Endocrinology and Metabolism

Original Articles

Thyroid Thyroid Cancer Screening
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; Endocrinol Metab. 2024;39(2):310-323. Published online April 9, 2024; DOI: https://doi.org/10.3803/EnM.2023.1870

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Abstract PDF Supplementary Material PubReader ePub: Background
There is debate about ultrasonography screening for thyroid cancer and its cost-effectiveness. This study aimed to evaluate the cost-effectiveness of early screening (ES) versus symptomatic detection (SD) for differentiated thyroid cancer (DTC) in Korea.
Methods
A Markov decision analysis model was constructed to compare the cost-effectiveness of ES and SD. The model considered direct medical costs, health outcomes, and different diagnostic and treatment pathways. Input data were derived from literature and Korean population studies. Incremental cost-effectiveness ratio (ICER) was calculated. Willingness-to-pay (WTP) threshold was set at USD 100,000 or 20,000 per quality-adjusted life year (QALY) gained. Sensitivity analyses were conducted to address uncertainties of the model’s variables.
Results
In a base case scenario with 50 years of follow-up, ES was found to be cost-effective compared to SD, with an ICER of $2,852 per QALY. With WTP set at $100,000, in the case with follow-up less than 10 years, the SD was cost-effective. Sensitivity analysis showed that variables such as lobectomy probability, age, mortality, and utility scores significantly influenced the ICER. Despite variations in costs and other factors, all ICER values remained below the WTP threshold.
Conclusion
Findings of this study indicate that ES is a cost-effective strategy for DTC screening in the Korean medical system. Early detection and subsequent lobectomy contribute to the cost-effectiveness of ES, while SD at an advanced stage makes ES more cost-effective. Expected follow-up duration should be considered to determine an optimal strategy for DTC screening.

Thyroid
Clinicopathological Features and Molecular Signatures of Lateral Neck Lymph Node Metastasis in Papillary Thyroid Microcarcinoma: Jinsun Lim, Han Sai Lee, Jin-Hyung Heo, Young Shin Song; Endocrinol Metab. 2024;39(2):324-333. Published online April 4, 2024; DOI: https://doi.org/10.3803/EnM.2023.1885

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Abstract PDF Supplementary Material PubReader ePub: Background
The predictive factors for lateral neck lymph node metastasis (LLNM) in papillary thyroid microcarcinoma (PTMC) remain undetermined. This study investigated the clinicopathological characteristics, transcriptomes, and tumor microenvironment in PTMC according to the LLNM status. We aimed to identify the biomarkers associated with LLNM development.
Methods
We retrospectively reviewed the medical records of patients with PTMC from two independent institutions between 2018 and 2022 (n=597 and n=467). We compared clinicopathological features between patients without lymph node metastasis (N0) and those with LLNM (N1b). Additionally, laser capture microdissection and RNA sequencing were performed on primary tumors from both groups, including metastatic lymph nodes from the N1b group (n=30; 20 primary tumors and 10 paired LLNMs). We corroborated the findings using RNA sequencing data from 16 BRAF-like PTMCs from The Cancer Genome Atlas. Transcriptomic analyses were validated by immunohistochemical staining.
Results
Clinicopathological characteristics, such as male sex, multifocality, extrathyroidal extension, lymphatic invasion, and central node metastasis showed associations with LLNM in PTMCs. Transcriptomic profiles between the N0 and N1b PTMC groups were similar. However, tumor microenvironment deconvolution from RNA sequencing and immunohistochemistry revealed an increased abundance of tumor-associated macrophages, particularly M2 macrophages, in the N1b group.
Conclusion
Patients with PTMC who have a male sex, multifocality, extrathyroidal extension, lymphatic invasion, and central node metastasis exhibited an elevated risk for LLNM. Furthermore, infiltration of M2 macrophages in the tumor microenvironment potentially supports tumor progression and LLNM in PTMCs.

Review Article

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.

Original Articles

Thyroid
Active Surveillance for Low-Risk Papillary Thyroid Carcinoma as an Acceptable Management Option with Additional Benefits: A Comprehensive Systematic Review: Jee Hee Yoon, Wonsuk Choi, Ji Yong Park, A Ram Hong, Hee Kyung Kim, Ho-Cheol Kang; Endocrinol Metab. 2024;39(1):152-163. Published online January 22, 2024; DOI: https://doi.org/10.3803/EnM.2023.1794

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Background
Active surveillance (AS) has been introduced as a management strategy for low-risk papillary thyroid carcinoma (PTC) due to its typically indolent nature. Despite this, the widespread adoption of AS has encountered several challenges. The aim of this systematic review was to evaluate the safety of AS related to disease progression and its benefits compared with immediate surgery (IS).
Methods
Studies related to AS in patients with low-risk PTC were searched through the Ovid MEDLINE, Embase, Cochrane Library, and KoreaMed databases. Studies on disease progression, surgical complication, quality of life (QoL), and cost-effectiveness were separately analyzed and narratively synthesized.
Results
In the evaluation of disease progression, the proportions of cases with tumor growth ≥3 mm and a volume increase >50% were 2.2%–10.8% and 16.0%–25.5%, respectively. Newly detected lymph node metastasis was identified in 0.0%–1.4% of patients. No significant difference was found between IS and delayed surgery in surgical complications, including vocal cord paralysis and postoperative hypoparathyroidism. AS was associated with better QoL than IS. Studies on the cost-effectiveness of AS reported inconsistent data, but AS was more cost-effective when quality-adjusted life years were considered.
Conclusion
AS is an acceptable management option for patients with low-risk PTC based on the low rate of disease progression and the absence of an increased mortality risk. AS has additional benefits, including improved QoL and greater QoL-based cost-effectiveness.

Citations

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It Is Time to Understand the Additional Benefits of Active Surveillance for Low-Risk Papillary Thyroid Carcinoma
Kyeong Jin Kim
Endocrinology and Metabolism.2024; 39(1): 95. CrossRef

Thyroid
Comparative Analysis of Driver Mutations and Transcriptomes in Papillary Thyroid Cancer by Region of Residence in South Korea: Jandee Lee, Seonhyang Jeong, Hwa Young Lee, Sunmi Park, Meesson Jeong, Young Suk Jo; Endocrinol Metab. 2023;38(6):720-729. Published online November 6, 2023; DOI: https://doi.org/10.3803/EnM.2023.1758

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Abstract PDF Supplementary Material PubReader ePub: Background
Radiation exposure is a well-known risk factor for papillary thyroid cancer (PTC). South Korea has 24 nuclear reactors in operation; however, no molecular biological analysis has been performed on patients with PTC living near nuclear power plants.
Methods
We retrospectively included patients with PTC (n=512) divided into three groups according to their place of residence at the time of operation: inland areas (n=300), coastal areas far from nuclear power plants (n=134), and nuclear power plant areas (n=78). After propensity score matching (1:1:1) by age, sex, and surgical procedure, the frequency of representative driver mutations and gene expression profiles were compared (n=50 per group). Epithelial-mesenchymal transition (EMT), BRAF, thyroid differentiation, and radiation scores were calculated and compared.
Results
No significant difference was observed in clinicopathological characteristics, including radiation exposure history and the frequency of incidentally discovered thyroid cancer, among the three groups. BRAF^V600E mutation was most frequently detected in the groups, with no difference among the three groups. Furthermore, gene expression profiles showed no statistically significant difference. EMT and BRAF scores were higher in our cohort than in cohorts from Chernobyl tissue bank and The Cancer Genome Atlas Thyroid Cancer; however, there was no difference according to the place of residence. Radiation scores were highest in the Chernobyl tissue bank but exhibited no difference according to the place of residence.
Conclusion
Differences in clinicopathological characteristics, frequency of representative driver mutations, and gene expression profiles were not observed according to patients’ region of residence in South Korea.

Thyroid
Different Molecular Phenotypes of Progression in BRAF- and RAS-Like Papillary Thyroid Carcinoma: Jinsun Lim, Han Sai Lee, Jiyun Park, Kyung-Soo Kim, Soo-Kyung Kim, Yong-Wook Cho, Young Shin Song; Endocrinol Metab. 2023;38(4):445-454. Published online July 18, 2023; DOI: https://doi.org/10.3803/EnM.2023.1702

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Abstract PDF Supplementary Material PubReader ePub: Background
Papillary thyroid carcinoma (PTC) can be classified into two distinct molecular subtypes, BRAF-like (BL) and RASlike (RL). However, the molecular characteristics of each subtype according to clinicopathological factors have not yet been determined. We aimed to investigate the gene signatures and tumor microenvironment according to clinicopathological factors, and to identify the mechanism of progression in BL-PTCs and RL-PTCs.
Methods
We analyzed RNA sequencing data and corresponding clinicopathological information of 503 patients with PTC from The Cancer Genome Atlas database. We performed differentially expressed gene (DEG), Gene Ontology, and molecular pathway enrichment analyses according to clinicopathological factors in each molecular subtype. EcoTyper and CIBERSORTx were used to deconvolve the tumor cell types and their surrounding microenvironment.
Results
Even for the same clinicopathological factors, overlapping DEGs between the two molecular subtypes were uncommon, indicating that BL-PTCs and RL-PTCs have different progression mechanisms. Genes related to the extracellular matrix were commonly upregulated in BL-PTCs with aggressive clinicopathological factors, such as old age (≥55 years), presence of extrathyroidal extension, lymph node metastasis, advanced tumor-node-metastasis (TNM) stage, and high metastasis-age-completeness of resection- invasion-size (MACIS) scores (≥6). Furthermore, in the deconvolution analysis of tumor microenvironment, cancer-associated fibroblasts were significantly enriched. In contrast, in RL-PTCs, downregulation of immune response and immunoglobulin-related genes was significantly associated with aggressive characteristics, even after adjusting for thyroiditis status.
Conclusion
The molecular phenotypes of cancer progression differed between BL-PTC and RL-PTC. In particular, extracellular matrix and cancer-associated fibroblasts, which constitute the tumor microenvironment, would play an important role in the progression of BL-PTC that accounts for the majority of advanced PTCs.

Thyroid
Diagnostic Performance of Thyroid Core Needle Biopsy Using the Revised Reporting System: Comparison with Fine Needle Aspiration Cytology: Kwangsoon Kim, Ja Seong Bae, Jeong Soo Kim, So Lyung Jung, Chan Kwon Jung; Endocrinol Metab. 2022;37(1):159-169. Published online February 28, 2022; DOI: https://doi.org/10.3803/EnM.2021.1299

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Background
We aim to validate the diagnostic performance of thyroid core needle biopsy (CNB) for diagnosing malignancy in clinical settings to align with the changes made in recently updated thyroid CNB guidelines.
Methods
We retrospectively analyzed 1,381 thyroid CNB and 2,223 fine needle aspiration (FNA) samples. The FNA and CNB slides were interpreted according to the Bethesda System for Reporting Thyroid Cytopathology and updated practice guidelines for thyroid CNB, respectively.
Results
Compared to FNA, CNB showed lower rates of inconclusive results: categories I (2.8% vs. 11.2%) and III (1.2% vs. 6.2%), and higher rates of categories II (60.9% vs. 50.4%) and IV (17.5% vs. 2.0%). The upper and lower bounds of the risk of malignancy (ROM) for category IV of CNB were 43.2% and 26.6%, respectively. The CNB subcategory IVb with nuclear atypia had a higher ROM than the subcategory without nuclear atypia (40%–62% vs. 23%–36%). In histologically confirmed cases, there was no significant difference in the diagnostic performance between CNB and FNA for malignancy. However, neoplastic diseases were more frequently detected by CNB than by FNA (88.8% vs. 77.6%, P=0.046). In category IV, there was no difference in unnecessary surgery rate between CNB and FNA (4.7% vs. 6.9%, P=0.6361).
Conclusion
Thyroid CNB decreased the rate of inconclusive results and showed a higher category IV diagnostic rate than FNA. The revised guidelines for thyroid CNB proved to be an excellent reporting system for assessing thyroid nodules.

Citations

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Muzaffer Serdar Deniz, Merve Dindar
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Myriam Decaussin-Petrucci, Beatrix Cochand Priollet, Emannuelle Leteurtre, Frédérique Albarel, Françoise Borson-Chazot
Annales de Pathologie.2024; 44(1): 20. CrossRef
A comparative analysis of core needle biopsy and repeat fine needle aspiration in patients with inconclusive initial cytology of thyroid nodules
Xuejiao Su, Can Yue, Wanting Yang, Buyun Ma
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Preoperative Risk Stratification of Follicular-patterned Thyroid Lesions on Core Needle Biopsy by Histologic Subtyping and RAS Variant-specific Immunohistochemistry
Meejeong Kim, Sora Jeon, Chan Kwon Jung
Endocrine Pathology.2023; 34(2): 247. 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
Reevaluating diagnostic categories and associated malignancy risks in thyroid core needle biopsy
Chan Kwon Jung
Journal of Pathology and Translational Medicine.2023; 57(4): 208. CrossRef
A Matched-Pair Analysis of Nuclear Morphologic Features Between Core Needle Biopsy and Surgical Specimen in Thyroid Tumors Using a Deep Learning Model
Faridul Haq, Andrey Bychkov, Chan Kwon Jung
Endocrine Pathology.2022; 33(4): 472. CrossRef

Thyroid
Whole-Exome Sequencing in Papillary Microcarcinoma: Potential Early Biomarkers of Lateral Lymph Node Metastasis: Mijin Kim, Chae Hwa Kwon, Min Hee Jang, Jeong Mi Kim, Eun Heui Kim, Yun Kyung Jeon, Sang Soo Kim, Kyung-Un Choi, In Joo Kim, Meeyoung Park, Bo Hyun Kim; Endocrinol Metab. 2021;36(5):1086-1094. Published online October 28, 2021; DOI: https://doi.org/10.3803/EnM.2021.1132

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Background
Early identification of patients with high-risk papillary thyroid microcarcinoma (PTMC) that is likely to progress has become a critical challenge. We aimed to identify somatic mutations associated with lateral neck lymph node (LN) metastasis (N1b) in patients with PTMC.
Methods
Whole-exome sequencing (WES) of 14 PTMCs with no LN metastasis (N0) and 13 N1b PTMCs was performed using primary tumors and matched normal thyroid tissues.
Results
The mutational burden was comparable in N0 and N1b tumors, as the median number of mutations was 23 (range, 12 to 46) in N0 and 24 (range, 12 to 50) in N1b PTMC (P=0.918). The most frequent mutations were detected in PGS1, SLC4A8, DAAM2, and HELZ in N1b PTMCs alone, and the K158Q mutation in PGS1 (four patients, Fisher’s exact test P=0.041) was significantly enriched in N1b PTMCs. Based on pathway analysis, somatic mutations belonging to the receptor tyrosine kinase-RAS and NOTCH pathways were most frequently affected in N1b PTMCs. We identified four mutations that are predicted to be pathogenic in four genes based on Clinvar and Combined Annotation-Dependent Depletion score: BRAF, USH2A, CFTR, and PHIP. A missense mutation in CFTR and a nonsense mutation in PHIP were detected in N1b PTMCs only, although in one case each. BRAF mutation was detected in both N0 and N1b PTMCs.
Conclusion
This first comprehensive WES analysis of the mutational landscape of N0 and N1b PTMCs identified pathogenic genes that affect biological functions associated with the aggressive phenotype of PTMC.

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Bobby White, Pawel Swietach
Pflügers Archiv - European Journal of Physiology.2024; 476(4): 673. CrossRef
Comprehensive Long-Read Sequencing Analysis Discloses the Transcriptome Features of Papillary Thyroid Microcarcinoma
Yanqiang Wang, Binbin Zou, Yanyan Zhang, Jin Zhang, Shujing Li, Bo Yu, Zhekun An, Lei Li, Siqian Cui, Yutong Zhang, Jiali Yao, Xiuzhi Shi, Jing Liu
The Journal of Clinical Endocrinology & Metabolism.2024; 109(5): 1263. CrossRef
Feasibility of whole‐exome sequencing in fine‐needle aspiration specimens of papillary thyroid microcarcinoma for the identification of novel gene mutations
Liyuan Ma, Luying Gao, Ya Hu, Xiaoyi Li, Chunhao Liu, Jiang Ji, Xinlong Shi, Aonan Pan, Yuang An, Nengwen Luo, Yu Xia, Yuxin Jiang
Clinical Genetics.2024; 105(5): 567. CrossRef
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Frontiers in Genetics.2023;[Epub] CrossRef

Thyroid
Lobeglitazone, A Peroxisome Proliferator-Activated Receptor-Gamma Agonist, Inhibits Papillary Thyroid Cancer Cell Migration and Invasion by Suppressing p38 MAPK Signaling Pathway: Jun-Qing Jin, Jeong-Sun Han, Jeonghoon Ha, Han-Sang Baek, Dong-Jun Lim; Endocrinol Metab. 2021;36(5):1095-1110. Published online October 14, 2021; DOI: https://doi.org/10.3803/EnM.2021.1155

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Background
Peroxisome proliferator-activated receptor-gamma (PPAR-γ) ligands have been widely shown to correlate with epithelial-mesenchymal transition (EMT) and cancer progression. Lobeglitazone (LGZ) is a novel ligand of PPAR-γ; and its role in EMT and metastasis in papillary thyroid carcinoma (PTC) is poorly understood. We aimed to investigate the role of LGZ in metastatic behavior of PTC cells.
Methods
Half maximal inhibitory concentration (IC₅₀) values of LGZ in BRAF-mutated PTC cell lines (BCPAP and K1) were determined using MTT assay. Rosiglitazone (RGZ), the PPAR-γ ligand was used as a positive control. The protein expression of PPAR-γ, cell-surface proteins (E-cadherin, N-cadherin), cytoskeletal protein (Vimentin), transcription factor (Snail), p38 mitogenactivated protein kinase (MAPK), extracellular signal-regulated kinase (ERK) 1/2 pathway, and matrix metalloproteinase (MMP)-2 expression were measured using Western blotting. Changes in E-cadherin expression were also determined using immunocytochemistry. Cell migration and invasion were analyzed using wound healing and Matrigel invasion assays.
Results
Treatment with LGZ or RGZ significantly inhibited transforming growth factor-beta1 (TGF-β1)-induced EMT-associated processes such as fibroblast-like morphological changes, EMT-related protein expression, and increased cell migration and invasion in BCPAP and K1 cells. LGZ restored TGF-β1-induced loss of E-cadherin, as observed using immunocytochemistry. Furthermore, LGZ and RGZ suppressed TGF-β1-induced MMP-2 expression and phosphorylation of p38 MAPK, but not ERK1/2. Although there was no change in PPAR-γ expression after treatment with LGZ or RGZ, the effect of downstream processes mediated by LGZ was hampered by GW9662, a PPAR-γ antagonist.
Conclusion
LGZ inhibits TGF-β1-induced EMT, migration, and invasion through the p38 MAPK signaling pathway in a PPAR-γ-dependent manner in PTC cells.

Citations

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Diabetes Mellitus and Thyroid Cancers: Risky Correlation, Underlying Mechanisms and Clinical Prevention
Rongqian Wu, Junping Zhang, Guilin Zou, Shanshan Li, Jinying Wang, Xiaoxinlei Li, Jixiong Xu
Diabetes, Metabolic Syndrome and Obesity.2024; Volume 17: 809. CrossRef
Clinicopathological Evaluation of Papillary Thyroid Microcarcinoma
Ando Takahito, Kimihito Fujii, Hirona Banno, Masayuki Saito, Yukie Ito, Mirai Ido, Manami Goto, Yukako Mouri, Junko Kousaka, Tsuneo Imai, Shogo Nakano
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Review Article

Thyroid
Active Surveillance as an Effective Management Option for Low-Risk Papillary Thyroid Microcarcinoma: Min Ji Jeon, Won Gu Kim, Tae Yong Kim, Young Kee Shong, Won Bae Kim; Endocrinol Metab. 2021;36(4):717-724. Published online August 11, 2021; DOI: https://doi.org/10.3803/EnM.2021.1042; Correction in: Endocrinol Metab 2022;37(1):180

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Active surveillance (AS) for low-risk papillary thyroid microcarcinoma (PTMC) has been accepted worldwide as safe and effective. Despite the growing acceptance of AS in the management of low-risk PTMCs, there are barriers to AS in real clinical settings, and it is important to understand and establish appropriate AS protocol from initial evaluation to follow-up. PTMC management strategies should be decided upon after careful consideration of patient and tumor characteristics by a multidisciplinary team of thyroid cancer specialists. Patients should understand the risks and benefits of AS, participate in decision-making and follow structured monitoring strategies. In this review, we discuss clinical outcomes of AS from previous studies, optimal indications and follow-up strategies for AS, and unresolved questions about AS.

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Serum thyroglobulin testing after thyroid lobectomy in patients with 1–4 cm papillary thyroid carcinoma
Ahreum Jang, Meihua Jin, Chae A Kim, Min Ji Jeon, Yu-Mi Lee, Tae-Yon Sung, Tae Yong Kim, Won Bae Kim, Young Kee Shong, Won Gu Kim
Endocrine.2023; 81(2): 290. CrossRef
Papillary Thyroid Microcarcinoma: Active Surveillance Against Surgery. Considerations of an Italian Working Group From a Systematic Review
Giuseppina Orlando, Gregorio Scerrino, Alessandro Corigliano, Irene Vitale, Roberta Tutino, Stefano Radellini, Francesco Cupido, Giuseppa Graceffa, Gianfranco Cocorullo, Giuseppe Salamone, Giuseppina Melfa
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Prognosis of Patients with 1–4 cm Papillary Thyroid Cancer Who Underwent Lobectomy: Focus on Gross Extrathyroidal Extension Invading Only the Strap Muscles
Ahreum Jang, Meihua Jin, Won Woong Kim, Min Ji Jeon, Tae-Yon Sung, Dong Eun Song, Tae Yong Kim, Ki-Wook Chung, Won Bae Kim, Young Kee Shong, Yu-Mi Lee, Won Gu Kim
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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.

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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

Thyroid
Evaluation of Iodine Status among Korean Patients with Papillary Thyroid Cancer Using Dietary and Urinary Iodine: Ji Yeon Choi, Joon-Hyop Lee, YoonJu Song; Endocrinol Metab. 2021;36(3):607-618. Published online June 21, 2021; DOI: https://doi.org/10.3803/EnM.2021.1005

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Background
Concerns have been raised regarding thyroid disorders caused by excessive iodine in Koreans, who have iodine-rich diets. This study evaluated iodine status using dietary iodine intake and urinary iodine in papillary thyroid cancer (PTC) patients.
Methods
Dietary data of PTC patients were assessed using a 24-hour recall and food frequency questionnaire (FFQ), and urinary iodine concentrations (UICs) were also obtained. To compare the iodine status of PTC patients, Korean adults with or without thyroid disease from the Korea National Health and Nutrition Examination Survey, which had 24-hour recall data and urinary iodine measurements, were analyzed.
Results
The median daily iodine intake by 24-hour recall was 341.7 μg/day in PTC patients, similar to the levels of other Korean adults. Based on UICs, the prevalence of excessive iodine was 54.4% in PTC patients, which was similar to the prevalence among subjects with thyroid disease (55.4%) but slightly higher than that in subjects without thyroid disease (47.7%). Based on dietary iodine by 24-hour recall, the prevalence of excessive iodine intake was 7.2%, which was higher than that among subjects with (4.4%) or without (3.9%) thyroid disease. The dietary iodine intake based on 24-hour recall was closely correlated with the UIC (r=0.4826) in PTC patients, but dietary iodine by FFQ was not significantly correlated with either 24-hour recall or UIC-based dietary iodine.
Conclusion
Excessive iodine intake was more common in PTC patients than in subjects without thyroid disease. Further longitudinal research is necessary to elucidate the role of dietary iodine in PTC.

Citations

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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
Effect of iodine restriction on short-term changes in thyroid function in patients with subclinical hypothyroidism
Obin Kwon, Dong Yeob Shin, Eun Jig Lee
Journal of Nutrition and Health.2022; 55(2): 250. CrossRef
Iodine nutrition and papillary thyroid cancer
Xueqi Zhang, Fan Zhang, Qiuxian Li, Chuyao Feng, Weiping Teng
Frontiers in Nutrition.2022;[Epub] CrossRef

Thyroid
Clinicopathological Characteristics and Recurrence-Free Survival of Rare Variants of Papillary Thyroid Carcinomas in Korea: A Retrospective Study: Mijin Kim, Sun Wook Cho, Young Joo Park, Hwa Young Ahn, Hee Sung Kim, Yong Joon Suh, Dughyun Choi, Bu Kyung Kim, Go Eun Yang, Il-Seok Park, Ka Hee Yi, Chan Kwon Jung, Bo Hyun Kim; Endocrinol Metab. 2021;36(3):619-627. Published online June 10, 2021; DOI: https://doi.org/10.3803/EnM.2021.974

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Background
We aimed to evaluate the clinicopathological features and biological behaviors of Korean thyroid cancer patients with rare variants of papillary thyroid carcinoma (PTC) to address the ambiguity regarding the prognostic consequences of these variants.
Methods
We retrospectively reviewed the medical records of 5,496 patients who underwent thyroid surgery for PTC, between January and December 2012, in nine tertiary hospitals. Rare PTC variants included tall cell (TCV), columnar cell (CCV), diffuse sclerosing (DSV), cribriform-morular (CMV), solid (SV), hobnail, and Warthin-like variants. Recurrence-free survival (RFS) was defined as the time from the date of thyroidectomy until recurrence.
Results
Rare variants accounted for 1.1% (n=63) of the PTC patients; with 0.9% TCV, 0.02% CCV, 0.1% DSV, 0.1% CMV, and 0.1% SV. The mean age of patients and primary tumor size were 42.1±13.1 years and 1.3±0.9 cm, respectively. Extrathyroidal extension and cervical lymph node metastasis were observed in 38 (60.3%) and 37 (58.7%) patients, respectively. Ultrasonographic findings revealed typical malignant features in most cases. During a median follow-up of 7 years, 6.3% of patients experienced a locoregional recurrence. The 5-year RFS rates were 71.4% in patients with DSV or SV, 95.9% for TCV, or CCV, and 100% for other variants. DSV emerged an independent risk factor associated with shorter RFS.
Conclusion
In this multicenter Korean cohort, rare variants accounted for 1.1% of all PTC cases, with TCV being the most frequent subtype. DSV emerged as a significant prognostic factor for RFS.

Citations

Citations to this article as recorded by

Serum thyroglobulin testing after thyroid lobectomy in patients with 1–4 cm papillary thyroid carcinoma
Ahreum Jang, Meihua Jin, Chae A Kim, Min Ji Jeon, Yu-Mi Lee, Tae-Yon Sung, Tae Yong Kim, Won Bae Kim, Young Kee Shong, Won Gu Kim
Endocrine.2023; 81(2): 290. CrossRef
Do Histologically Aggressive Subtypes of Papillary Thyroid Microcarcinoma have Worse Clinical Outcome than Non-Aggressive Papillary Thyroid Microcarcinoma Subtypes? A Multicenter Cohort Study
Sayid Shafi Zuhur, Hunkar Aggul, Ugur Avci, Selvinaz Erol, Mazhar Müslüm Tuna, Serhat Uysal, Gulhan Akbaba, Faruk Kilinç, Merve Catak, Sakin Tekin, Ogun Irem Bilen, Beyza Olcay Öztürk, Ecem Bilgehan Erden, Gulsah Elbuken, Halise Cinar Yavuz, Pinar Kadiogl
Hormone and Metabolic Research.2023; 55(05): 323. CrossRef
The Warthin-like variant of papillary thyroid carcinomas: a clinicopathologic analysis report of two cases
Xing Zhao, Yijia Zhang, Pengyu Hao, Mingzhen Zhao, Xingbin Shen
Oncologie.2023; 25(5): 581. CrossRef
A Retrospective Cohort Study with Validation of Predictors of Differentiated Thyroid Cancer Outcomes
Ayanthi Wijewardene, Anthony J. Gill, Matti Gild, Diana L. Learoyd, Anthony Robert Glover, Mark Sywak, Stan Sidhu, Paul Roach, Geoffrey Schembri, Jeremy Hoang, Bruce Robinson, Lyndal Tacon, Roderick Clifton-Bligh
Thyroid.2022;[Epub] CrossRef
Clinicopathological Implications of the BRAFV600E Mutation in Papillary Thyroid Carcinoma of Ukrainian Patients Exposed to the Chernobyl Radiation in Childhood: A Study for 30 Years After the Accident
Liudmyla Zurnadzhy, Tetiana Bogdanova, Tatiana I. Rogounovitch, Masahiro Ito, Mykola Tronko, Shunichi Yamashita, Norisato Mitsutake, Michael Bolgov, Serhii Chernyshov, Sergii Masiuk, Vladimir A. Saenko
Frontiers in Medicine.2022;[Epub] CrossRef

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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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

Citations to this article as recorded by

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
Endocrinology and Metabolism.2024; 39(1): 47. CrossRef
It Is Time to Understand the Additional Benefits of Active Surveillance for Low-Risk Papillary Thyroid Carcinoma
Kyeong Jin Kim
Endocrinology and Metabolism.2024; 39(1): 95. CrossRef
Active Surveillance for Low-Risk Papillary Thyroid Carcinoma as an Acceptable Management Option with Additional Benefits: A Comprehensive Systematic Review
Jee Hee Yoon, Wonsuk Choi, Ji Yong Park, A Ram Hong, Hee Kyung Kim, Ho-Cheol Kang
Endocrinology and Metabolism.2024; 39(1): 152. CrossRef
Active Surveillance for Low-Risk Papillary Thyroid Carcinoma as an Acceptable Management Option with Additional Benefits: A Comprehensive Systematic Review
Jee Hee Yoon, Wonsuk Choi, Ji Yong Park, A Ram Hong, Hee Kyung Kim, Ho-Cheol Kang
Endocrinology and Metabolism.2024; 39(1): 152. CrossRef
Thyroid‐Stimulating Hormone, Age, and Tumor Size are Risk Factors for Progression During Active Surveillance of Low‐Risk Papillary Thyroid Microcarcinoma in Adults
Yasuhiro Ito, Akira Miyauchi, Makoto Fujishima, Takuya Noda, Tsutomu Sano, Takahiro Sasaki, Taketoshi Kishi, Tomohiko Nakamura
World Journal of Surgery.2023; 47(2): 392. CrossRef
Thyroid FNA cytology: The Eastern versus Western perspectives
Mitsuyoshi Hirokawa, Manon Auger, Chan Kwon Jung, Fabiano Mesquita Callegari
Cancer Cytopathology.2023; 131(7): 415. CrossRef
To Screen or Not to Screen?
Do Joon Park
Endocrinology and Metabolism.2023; 38(1): 69. CrossRef
Lower Thyroid Cancer Mortality in Patients Detected by Screening: A Meta-Analysis
Shinje Moon, Young Shin Song, Kyong Yeun Jung, Eun Kyung Lee, Young Joo Park
Endocrinology and Metabolism.2023; 38(1): 93. CrossRef
Long-Term Outcomes of Active Surveillance and Immediate Surgery for Adult Patients with Low-Risk Papillary Thyroid Microcarcinoma: 30-Year Experience
Akira Miyauchi, Yasuhiro Ito, Makoto Fujishima, Akihiro Miya, Naoyoshi Onoda, Minoru Kihara, Takuya Higashiyama, Hiroo Masuoka, Shiori Kawano, Takahiro Sasaki, Mitsushige Nishikawa, Shuji Fukata, Takashi Akamizu, Mitsuru Ito, Eijun Nishihara, Mako Hisakad
Thyroid®.2023; 33(7): 817. CrossRef
Active Surveillance Outcomes of Patients with Low-Risk Papillary Thyroid Microcarcinoma According to Levothyroxine Treatment Status
Masashi Yamamoto, Akira Miyauchi, Yasuhiro Ito, Makoto Fujishima, Takahiro Sasaki, Takumi Kudo
Thyroid®.2023; 33(10): 1182. CrossRef
Cost-Effectiveness of Active Surveillance Compared to Early Surgery of Small Papillary Thyroid Cancer: A Retrospective Study on a Korean Population
Han-Sang Baek, Jeonghoon Ha, Kwangsoon Kim, Jaseong Bae, Jeong Soo Kim, Sungju Kim, Dong-Jun Lim, Chulmin Kim
Journal of Korean Medical Science.2023;[Epub] CrossRef
Optimal Cutoff Values of the Contact Angle of Tumor on Sonography System for Predicting Extrathyroidal Extension of Papillary Thyroid Carcinoma by Tumor Location
Ik Beom Shin, Do Hoon Koo, Dong Sik Bae
Clinical Medicine Insights: Oncology.2023;[Epub] CrossRef
Thermal ablation for papillary thyroid microcarcinoma located in the isthmus: a study with 3 years of follow-up
Lin Zheng, Fang-yi Liu, Jie Yu, Zhi-gang Cheng, Xiao-ling Yu, Xiao-cong Dong, Zhi-yu Han, Ping Liang
Future Oncology.2022; 18(4): 471. CrossRef
Trends in the Management of Localized Papillary Thyroid Carcinoma in the United States (2000–2018)
Elisa Pasqual, Julie Ann Sosa, Yingxi Chen, Sara J. Schonfeld, Amy Berrington de González, Cari M. Kitahara
Thyroid.2022; 32(4): 397. CrossRef
Management of Low-Risk Thyroid Cancers: Is Active Surveillance a Valid Option? A Systematic Review of the Literature
Renato Patrone, Nunzio Velotti, Stefania Masone, Alessandra Conzo, Luigi Flagiello, Chiara Cacciatore, Marco Filardo, Vincenza Granata, Francesco Izzo, Domenico Testa, Stefano Avenia, Alessandro Sanguinetti, Andrea Polistena, Giovanni Conzo
Journal of Clinical Medicine.2021; 10(16): 3569. CrossRef
Cost-Effectiveness Analysis of Active Surveillance Compared to Early Surgery in Small Papillary Thyroid Cancer: A Systemic Review
Han-sang Baek, Chai-ho Jeong, Jeonghoon Ha, Ja-Seong Bae, Jeong-soo Kim, Dong-Jun Lim, Chul-Min Kim
Cancer Management and Research.2021; Volume 13: 6721. CrossRef
Active Surveillance as an Effective Management Option for Low-Risk Papillary Thyroid Microcarcinoma
Min Ji Jeon, Won Gu Kim, Tae Yong Kim, Young Kee Shong, Won Bae Kim
Endocrinology and Metabolism.2021; 36(4): 717. CrossRef

Clinical Study
Molecular Correlates and Nuclear Features of Encapsulated Follicular-Patterned Thyroid Neoplasms: Chan Kwon Jung, Andrey Bychkov, Dong Eun Song, Jang-Hee Kim, Yun Zhu, Zhiyan Liu, Somboon Keelawat, Chiung-Ru Lai, Mitsuyoshi Hirokawa, Kaori Kameyama, Kennichi Kakudo; Endocrinol Metab. 2021;36(1):123-133. Published online February 24, 2021; DOI: https://doi.org/10.3803/EnM.2020.860

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Background
Assessing nuclear features is diagnostically challenging in the aspect of thyroid pathology. The aim of this study was to determine whether pathologists could distinguish BRAF-like and RAS-like nuclear features morphologically and identify morphological features to differentiate thyroid tumors with RAS-like mutations from encapsulated papillary thyroid carcinoma (PTC) with predominant follicular growth and BRAFV^600E mutation.
Methods
Representative whole slide images of 16 encapsulated thyroid tumors with predominant follicular growth were reviewed by 12 thyroid pathologists using a web browser-based image viewer. Total nuclear score was calculated from semi-quantitatively scored eight nuclear features. The molecular profile of RAS and BRAF genes was determined by Sanger sequencing.
Results
Total nuclear score ranging 0 to 24 could differentiate BRAF-like tumors from RAS-like tumors with a cut-off value of score 14. The interobserver agreement was the highest for the assessment of nuclear pseudoinclusions (NPIs) but the lowest for nuclear elongation and sickle-shaped nuclei. NPIs were found in tumors with BRAFV^600E mutation, but not in tumors with RAS-like mutations. Total nuclear scores were significantly higher for tumors with BRAFV^600E than for those with RAS-like mutations (P<0.001).
Conclusion
Our results suggest that NPIs and high nuclear scores have diagnostic utility as rule-in markers for differentiating PTC with BRAFV^600E mutation from benign or borderline follicular tumors with RAS-like mutations. Relaxation of rigid criteria for nuclear features resulted in an overdiagnosis of PTC. Immunostaining or molecular testing for BRAFV^600E mutation is a useful adjunct for cases with high nuclear scores to identify true PTC.

Citations

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Differentiating BRAF V600E- and RAS-like alterations in encapsulated follicular patterned tumors through histologic features: a validation study
Chankyung Kim, Shipra Agarwal, Andrey Bychkov, Jen-Fan Hang, Agnes Stephanie Harahap, Mitsuyoshi Hirokawa, Kennichi Kakudo, Somboon Keelawat, Chih-Yi Liu, Zhiyan Liu, Truong Phan-Xuan Nguyen, Chanchal Rana, Huy Gia Vuong, Yun Zhu, Chan Kwon Jung
Virchows Archiv.2024;[Epub] CrossRef
The Presence of Typical “BRAFV600E-Like” Atypia in Papillary Thyroid Carcinoma is Highly Specific for the Presence of the BRAFV600E Mutation
John Turchini, Loretta Sioson, Adele Clarkson, Amy Sheen, Leigh Delbridge, Anthony Glover, Mark Sywak, Stan Sidhu, Anthony J. Gill
Endocrine Pathology.2023; 34(1): 112. CrossRef
Could Oxidative Stress Play a Role in the Development and Clinical Management of Differentiated Thyroid Cancer?
Maria Kościuszko, Angelika Buczyńska, Adam Jacek Krętowski, Anna Popławska-Kita
Cancers.2023; 15(12): 3182. CrossRef
Pitfalls in thyroid pathology and the medicolegal aspects of error
David N Poller
Diagnostic Histopathology.2023; 29(11): 495. CrossRef
Developing Models to Predict BRAFV600E and RAS Mutational Status in Papillary Thyroid Carcinoma Using Clinicopathological Features and pERK1/2 Immunohistochemistry Expression
Agnes Stephanie Harahap, Imam Subekti, Sonar Soni Panigoro, Asmarinah, Lisnawati, Retno Asti Werdhani, Hasrayati Agustina, Dina Khoirunnisa, Mutiah Mutmainnah, Fajar Lamhot Gultom, Abdillah Hasbi Assadyk, Maria Francisca Ham
Biomedicines.2023; 11(10): 2803. CrossRef
The Asian Thyroid Working Group, from 2017 to 2023
Kennichi Kakudo, Chan Kwon Jung, Zhiyan Liu, Mitsuyoshi Hirokawa, Andrey Bychkov, Huy Gia Vuong, Somboon Keelawat, Radhika Srinivasan, Jen-Fan Hang, Chiung-Ru Lai
Journal of Pathology and Translational Medicine.2023; 57(6): 289. CrossRef
Noninvasive Follicular Thyroid Neoplasm with Papillary-like Nuclear Features (NIFTP): Tumour Entity with a Short History. A Review on Challenges in Our Microscopes, Molecular and Ultrasonographic Profile
Ivana Kholová, Elina Haaga, Jaroslav Ludvik, David Kalfert, Marie Ludvikova
Diagnostics.2022; 12(2): 250. CrossRef
Update from the 2022 World Health Organization Classification of Thyroid Tumors: A Standardized Diagnostic Approach
Chan Kwon Jung, Andrey Bychkov, Kennichi Kakudo
Endocrinology and Metabolism.2022; 37(5): 703. CrossRef
Different Threshold of Malignancy for RAS-like Thyroid Tumors Causes Significant Differences in Thyroid Nodule Practice
Kennichi Kakudo
Cancers.2022; 14(3): 812. CrossRef
The Incidence of Noninvasive Follicular Thyroid Neoplasm with Papillary-Like Nuclear Features: A Meta-Analysis Assessing Worldwide Impact of the Reclassification
Chanchal Rana, Huy Gia Vuong, Thu Quynh Nguyen, Hoang Cong Nguyen, Chan Kwon Jung, Kennichi Kakudo, Andrey Bychkov
Thyroid.2021;[Epub] CrossRef

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