, 11.1%, and 6.0%, respectively. The 2.1–4 cm group had a significantly higher hazard ratio (HR), with the >4 cm group had the highest HR than the ≤1 cm group. Patients with mETE had a higher recurrent/persistent disease rate (4.5%) than those without, with rates by tumor size being 2.6%, 5.6%, 16.7%, and 8.2%.
Conclusion
Larger tumor size and the presence of mETE significantly increased the risk of recurrent/persistent disease in PTC. Patients with pT2–T3a N0 M0 PTC (>2 cm) had a recurrent/persistent disease risk exceeding 5%, warranting vigilant management.
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Thyroid
Triiodothyronine Is Associated with Incidence/Resolution of Steatotic Liver Disease: Longitudinal Study in Euthyroid Korean
Hye In Kim, Jun Young Kim, Jung Hwan Cho, Ji Min Han, Sunghwan Suh, Ji Cheol Bae, Tae Hyuk Kim, Sun Wook Kim, Jong Ryeal Hahm, Jae Hoon Chung
Endocrinol Metab. 2025;40(1):135-145.   Published online December 4, 2024
DOI: https://doi.org/10.3803/EnM.2024.2040
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AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
The positive relationship between triiodothyronine (T3) and steatotic liver disease (SLD) demonstrated only in crosssectional study. We aimed to evaluated whether total T3 (TT3) is associated with the development/resolution of SLD in longitudinal design.
Methods
This retrospective, longitudinal, population-based cohort study included 1,665 South Korean euthyroid adults with ≥4 thyroid function test. We explored the impact of mean TT3 during follow-up on development/resolution of either SLD (diagnosed by ultrasound) or modified metabolic dysfunction-associated steatotic liver disease (MASLD) using Cox proportional hazards regression models.
Results
During about median 5 years follow-up, 807/1,216 (66.3%) participants among participants without SLD at baseline developed SLD, and 253/318 (79.5%) participants among participants with SLD at baseline SLD resolved fatty liver. Mean TT3 rather than thyroid stimulating hormone or mean free thyroxine was significantly related with development (adjusted hazard ratio [HR], 1.01; 95% confidence interval [CI], 1.00 to 1.02; P=0.002) and resolution (adjusted HR, 0.97; 95% CI, 0.96 to 0.99; P=0.005) of SLD. Compared with low mean TT3 group, high mean TT3 group was positively associated with development of SLD (adjusted HR, 1.20; 95% CI, 1.05 to 1.38; P=0.008) and inversely associated with resolution of SLD (adjusted HR, 0.66; 95% CI, 0.51 to 0.85; P=0.001). The statistical significance remained for development (adjusted HR, 1.29; 95% CI, 1.10 to 1.51; P=0.001) and resolution (adjusted HR, 0.71; 95% CI, 0.54 to 0.94; P=0.018) of modified MASLD.
Conclusion
In Korean euthyroid adults, TT3 level was associated with development and resolution of either SLD or modified MASLD.
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Thyroid
Adequate Dose of Levothyroxine for Thyroid-Stimulating Hormone Suppression after Total Thyroidectomy in Patients with Differentiated Thyroid Cancer
Hyun Jin Ryu, Min Sun Choi, Hyunju Park, Tae Hyuk Kim, Jae Hoon Chung, So Young Park, Sun Wook Kim
Endocrinol Metab. 2024;39(4):615-621.   Published online August 7, 2024
DOI: https://doi.org/10.3803/EnM.2023.1896
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AbstractAbstract PDFPubReader   ePub   
Background
The adequate dose of levothyroxine (LT4) for patients who have undergone total thyroidectomy (TT) for differentiated thyroid cancer (DTC) is uncertain. We evaluated the LT4 dose required to achieve mild thyroid-stimulating hormone (TSH) suppression in DTC patients after TT.
Methods
The electronic medical records of patients who underwent TT for DTC and received mild TSH suppression therapy were reviewed. Linear regression analysis was performed to evaluate the association between LT4 dose (μg/kg) and an ordinal group divided by body mass index (BMI). We also evaluated the trend in LT4 doses among groups divided by BMI and age.
Results
In total, 123 patients achieved mild TSH suppression (0.1 to 0.5 mIU/L). The BMI variable was divided into three categories: <23 kg/m2 (n=46), ≥23 and <25 kg/m2 (n=30), and ≥25 kg/m2 (n=47). In the linear regression analysis, BMI was negatively associated with the LT4 dose after adjusting for age and sex (P<0.001). The LT4 doses required to achieve mild TSH suppression based on the BMI categories were 1.86, 1.71, and 1.71 μg/kg, respectively (P for trend <0.001). Further analysis with groups divided by age and BMI revealed that a higher BMI was related to a lower LT4 dose, especially in younger patients aged 20 to 39 (P for trend=0.011).
Conclusion
The study results suggest an appropriate LT4 dose for mild TSH suppression after TT based on body weight in patients with DTC. Considering body weight, BMI, and age in estimating LT4 doses might help to achieve the target TSH level promptly.

Citations

Citations to this article as recorded by  
  • Effects of 131I and TSH suppression therapy on METTL3, METTL14 levels and recurrence in thyroid cancer
    Li-Guo Yang
    American Journal of Cancer Research.2025; 15(1): 42.     CrossRef
  • Levothyroxine Dosing for Thyroid-Stimulating Hormone Suppression in Patients with Differentiated Thyroid Cancer after Total Thyroidectomy
    Mijin Kim
    Endocrinology and Metabolism.2024; 39(4): 576.     CrossRef
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Thyroid
Clinical Manifestations of Malignant Struma Ovarii: A Retrospective Case Series in a Tertiary Hospital in Korea
Hyun Jin Ryu, Da Eun Leem, Ji Hyun Yoo, Tae Hyuk Kim, Sun Wook Kim, Jae Hoon Chung
Endocrinol Metab. 2024;39(3):461-467.   Published online May 9, 2024
DOI: https://doi.org/10.3803/EnM.2023.1863
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  • 3 Web of Science
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AbstractAbstract PDFPubReader   ePub   
Background
Malignant struma ovarii (MSO) is a very rare disease in which thyroid cancer originates from the ovary. Because it is rare for endocrinologists to encounter patients with MSO, endocrinologists may have a limited understanding of the disease. Therefore, we analyzed and introduced its incidence and clinical course in a tertiary hospital in Korea.
Methods
We retrospectively investigated the clinical data of 170 patients who underwent surgery for struma ovarii at the Department of Obstetrics and Gynecology of Samsung Medical Center from 1994 to May 2023.
Results
Among 170 patients with struma ovarii, 15 (8.8%) were diagnosed with MSO. The median age of patients with MSO was 48 years (range, 30 to 74), and the median tumor size was 3.3 cm (range, 0.5 to 11.0). Papillary thyroid carcinoma (46.7%) was the most common subtypes followed by follicular thyroid carcinoma (26.7%). All patients were diagnosed after surgery, with no predictions from preoperative imaging. The surgical extent of gynecological surgery was variable. Four patients (26.7%) underwent thyroidectomy for thyroid cancer, while one underwent total thyroidectomy and radioactive iodine therapy for MSO with peritoneal metastasis. Except for one patient who underwent hemithyroidectomy, thyroid stimulating hormone suppression therapy was performed in four patients. Only 53% of MSO patients were consulted by an endocrinologist. With a median follow-up period of 33 months (range, 4 to 156), 11 patients remained disease-free, one experienced progression with peritoneal seeding, and the remaining one was in treatment. There have been no recurrences or deaths due to MSO.
Conclusion
An endocrinologist should be involved in establishing a therapeutic plan for MSO, for which the overall prognosis is generally favorable.

Citations

Citations to this article as recorded by  
  • Diagnostic Value of Nuclear Hybrid Imaging in Malignant Struma Ovarii: A Systematic Review of Case Reports
    Claudiu Peștean, Doina Piciu
    Diagnostics.2024; 14(23): 2630.     CrossRef
  • The Role of Radioiodine Therapy in Differentiated Thyroid Cancer Arising from Struma Ovarii: A Systematic Review
    Pietro Bellini, Francesco Dondi, Valentina Zilioli, Elisa Gatta, Maria Cavadini, Carlo Cappelli, Gian Luca Viganò, Francesco Bertagna
    Journal of Clinical Medicine.2024; 13(24): 7729.     CrossRef
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Corrigendum
Thyroid
Corrigendum: Abstract and Text Correction. 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. 2023;38(3):357.   Published online May 16, 2023
DOI: https://doi.org/10.3803/EnM.2023.301
Corrects: Endocrinol Metab 2017;32(1):106
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Original Articles
Thyroid
Identification of Mutations in the Thyroxine-Binding Globulin (TBG) Gene in Patients with TBG Deficiency in Korea
Jung Heo, Sang-Mi Kim, Hyun Jin Ryu, Hyunju Park, Tae Hyuk Kim, Jae Hoon Chung, Hyung-Doo Park, Sun Wook Kim
Endocrinol Metab. 2022;37(6):870-878.   Published online December 7, 2022
DOI: https://doi.org/10.3803/EnM.2022.1591
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  • 1 Web of Science
  • 1 Crossref
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Thyroxine-binding globulin (TBG) is a major transporter protein for thyroid hormones. The serpin family A member 7 (SERPINA7) gene codes for TBG, and mutations of the SERPINA7 gene result in TBG deficiency. Although more than 40 mutations have been reported in several countries, only a few studies of TBG deficiency and SERPINA7 gene mutation have been performed in Korea. The aim of this study is to review the clinical presentations and laboratory findings of patients with TBG deficiency and to investigate the types of SERPINA7 gene mutation.
Methods
Five unrelated Korean adults with TBG deficiency attending endocrinology clinic underwent SERPINA7 gene sequencing. Four patients harbored a SERPINA7 gene mutation. Serum thyroid hormones, anti-microsomal antibodies, and TBG were measured. Genomic DNA was extracted from whole blood. All exons and intron-exon boundaries of the TBG gene were amplified and sequencing was performed.
Results
Two patients were heterozygous females, and the other two were hemizygous males. One heterozygous female had coexisting hypothyroidism. The other heterozygous female was erroneously prescribed levothyroxine at a local clinic. One hemizygous male harbored a novel mutation, p.Phe269Cysfs*18, which caused TBG partial deficiency. Three patients had the p.Leu372Phefs*23 mutation, which is known as TBG-complete deficiency Japan (TBG-CDJ) and was also presented in previous mutation analyses in Korea.
Conclusion
This study presents four patients diagnosed with TBG deficiency and provides the results of SERPINA7 gene sequencing. One novel mutation, p.Phe269Cysfs*18, causing TBD-partial deficiency and three cases of TBG-CDJ were demonstrated. It is necessary to identify TBG deficiency to prevent improper treatment. Also, sequencing of the SERPINA7 gene would provide valuable information about the TBG variants in Korea.

Citations

Citations to this article as recorded by  
  • Development and basic performance verification of a rapid homogeneous bioassay for agonistic antibodies against the thyroid-stimulating hormone receptor
    Motoki Hoshina, Shiomi Ojima, Atsushi Kawasaki, Kosuke Doi, Satoshi Ohta, Asuka Inoue, Hiroshi Murayama
    Journal of Immunological Methods.2024; 528: 113655.     CrossRef
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Thyroid
Frequency of TERT Promoter Mutations in Real-World Analysis of 2,092 Thyroid Carcinoma Patients
Heera Yang, Hyunju Park, Hyun Jin Ryu, Jung Heo, Jung-Sun Kim, Young Lyun Oh, Jun-Ho Choe, Jung Han Kim, Jee Soo Kim, Hye Won Jang, Tae Hyuk Kim, Sun Wook Kim, Jae Hoon Chung
Endocrinol Metab. 2022;37(4):652-663.   Published online July 22, 2022
DOI: https://doi.org/10.3803/EnM.2022.1477
  • 6,332 View
  • 242 Download
  • 19 Web of Science
  • 23 Crossref
AbstractAbstract PDFSupplementary MaterialPubReader   ePub   
Background
Telomerase reverse transcriptase (TERT) promoter mutations are associated with increased recurrence and mortality in patients with thyroid carcinoma. Previous studies on TERT promoter mutations were retrospectively conducted on a limited number of patients.
Methods
We prospectively collected data on all consecutive patients who underwent thyroid carcinoma surgery between January 2019 and December 2020 at the Samsung Medical Center, Seoul, Korea. We included 2,092 patients with thyroid carcinoma.
Results
Of 2,092 patients, 72 patients (3.4%) had TERT promoter mutations. However, the frequency of TERT promoter mutations was 0.5% in papillary thyroid microcarcinoma (PTMC) ≤1 cm and it was 5.8% in papillary thyroid carcinoma (PTC) >1 cm. The frequency of TERT promoter mutations was significantly associated with older age at diagnosis (odds ratio [OR], 1.12; P<0.001), larger primary tumor size (OR, 2.02; P<0.001), and aggressive histological type (OR, 7.78 in follicular thyroid carcinoma; OR, 10.33 in poorly differentiated thyroid carcinoma; OR, 45.92 in anaplastic thyroid carcinoma; P<0.001). Advanced T stage, advanced N stage, and distant metastasis at diagnosis were highly prevalent in mutated thyroid cancers. However, initial distant metastasis was not present in patients with TERT promoter mutations in PTMC. Although the C228T mutation was more highly detected than the C250T mutation (64 cases vs. 7 cases), there were no significant clinicopathological differences.
Conclusion
This study is the first attempt to investigate the frequency of TERT promoter mutations in a real-world setting. The frequency of TERT promoter mutations in PTC was lower than expected, and in PTMC, young patients, and female patients, the frequency was very low.

Citations

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  • Prognostication with Thyroid GuidePx in the context of tall cell variants
    Steven Craig, Cynthia Stretch, Caitlin Yeo, Jeremy Fan, Haley Pedersen, Young Joo Park, Adrian Harvey, Oliver F. Bathe
    Surgery.2025; 177: 108882.     CrossRef
  • Prognostic impact of fibrosclerotic changes in non-papillary, non-anaplastic, follicular cell-derived thyroid carcinomas
    Giulia Orlando, Giulia Capella, Giulia Vocino Trucco, Elena Vissio, Jasna Metovic, Francesca Maletta, Marco Volante, Mauro Papotti
    Virchows Archiv.2025;[Epub]     CrossRef
  • Telomeres and telomerase in mesothelioma: Pathophysiology, biomarkers and emerging therapeutic strategies (Review)
    Dimitrios Andreikos, Demetrios Spandidos, Vasiliki Georgakopoulou
    International Journal of Oncology.2025;[Epub]     CrossRef
  • TERT Promoter Mutations Frequency Across Race, Sex, and Cancer Type
    Talal El Zarif, Marc Machaalani, Rashad Nawfal, Amin H Nassar, Wanling Xie, Toni K Choueiri, Mark Pomerantz
    The Oncologist.2024; 29(1): 8.     CrossRef
  • Gene mutations as predictors of central lymph mode metastasis in cN0 PTC: A meta‐analysis
    Jiaqi Ji, Xinlong Shi
    Clinical Genetics.2024; 105(2): 130.     CrossRef
  • Risk stratification by combining common genetic mutations and TERT promoter methylation in papillary thyroid cancer
    Ye Sang, Guanghui Hu, Junyu Xue, Mengke Chen, Shubin Hong, Rengyun Liu
    Endocrine.2024; 85(1): 304.     CrossRef
  • Shortened telomere length in peripheral blood leukocytes is associated with cumulative radioactive iodine doses in patients with differentiated thyroid carcinoma
    Hoonsung Choi, Sun Wook Cho, Hwan Hee Kim, Ka Hee Yi, Do Joon Park, Young Joo Park
    Cancer.2024; 130(12): 2215.     CrossRef
  • 2023 Update of the Korean Thyroid Association Guidelines for the Management of Thyroid Nodules
    Eun Kyung Lee, Young Joo Park
    Clinical Thyroidology®.2024; 36(4): 153.     CrossRef
  • Korean Thyroid Association Guidelines on the Management of Differentiated Thyroid Cancers; Part I. Initial Management of Differentiated Thyroid Cancers - Chapter 5. Evaluation of Recurrence Risk Postoperatively and Initial Risk Stratification in Different
    Eun Kyung Lee, Young Shin Song, Ho-Cheol Kang, Sun Wook Kim, Dong Gyu Na, Shin Je Moon, Dong-Jun Lim, Kyong Yeun Jung, Yun Jae Chung, Chan Kwon Jung, Young Joo Park
    International Journal of Thyroidology.2024; 17(1): 68.     CrossRef
  • Korean Thyroid Association Management Guidelines for Patients with Thyroid Nodules 2024
    Young Joo Park, Eun Kyung Lee, Young Shin Song, Su Hwan Kang, Bon Seok Koo, Sun Wook Kim, Dong Gyu Na, Seung-Kuk Baek, So Won Oh, Min Kyoung Lee, Sang-Woo Lee, Young Ah Lee, Yong Sang Lee, Ji Ye Lee, Dong-Jun Lim, Leehi Joo, Yuh-Seog Jung, Chan Kwon Jung,
    International Journal of Thyroidology.2024; 17(1): 208.     CrossRef
  • Predictive biomarkers in thyroid cancer in the current molecular-morphology paradigm
    Humberto Carvalho Carneiro, Rodrigo de Andrade Natal, Evelin Cavalcante Farias, Aline Almeida Bastos, Leila Guastapaglia, Alanna Mara Pinheiro Sobreira Bezerra, Ana Amélia Fialho de Oliveira Hoff
    Surgical and Experimental Pathology.2024;[Epub]     CrossRef
  • Catching the Silent Culprits: TERT Promoter Mutation Screening of Minimally Invasive Follicular and Oncocytic Thyroid Carcinoma in Clinical Practice
    L. Samuel Hellgren, Adam Stenman, Kenbugul Jatta, Vincenzo Condello, Catharina Larsson, Jan Zedenius, C. Christofer Juhlin
    Endocrine Pathology.2024; 35(4): 411.     CrossRef
  • Association Between Gross Features and Coexistence of BRAFV600E and TERT Promoter Mutations in Papillary Thyroid Carcinomas: A Combined Analysis Incorporating Clinicopathologic Features
    Thi Ngoc Anh Nguyen, Van Phu Thang Nguyen, Hirokazu Kurohama, Yuko Akazawa, Katsuya Matsuda, Zhanna Mussazhanova, Yuki Matsuoka, Kenichi Yokota, Shinya Satoh, Hiroyuki Yamashita, Thi Nhung Nguyen, Yerkerzhan Sailaubekova, Masahiro Nakashima
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  • Are TERT Promoter Mutations a Poor Prognostic Factor in Anaplastic Thyroid Carcinoma?
    Hyun Jin Ryu, Young Lyun Oh, Jung Heo, Hyunju Park, Tae Hyuk Kim, Sun Wook Kim, Jae Hoon Chung
    International Journal of Thyroidology.2024; 17(2): 286.     CrossRef
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    Gilseong Moon, Jae Hyun Park, Taesic Lee, Jong Ho Yoon
    Journal of Clinical Medicine.2024; 13(24): 7769.     CrossRef
  • Deciphering the Functions of Telomerase Reverse Transcriptase in Head and Neck Cancer
    Tsung-Jang Yeh, Chi-Wen Luo, Jeng-Shiun Du, Chien-Tzu Huang, Min-Hung Wang, Tzer-Ming Chuang, Yuh-Ching Gau, Shih-Feng Cho, Yi-Chang Liu, Hui-Hua Hsiao, Li-Tzong Chen, Mei-Ren Pan, Hui-Ching Wang, Sin-Hua Moi
    Biomedicines.2023; 11(3): 691.     CrossRef
  • 2023 Korean Thyroid Association Management Guidelines for Patients with Thyroid Nodules
    Young Joo Park, Eun Kyung Lee, Young Shin Song, Soo Hwan Kang, Bon Seok Koo, Sun Wook Kim, Dong Gyu Na, Seung-Kuk Baek, So Won Oh, Min Kyoung Lee, Sang-Woo Lee, Young Ah Lee, Yong Sang Lee, Ji Ye Lee, Dong-Jun Lim, Leehi Joo, Yuh-Seog Jung, Chan Kwon Jung
    International Journal of Thyroidology.2023; 16(1): 1.     CrossRef
  • Thyroid Cancer, Iodine, and Gene Mutation
    Jae Hoon Chung
    International Journal of Thyroidology.2023; 16(1): 89.     CrossRef
  • Mortality rate and causes of death in papillary thyroid microcarcinoma
    Jung Heo, Hyun Jin Ryu, Hyunju Park, Tae Hyuk Kim, Sun Wook Kim, Young Lyun Oh, Jae Hoon Chung
    Endocrine.2023; 83(3): 671.     CrossRef
  • TERT promoter mutations in thyroid cancer
    Michiko Matsuse, Norisato Mitsutake
    Endocrine Journal.2023; 70(11): 1035.     CrossRef
  • TERT Promoter and BRAF V600E Mutations in Papillary Thyroid Cancer: A Single-Institution Experience in Korea
    Min Jhi Kim, Jin Kyong Kim, Gi Jeong Kim, Sang-Wook Kang, Jandee Lee, Jong Ju Jeong, Woong Youn Chung, Daham Kim, Kee-Hyun Nam
    Cancers.2022; 14(19): 4928.     CrossRef
  • Frequency of TERT Promoter Mutations in Real-World Analysis of 2,092 Thyroid Carcinoma Patients (Endocrinol Metab 2022;37:652-63, Heera Yang et al.)
    Hyunju Park, Jae Hoon Chung
    Endocrinology and Metabolism.2022; 37(6): 949.     CrossRef
  • Frequency of TERT Promoter Mutations in Real-World Analysis of 2,092 Thyroid Carcinoma Patients (Endocrinol Metab 2022;37:652-63, Heera Yang et al.)
    Sue Youn Kim, Chan Kwon Jung
    Endocrinology and Metabolism.2022; 37(6): 947.     CrossRef
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Calcium & Bone Metabolism
Bone Mineral Density Screening Interval and Transition to Osteoporosis in Asian Women
Hyunju Park, Heera Yang, Jung Heo, Hye Won Jang, Jae Hoon Chung, Tae Hyuk Kim, Yong-Ki Min, Sun Wook Kim
Endocrinol Metab. 2022;37(3):506-512.   Published online June 9, 2022
DOI: https://doi.org/10.3803/EnM.2022.1429
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AbstractAbstract PDFPubReader   ePub   
Background
Bone mineral density (BMD) testing is indicated for women aged 65 years, but screening strategies for osteoporosis are controversial. Currently, there is no study focusing on the BMD testing interval in Asian populations. The current study aimed to evaluate the estimated time interval for screening osteoporosis.
Methods
We conducted a study of 6,385 subjects aged 50 years and older who underwent dual-energy X-ray absorptiometry screening more than twice at Samsung Medical Center as participants in a routine health checkup. Subjects were divided based on baseline T-score into mild osteopenia (T-score, <–1.0 to >–1.5), moderate osteopenia (T-score, ≤–1.5 to >–2.0), and severe osteopenia (T-score, ≤–2.0 to >–2.5). Information about personal medical and social history was collected by a structured questionnaire.
Results
The adjusted estimated BMD testing interval for 10% of the subjects to develop osteoporosis was 13.2 years in mild osteopenia, 5.0 years in moderate osteopenia, and 1.5 years in severe osteopenia.
Conclusion
Our study provides extended information about BMD screening intervals in Asian female population. Baseline T-score was important for predicting BMD screening interval, and repeat BMD testing within 5 years might not be necessary in mild osteopenia subjects.

Citations

Citations to this article as recorded by  
  • A randomized controlled trial of the effect of raloxifene plus cholecalciferol versus cholecalciferol alone on bone mineral density in postmenopausal women with osteopenia
    Sungjae Shin, Namki Hong, Yumie Rhee
    JBMR Plus.2024;[Epub]     CrossRef
  • Divergent associations of inflammatory markers with bone turnover markers in elderly patients with osteoporotic fractures
    Jian Xu, Yue-qin Guo, Shao-han Guo, Min-zhe Xu, Chong Li, Ya-qin Gong, Ke Lu
    Scientific Reports.2024;[Epub]     CrossRef
  • Effects of Bazedoxifene/Vitamin D Combination Therapy on Serum Vitamin D Levels and Bone Turnover Markers in Postmenopausal Women with Osteopenia: A Randomized Controlled Trial
    Chaiho Jeong, Jeonghoon Ha, Jun-Il Yoo, Young-Kyun Lee, Jung Hee Kim, Yong-Chan Ha, Yong-Ki Min, Dong-Won Byun, Ki-Hyun Baek, Ho Yeon Chung
    Journal of Bone Metabolism.2023; 30(2): 189.     CrossRef
  • Bone-modifying agents for non–small-cell lung cancer patients with bone metastases during the era of immune checkpoint inhibitors: A narrative review
    Jinyoung Kim, Chaiho Jeong, Jeongmin Lee, Jeonghoon Ha, Ki-Hyun Baek, Seohyun Kim, Tai Joon An, Chan Kwon Park, Hyoung Kyu Yoon, Jeong Uk Lim
    Seminars in Oncology.2023; 50(3-5): 105.     CrossRef
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Thyroid
Big Data Articles (National Health Insurance Service Database)
Graves’ Disease and the Risk of End-Stage Renal Disease: A Korean Population-Based Study
Yoon Young Cho, Bongseong Kim, Dong Wook Shin, Hye Ryoun Jang, Bo-Yeon Kim, Chan-Hee Jung, Jae Hyeon Kim, Sun Wook Kim, Jae Hoon Chung, Kyungdo Han, Tae Hyuk Kim
Endocrinol Metab. 2022;37(2):281-289.   Published online April 6, 2022
DOI: https://doi.org/10.3803/EnM.2021.1333
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AbstractAbstract PDFPubReader   ePub   
Background
Hyperthyroidism is associated with an increased glomerular filtration rate (GFR) in the hyperdynamic state, which is reversible after restoring euthyroidism. However, long-term follow-up of renal dysfunction in patients with hyperthyroidism has not been performed.
Methods
This was a retrospective cohort study using the Korean National Health Insurance database and biannual health checkup data. We included 41,778 Graves’ disease (GD) patients and 41,778 healthy controls, matched by age and sex. The incidences of end-stage renal disease (ESRD) were calculated in GD patients and controls. The cumulative dose and duration of antithyroid drugs (ATDs) were calculated for each patient and categorized into the highest, middle, and lowest tertiles.
Results
Among 41,778 GD patients, 55 ESRD cases occurred during 268,552 person-years of follow-up. Relative to the controls, regardless of smoking, drinking, or comorbidities, including chronic kidney disease, GD patients had a 47% lower risk of developing ESRD (hazard ratio [HR], 0.53; 95% confidence interval [CI], 0.37 to 0.76). In particular, GD patients with a higher baseline GFR (≥90 mL/min/1.73 m2; HR, 0.33; 95% CI, 0.11 to 0.99), longer treatment duration (>33 months; HR, 0.31; 95% CI, 0.17 to 0.58) or higher cumulative dose (>16,463 mg; HR, 0.29; 95% CI, 0.15 to 0.57) of ATDs had a significantly reduced risk of ESRD.
Conclusion
This was the first epidemiological study on the effect of GD on ESRD, and we demonstrated that GD population had a reduced risk for developing ESRD.

Citations

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Corrigendum
Miscellaneous
Corrigendum: Correction of Acknowledgments. Protocol for a Korean Multicenter Prospective Cohort Study of Active Surveillance or Surgery (KoMPASS) in Papillary Thyroid Microcarcinoma
Min Ji Jeon, Yea Eun Kang, Jae Hoon Moon, Dong Jun Lim, Chang Yoon Lee, Yong Sang Lee, Sun Wook Kim, Min-Hee Kim, Bo Hyun Kim, Ho-Cheol Kang, Minho Shong, Sun Wook Cho, Won Bae Kim
Endocrinol Metab. 2022;37(1):181-182.   Published online February 28, 2022
DOI: https://doi.org/10.3803/EnM.2022.104
Corrects: Endocrinol Metab 2021;36(2):359
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  • Risk of thyroid cancer associated with glucagon‐like peptide‐1 receptor agonists and dipeptidyl peptidase‐4 inhibitors in patients with type 2 diabetes: A population‐based cohort study
    Sungho Bea, Heejun Son, Jae Hyun Bae, Sun Wook Cho, Ju‐Young Shin, Young Min Cho
    Diabetes, Obesity and Metabolism.2024; 26(1): 108.     CrossRef
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Original Articles
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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AbstractAbstract PDFPubReader   ePub   
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.

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    Li-Guo Yang
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    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
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    璐 狄
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Clinical Study
Protocol for a Korean Multicenter Prospective Cohort Study of Active Surveillance or Surgery (KoMPASS) in Papillary Thyroid Microcarcinoma
Min Ji Jeon, Yea Eun Kang, Jae Hoon Moon, Dong Jun Lim, Chang Yoon Lee, Yong Sang Lee, Sun Wook Kim, Min-Hee Kim, Bo Hyun Kim, Ho-Cheol Kang, Minho Shong, Sun Wook Cho, Won Bae Kim
Endocrinol Metab. 2021;36(2):359-364.   Published online March 23, 2021
DOI: https://doi.org/10.3803/EnM.2020.890
Correction in: Endocrinol Metab 2022;37(1):181
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AbstractAbstract PDFPubReader   ePub   
Background
A Korean Multicenter Prospective cohort study of Active Surveillance or Surgery (KoMPASS) for papillary thyroid microcarcinomas (PTMCs) has been initiated. The aim is to compare clinical outcomes between active surveillance (AS) and an immediate lobectomy for low-risk PTMCs. We here outline the detailed protocol for this study.
Methods
Adult patients with a cytopathologically confirmed PTMC sized 6.0 to 10.0 mm by ultrasound (US) will be included. Patients will be excluded if they have a suspicious extra-thyroidal extension or metastasis of a PTMC or multiple thyroid nodules or other thyroid diseases which require a total thyroidectomy. Printed material describing the prognosis of PTMCs, and the pros and cons of each management option, will be provided to eligible patients to select their preferred intervention. For the AS group, thyroid US, thyroid function, and quality of life (QoL) parameters will be monitored every 6 months during the first year, and then annually thereafter. Disease progression will be defined as a ≥3 mm increase in maximal diameter of a PTMC, or the development of new thyroid cancers or metastases. If progression is detected, patients should undergo appropriate surgery. For the lobectomy group, a lobectomy with prophylactic central neck dissection will be done within 6 months. After initial surgery, thyroid US, thyroid function, serum thyroglobulin (Tg), anti-Tg antibody, and QoL parameters will be monitored every 6 months during the first year and annually thereafter. Disease progression will be defined in these cases as the development of new thyroid cancers or metastases.
Conclusion
KoMPASS findings will help to confirm the role of AS, and develop individualized management strategies, for low-risk PTMCs.

Citations

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  • Active Surveillance for Low-Risk Thyroid Cancers: A Review of Current Practice Guidelines
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    Jee Hee Yoon, Wonsuk Choi, Ji Yong Park, A Ram Hong, Hee Kyung Kim, Ho-Cheol Kang
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    Min Joo Kim, Hojeong Won, Won Bae Kim, Eun Kyung Lee, Chang Yoon Lee, Sun Wook Cho, Han-Sang Baek, Yong Sang Lee, Yea Eun Kang, Sun Wook Kim, Ho-Cheol Kang, Jeongmin Lee, Mijin Kim, Min Ji Jeon, Jae Hoon Moon
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    Ji Ye Lee, Min Kyoung Lee, Hyun Kyung Lim, Chang Yoon Lee, Jin Yong Sung, Jung Hyun Yoon, Soo Yeon Han, Jung Hee Shin, Ji-hoon Kim, So Lyung Jung, Sae Rom Chung, Jung Hwan Baek, Dong Gyu Na
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A Clinical Study on Hypopitutiarism: Significance of Combined Pituitary Stimulation Test.
Bo Youn Cho, Hong Gyu Lee, Chang Soon Koh, Hyung Kyu Park, Sook Kyung Kim, Chan Soo Shin, Seong Yeon Kim, Jae Seok Chun, Kyung Soo Park, Hyeon Kyu Kim, Sun Wook Kim
J Korean Endocr Soc. 1996;11(3):268-276.   Published online November 7, 2019
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AbstractAbstract PDF
Background
Hypopituitarism can be caused by various diseases. Its clinical manifestations vary, depending on the extent and severity of the pituitary hormone deficiency. And some patients may initially present with SIADH-like features. Combined pituitary stimulation test has been used for the diagnosis of hypopituitarism and subsequent hormone replacement therapy. However, the test is laborious, expensive and uncomfortable to the patients, So we performed this study to know whether combined pituitary stimulation test can be replaced with clinical features and simple basal hormone concentrations. Methods: Fifty-four patients who were diagnosed as hypopituitarism by combined pituitary stimulation test were included in this study. Clinical features and basal hormone data were compared with the results of combined pituitary stimulation test for the evaluation of pituitary-gonadal, pituitary-thyroid, and pituitary-adrenal axes, using X2 test. Results: 1) In pituitary-gonadal axis, the evaluation of clinical features and basal gonad hormone concentrations were significantly consistent with stimulation test(p<0.05), 2) In pituitary-thyroid axis, the evaluation of basal thyroid hormone concentrations were more helpful than stimulation test though results of the two tests were not consistent. 3) In pituitary-adrenal axis, all patients whose basal cortisol concentrations were low showed inadequate responses to stimulation test. However, stimulation test revealed adrenal insufficiency in some patients with normal basal cortisol concentrations. 4) 9 patients who presented with SIADH-like features were older than the others and had all corticotropin deficiency. Conclusion: In patients with suspected hypopituitarism, the evaluation of clinical features and basal hormone concentrations can be sufficient for the diagnosis of hypopituitarism and hormone replacement therapy. However, stimulation test is necessary to investigate adrenal function in patients with normal basal cortisol concentrations. And hypopituitarism should be considered in old patients who present with SIADH-like features.
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Thyroid
Prognosis of Differentiated Thyroid Carcinoma with Initial Distant Metastasis: A Multicenter Study in Korea
Hosu Kim, Hye In Kim, Sun Wook Kim, Jaehoon Jung, Min Ji Jeon, Won Gu Kim, Tae Yong Kim, Hee Kyung Kim, Ho-Cheol Kang, Ji Min Han, Yoon Young Cho, Tae Hyuk Kim, Jae Hoon Chung
Endocrinol Metab. 2018;33(2):287-295.   Published online June 21, 2018
DOI: https://doi.org/10.3803/EnM.2018.33.2.287
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AbstractAbstract PDFPubReader   ePub   
Background

Most patients with differentiated thyroid cancer (DTC) have a favorable prognosis. However, patients with DTC and initial distant metastasis have not been commonly found, and their clinical characteristics have seldom been reported. In this study, we analyzed the clinical features and prognosis of patients with DTC and initial distant metastasis in Korea.

Methods

We retrospectively reviewed the clinical data of 242 patients with DTC and initial distant metastasis treated from 1994 to 2013, collected from five tertiary hospitals in Korea.

Results

The patients' median age was 51 years, and 65% were women. They were followed for a median of 7 years. Lung was the most common site of distant metastasis: only lung 149 patients (62%), only bone 49 (20%), other single site one (pleura), and combined sites 43 (40 were lung and bone, two were bone and other site, and one was lung and other site). At the time of diagnosis, 50 patients (21%) had non-radioactive iodine (RAI) avidity. Five-year disease-specific survival (DSS) was 85% and 10-year DSS was 68%, which were better than those in previous studies. After multivariate analysis, old age, male sex, metastatic site, and histologic type (follicular type) were significant factors for poor prognosis. However, negative RAI avidity status was not a significant prognostic factor after adjusting for other variables.

Conclusion

The prognosis of Korean patients with DTC and initial distant metastasis was better than in previous studies. Old age, male sex, metastasis site, and histologic type were significant prognostic factors.

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    Claudio Spinelli, Beatrice Sanna, Marco Ghionzoli, Elisabetta Micelli
    World Journal of Obstetrics and Gynecology.2022; 11(3): 33.     CrossRef
  • Initial clinical and treatment patterns of advanced differentiated thyroid cancer: ERUDIT study
    Juan Antonio Vallejo Casas, Marcel Sambo, Carlos López López, Manuel Durán-Poveda, Julio Rodríguez-Villanueva García, Rita Joana Santos, Marta Llanos, Elena Navarro-González, Javier Aller, Virginia Pubul, Sonsoles Guadalix, Guillermo Crespo, Cintia Gonzál
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  • Male sex is not an independent risk factor for recurrence of differentiated thyroid cancer: a propensity score-matching study
    Joonseon Park, Kwangsoon Kim, Dong-Jun Lim, Ja Seong Bae, Jeong Soo Kim
    Scientific Reports.2021;[Epub]     CrossRef
  • Evaluation of the 2015 ATA Guidelines in Patients With Distant Metastatic Differentiated Thyroid Cancer
    Evert F S van Velsen, Merel T Stegenga, Folkert J van Kemenade, Boen L R Kam, Tessa M van Ginhoven, W Edward Visser, Robin P Peeters
    The Journal of Clinical Endocrinology & Metabolism.2020; 105(3): e457.     CrossRef
  • Usefulness of a 3D‐Printed Thyroid Cancer Phantom for Clinician to Patient Communication
    Dayeong Hong, Sangwook Lee, Taehun Kim, Jung Hwan Baek, Won Woong Kim, Ki‐Wook Chung, Namkug Kim, Tae‐Yon Sung
    World Journal of Surgery.2020; 44(3): 788.     CrossRef
  • Estimating the Growth Rate of Lung Metastases in Differentiated Thyroid Carcinoma: Response Evaluation Criteria in Solid Tumors or Doubling Time?
    Eyun Song, Jonghwa Ahn, Min Ji Jeon, Sang Min Lee, Jeong Hyun Lee, Tae Yong Kim, Jung Hwan Baek, Won Bae Kim, Young Kee Shong, Won Gu Kim
    Thyroid.2020; 30(3): 418.     CrossRef
  • Personalized management of differentiated thyroid cancer in real life – practical guidance from a multidisciplinary panel of experts
    Alfredo Campennì, Daniele Barbaro, Marco Guzzo, Francesca Capoccetti, Luca Giovanella
    Endocrine.2020; 70(2): 280.     CrossRef
  • Unusual metastases from differentiated thyroid cancers: A multicenter study in Korea
    Jee Hee Yoon, Min Ji Jeon, Mijin Kim, A. Ram Hong, Hee Kyung Kim, Dong Yeob Shin, Bo Hyun Kim, Won Bae Kim, Young Kee Shong, Ho-Cheol Kang, Domenico Albano
    PLOS ONE.2020; 15(8): e0238207.     CrossRef
  • Extended Real-World Observation of Patients Treated with Sorafenib for Radioactive Iodine-Refractory Differentiated Thyroid Carcinoma and Impact of Lenvatinib Salvage Treatment: A Korean Multicenter Study
    Hye-Seon Oh, Dong Yeob Shin, Mijin Kim, So Young Park, Tae Hyuk Kim, Bo Hyun Kim, Eui Young Kim, Won Bae Kim, Jae Hoon Chung, Young Kee Shong, Dong Jun Lim, Won Gu Kim
    Thyroid.2019; 29(12): 1804.     CrossRef
  • Clinical outcomes and prognostic factors in patients with no less than three distant organ system metastases from differentiated thyroid carcinoma
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  • Molecular Profile and Clinical Outcomes in Differentiated Thyroid Cancer Patients Presenting with Bone Metastasis
    Nilma Malik, Alyaksandr V. Nikitski, Elie Klam, Jason Hunt, Benjamin Witt, Barbara Chadwick, Yuri E. Nikiforov, Devaprabu Abraham
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  • Improved survival after early detection of asymptomatic distant metastasis in patients with thyroid cancer
    Hosu Kim, So Young Park, Jaehoon Jung, Jung-Han Kim, Soo Yeon Hahn, Jung Hee Shin, Young Lyun Oh, Man Ki Chung, Hye In Kim, Sun Wook Kim, Jae Hoon Chung, Tae Hyuk Kim
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  • Unusual metastases from differentiated thyroid carcinoma: analysis of 36 cases
    Anabela Zunino, Fabián Pitoia, Eduardo Faure, Adriana Reyes, Mónica Sala, Rosana Sklate, Verónica Ilera, Inés Califano
    Endocrine.2019; 65(3): 630.     CrossRef
  • The Prognosis of Papillary Thyroid Cancer with Initial Distant Metastasis is Strongly Associated with Extensive Extrathyroidal Extension: A Retrospective Cohort Study
    Young Ki Lee, Daham Kim, Dong Yeob Shin, Cho Rok Lee, Eun Jig Lee, Sang-Wook Kang, Jandee Lee, Jong Ju Jeong, Kee-Hyun Nam, Woong Youn Chung, Cheong Soo Park
    Annals of Surgical Oncology.2019; 26(7): 2200.     CrossRef
  • Risk Factors for Distant Metastasis in Follicular Thyroid Carcinoma in Korea
    Shin Dol Jo, Joon-Hyop Lee, Suk Ha Kang, Yun Yeong Kim, Yong Soon Chun, Heung Kyu Park, Sang Tae Choi, Jin Mo Kang, Yoo Seung Chung
    Journal of Endocrine Surgery.2019; 19(1): 1.     CrossRef
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    Houwei Zhu, Yanqing Qu
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  • 甲状腺腫瘍治療の最新情報

    Nippon Jibiinkoka Gakkai Kaiho.2018; 121(11): 1336.     CrossRef
  • Clinical Outcomes of Differentiated Thyroid Cancer Patients with Local Recurrence or Distant Metastasis Detected in Old Age
    Ji Min Han, Ji Cheol Bae, Hye In Kim, Sam Kwon, Min Ji Jeon, Won Gu Kim, Tae Yong Kim, Young Kee Shong, Won Bae Kim
    Endocrinology and Metabolism.2018; 33(4): 459.     CrossRef
  • Efficacy and Affecting Factors of 131I Thyroid Remnant Ablation After Surgical Treatment of Differentiated Thyroid Carcinoma
    Chen Wang, Hongcui Diao, Ping Ren, Xufu Wang, Yangang Wang, Wenjuan Zhao
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