Endocrinology and Metabolism

Chan Kwon Jung (Jung CK)

11 Articles

Thyroid
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; Endocrinol Metab. 2022;37(6):947-948. Published online November 10, 2022; DOI: https://doi.org/10.3803/EnM.2022.1596

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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
Update from the 2022 World Health Organization Classification of Thyroid Tumors: A Standardized Diagnostic Approach: Chan Kwon Jung, Andrey Bychkov, Kennichi Kakudo; Endocrinol Metab. 2022;37(5):703-718. Published online October 4, 2022; DOI: https://doi.org/10.3803/EnM.2022.1553

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The fifth edition of the World Health Organization (WHO) histologic classification of thyroid neoplasms released in 2022 includes newly recognized tumor types, subtypes, and a grading system. Follicular cell-derived neoplasms are categorized into three families (classes): benign tumors, low-risk neoplasms, and malignant neoplasms. The terms “follicular nodular disease” and “differentiated high-grade thyroid carcinoma” are introduced to account for multifocal hyperplastic/neoplastic lesions and differentiated thyroid carcinomas with high-grade features, respectively. The term “Hürthle cells” is replaced with “oncocytic cells.” Invasive encapsulated follicular and cribriform morular variants of papillary thyroid carcinoma (PTC) are now redefined as distinct tumor types, given their different genetic alterations and clinicopathologic characteristics from other PTC subtypes. The term “variant” to describe a subclass of tumor has been replaced with the term “subtype.” Instead, the term “variant” is reserved to describe genetic alterations. A histologic grading system based on the mitotic count, necrosis, and/or the Ki67 index is used to identify high-grade follicular-cell derived carcinomas and medullary thyroid carcinomas. The 2022 WHO classification introduces the following new categories: “salivary gland-type carcinomas of the thyroid” and “thyroid tumors of uncertain histogenesis.” This review summarizes the major changes in the 2022 WHO classification and their clinical relevance.

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Update on C-Cell Neuroendocrine Neoplasm: Prognostic and Predictive Histopathologic and Molecular Features of Medullary Thyroid Carcinoma
Chan Kwon Jung, Shipra Agarwal, Jen-Fan Hang, Dong-Jun Lim, Andrey Bychkov, Ozgur Mete
Endocrine Pathology.2023; 34(1): 1. CrossRef
The 5th edition of WHO classification of tumors of endocrine organs: changes in the diagnosis of follicular-derived thyroid carcinoma
Fulvio Basolo, Elisabetta Macerola, Anello Marcello Poma, Liborio Torregrossa
Endocrine.2023; 80(3): 470. CrossRef
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
Ultrasound evolution of parenchymal changes in the thyroid gland with autoimmune thyroiditis in children prior to the development of papillary thyroid carcinoma – a follow-up study
Dominika Januś, Monika Kujdowicz, Małgorzata Wójcik, Anna Taczanowska-Niemczuk, Aleksandra Kiszka-Wiłkojć, Wojciech Górecki, Jerzy B. Starzyk
Frontiers in Endocrinology.2023;[Epub] CrossRef
Papillary thyroid carcinoma with aggressive fused follicular and solid growth pattern: A unique histological subtype with high‐grade malignancy?
Shin‐ichi Murata, Ibu Matsuzaki, Mitsuo Kishimoto, Naomi Katsuki, Toshinori Onishi, Mitsuyoshi Hirokawa, Fumiyoshi Kojima
Pathology International.2023; 73(5): 207. CrossRef
Multi-Omics and Management of Follicular Carcinoma of the Thyroid
Thifhelimbilu Emmanuel Luvhengo, Ifongo Bombil, Arian Mokhtari, Maeyane Stephens Moeng, Demetra Demetriou, Claire Sanders, Zodwa Dlamini
Biomedicines.2023; 11(4): 1217. CrossRef
Molecular Genetics of Diffuse Sclerosing Papillary Thyroid Cancer
Meshael Alswailem, Balgees Alghamdi, Anwar Alotaibi, Abeer Aljomiah, Hindi Al-Hindi, Avaniyapuram Kannan Murugan, Mohamed Abouelhoda, Yufei Shi, Ali S Alzahrani
The Journal of Clinical Endocrinology & Metabolism.2023; 108(9): e704. CrossRef
Multifunctional Phase-Transition Nanoparticles for Effective Targeted Sonodynamic-Gene Therapy Against Thyroid Papillary Carcinoma
Shihui Guan, Dengke Teng, Hui Wang, Qimeihui Wang, Xi Zhen, Guoqing Sui, Yang Wang, Lingyu Zhu, Yuanqiang Lin, Dan Jiao, Feng Guo
International Journal of Nanomedicine.2023; Volume 18: 2275. CrossRef
Utilizing Dynamic Risk Stratification in Patients With Tall Cell Variant Papillary Thyroid Cancer
David Zimmer, Gilman Plitt, Brandon Prendes, Jamie Ku, Natalie Silver, Eric Lamarre, Emrullah Yilmaz, Jessica Geiger, Christian Nasr, Lea El Hage, Mario Skugor, Shauna Cambpell, Shlomo Koyfman, Jacob Miller, Neil Woody, Katherine Heiden, Nikhil Joshi, Tar
The Laryngoscope.2023; 133(9): 2430. CrossRef
Ultrasound, laboratory and histopathological insights in diagnosing papillary thyroid carcinoma in a paediatric population: a single centre follow-up study between 2000-2022
Dominika Januś, Małgorzata Wójcik, Anna Taczanowska-Niemczuk, Aleksandra Kiszka-Wiłkojć, Monika Kujdowicz, Małgorzata Czogała, Wojciech Górecki, Jerzy B. Starzyk
Frontiers in Endocrinology.2023;[Epub] CrossRef
Medullary Thyroid Carcinoma: A Single Institute Experience
Sonal Trivedi, T. Salahuddin, Mohamed Taher Mithi, Priyank Rathod, Arpit Bandi, Shashank J. Pandya, Mohit Sharma, Shailesh Patel, Vikas Warikoo, Ketul Puj, Abhijeet Salunkhe, Keval Patel, Shivam Pandya
Indian Journal of Otolaryngology and Head & Neck Surgery.2023; 75(4): 2884. CrossRef
FNAC (Fine needle aspiration cytology) and histopathological correlation and reclassification of thyroid neoplasm in accordance with WHO classification 2022
Fareeda Joshi, Shreya Hegde
Indian Journal of Pathology and Oncology.2023; 10(2): 132. CrossRef
Papillary thyroid carcinoma associated with non‑functioning parathyroid carcinoma with Warthin's tumor of the parotid gland: A case report and brief literature review
Ari Abdullah, Aras Qaradakhy, Yadgar Saeed, Abdulwahid Salih, Seema Karim, Osama Ali, Shko Hassan, Shalaw Nasraldeen, Shvan Mohammed, Fahmi Kakamad
Medicine International.2023;[Epub] CrossRef
Warthin-like papillary thyroid carcinoma: a case report and comprehensive review of the literature
Abdel Mouhaymen Missaoui, Fatma Hamza, Wafa Belabed, Manel Mellouli, Mohamed Maaloul, Slim Charfi, Issam Jardak, Tahya Sellami-Boudawara, Nabila Rekik, Mohamed Abid
Frontiers in Endocrinology.2023;[Epub] 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
Cancer Predisposition Syndromes and Thyroid Cancer: Keys for a Short Two-Way Street
Ioana Balinisteanu, Monica-Cristina Panzaru, Lavinia Caba, Maria-Christina Ungureanu, Andreea Florea, Ana Maria Grigore, Eusebiu Vlad Gorduza
Biomedicines.2023; 11(8): 2143. CrossRef
Deep learning prediction model for central lymph node metastasis in papillary thyroid microcarcinoma based on cytology
Wenhao Ren, Yanli Zhu, Qian Wang, Yuntao Song, Zhihui Fan, Yanhua Bai, Dongmei Lin
Cancer Science.2023; 114(10): 4114. CrossRef
Cytology and Histology of Thyroid Nodules: Exploring Novel Insights in the Molecular Era for Enhanced Patient Management
Beatrix Cochand-Priollet, Zahra Maleki
Current Oncology.2023; 30(8): 7753. CrossRef
Agrin is a novel oncogenic protein in thyroid cancer
Anna Adamiok‑Ostrowska, Małgorzata Grzanka, Barbara Czarnocka
Oncology Letters.2023;[Epub] CrossRef
Analysis of Pathological Features of Thyroid Carcinoma in the Western Yunnan
身吾王
Advances in Clinical Medicine.2023; 13(10): 15820. CrossRef
Insight of novel biomarkers for papillary thyroid carcinoma through multiomics
Wei Liu, Junkan Zhu, Zhen Wu, Yongxiang Yin, Qiao Wu, Yiming Wu, Jiaojiao Zheng, Cong Wang, Hongyan Chen, Talal Jamil Qazi, Jun Wu, Yuqing Zhang, Houbao Liu, Jingmin Yang, Daru Lu, Xumin Zhang, Zhilong Ai
Frontiers in Oncology.2023;[Epub] CrossRef
Identification of NIFTP-Specific mRNA Markers for Reliable Molecular Diagnosis of Thyroid Tumors
So-Yeon Lee, Jong-Lyul Park, Kwangsoon Kim, Ja Seong Bae, Jae-Yoon Kim, Seon-Young Kim, Chan Kwon Jung
Endocrine Pathology.2023; 34(3): 311. CrossRef
Somatostatin Receptor Type 2 and Thyroid-Stimulating Hormone Receptor Expression in Oncocytic Thyroid Neoplasms: Implications for Prognosis and Treatment
Andrea Gillis, Rui Zheng-Pywell, Chandler McLeod, Dezhi Wang, John M. Ness, Rachael Guenter, Jason Whitt, Tomas A. Prolla, Herbert Chen, Manuel Lora Gonzalez, Bart Rose, Ricardo V. Lloyd, Renata Jaskula-Sztul, Diana Lin
Modern Pathology.2023; 36(12): 100332. CrossRef
Comparison of Treatment and Prognosis Between Follicular Variant Papillary Thyroid Carcinoma and Classical Papillary Thyroid Carcinoma
Bing Zhang, Wenming Wu, Jinjing Liu, Zhou Liang, Liang Zong
Hormone and Metabolic Research.2023; 55(12): 855. CrossRef
Sentinel lymph node mapping: current applications and future perspectives in thyroid carcinoma
Isabella Merante Boschin, Loris Bertazza, Carla Scaroni, Caterina Mian, Maria Rosa Pelizzo
Frontiers in Medicine.2023;[Epub] CrossRef
Utility of the Growth Differentiation Factor-15 in the Differential Diagnosis of Follicular-Patterned Lesions of the Thyroid on Cytopathologic and Histopathologic Samples
Prasanna V Perumal, Neelaiah Siddaraju, Sunil K Saxena, Soundravally Rajendiran, Ramachandra V Bhat
Cureus.2023;[Epub] CrossRef
Tumeurs de la thyroïde : nouveautés de la classification OMS 2022
Serge Guyétant, Myriam Decaussin Petrucci, Emmanuelle Leteurtre
Annales de Pathologie.2023;[Epub] CrossRef
Investigation of pre‐operative demographic, biochemical, sonographic and cytopathological findings in low‐risk thyroid neoplasms
Muzaffer Serdar Deniz, Didem Özdemir, Narin Nasıroğlu İmga, Hüsniye Başer, Fatma Neslihan Çuhacı Seyrek, Ayşegül Aksoy Altınboğa, Oya Topaloğlu, Reyhan Ersoy, Bekir Çakır
Clinical Endocrinology.2023; 99(5): 502. CrossRef
Applications of machine and deep learning to thyroid cytology and histopathology: a review
Greg Slabaugh, Luis Beltran, Hasan Rizvi, Panos Deloukas, Eirini Marouli
Frontiers in Oncology.2023;[Epub] 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
Anaplastic thyroid cancer: Pathogenesis, prognostic factors and genetic landscape (Review)
Abdul-Mohsen Alhejaily, Omar Alhuzim, Yazeed Alwelaie
Molecular and Clinical Oncology.2023;[Epub] CrossRef
Simultaneous Occurrence of Medullary Thyroid Carcinoma and Papillary Thyroid Carcinoma: A Case Series with Literature Review
Poupak Fallahi, Armando Patrizio, Giulio Stoppini, Giusy Elia, Francesca Ragusa, Sabrina Rosaria Paparo, Eugenia Balestri, Valeria Mazzi, Chiara Botrini, Gilda Varricchi, Salvatore Ulisse, Marco Ghionzoli, Alessandro Antonelli, Silvia Martina Ferrari
Current Oncology.2023; 30(12): 10237. CrossRef
Reprogramming of Cellular Metabolism and Its Therapeutic Applications in Thyroid Cancer
Yuji Nagayama, Koichiro Hamada
Metabolites.2022; 12(12): 1214. CrossRef
Developments to improve outcomes in thyroid surgery
Thomas J. Musholt
Innovative Surgical Sciences.2022; 7(3-4): 77. CrossRef
The relationship of the clinicopathological characteristics and treatment results of post-Chornobyl papillary thyroid microcarcinomas with the latency period and radiation exposure
Tetiana Bogdanova, Serhii Chernyshov, Liudmyla Zurnadzhy, Tatiana I. Rogounovitch, Norisato Mitsutake, Mykola Tronko, Masahiro Ito, Michael Bolgov, Sergii Masiuk, Shunichi Yamashita, Vladimir A. Saenko
Frontiers in Endocrinology.2022;[Epub] CrossRef

Thyroid
Re-Increasing Trends in Thyroid Cancer Incidence after a Short Period of Decrease in Korea: Reigniting the Debate on Ultrasound Screening: Chan Kwon Jung, Ja Seong Bae, Young Joo Park; Endocrinol Metab. 2022;37(5):816-818. Published online October 11, 2022; DOI: https://doi.org/10.3803/EnM.2022.1586

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Survival Comparison of Incidentally Found versus Clinically Detected Thyroid Cancers: An Analysis of a Nationwide Cohort Study
Shinje Moon, Eun Kyung Lee, Hoonsung Choi, Sue K. Park, Young Joo Park
Endocrinology and Metabolism.2023; 38(1): 81. CrossRef
Cumulative exposure to metabolic syndrome increases thyroid cancer risk in young adults: a population-based cohort study
Jinyoung Kim, Kyungdo Han, Mee Kyoung Kim, Ki-Hyun Baek, Ki-Ho Song, Hyuk-Sang Kwon
The Korean Journal of Internal Medicine.2023; 38(4): 526. 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

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.

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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
Examining the impact of several factors including COVID‐19 on thyroid fine‐needle aspiration biopsy
Muzaffer Serdar Deniz, Merve Dindar
Diagnostic Cytopathology.2023;[Epub] 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
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.

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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
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

Adrenal gland
Diagnosis for Pheochromocytoma and Paraganglioma: A Joint Position Statement of the Korean Pheochromocytoma and Paraganglioma Task Force: Eu Jeong Ku, Kyoung Jin Kim, Jung Hee Kim, Mi Kyung Kim, Chang Ho Ahn, Kyung Ae Lee, Seung Hun Lee, You-Bin Lee, Kyeong Hye Park, Yun Mi Choi, Namki Hong, A Ram Hong, Sang-Wook Kang, Byung Kwan Park, Moon-Woo Seong, Myungshin Kim, Kyeong Cheon Jung, Chan Kwon Jung, Young Seok Cho, Jin Chul Paeng, Jae Hyeon Kim, Ohk-Hyun Ryu, Yumie Rhee, Chong Hwa Kim, Eun Jig Lee; Endocrinol Metab. 2021;36(2):322-338. Published online April 6, 2021; DOI: https://doi.org/10.3803/EnM.2020.908

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Pheochromocytoma and paraganglioma (PPGLs) are rare catecholamine-secreting neuroendocrine tumors but can be life-threatening. Although most PPGLs are benign, approximately 10% have metastatic potential. Approximately 40% cases are reported as harboring germline mutations. Therefore, timely and accurate diagnosis of PPGLs is crucial. For more than 130 years, clinical, molecular, biochemical, radiological, and pathological investigations have been rapidly advanced in the field of PPGLs. However, performing diagnostic studies to localize lesions and detect metastatic potential can be still challenging and complicated. Furthermore, great progress on genetics has shifted the paradigm of genetic testing of PPGLs. The Korean PPGL task force team consisting of the Korean Endocrine Society, the Korean Surgical Society, the Korean Society of Nuclear Medicine, the Korean Society of Pathologists, and the Korean Society of Laboratory Medicine has developed this position statement focusing on the comprehensive and updated diagnosis for PPGLs.

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Evaluation and Management of Bone Health in Patients with Thyroid Diseases: A Position Statement of the Korean Thyroid Association
A Ram Hong, Ho-Cheol Kang
Endocrinology and Metabolism.2023; 38(2): 175. CrossRef
Lesion-based indicators predict long-term outcomes of pheochromocytoma and paraganglioma– SIZEPASS
Helena Hanschell, Salvador Diaz-Cano, Alfredo Blanes, Nadia Talat, Gabriele Galatá, Simon Aylwin, Klaus Martin Schulte
Frontiers in Endocrinology.2023;[Epub] CrossRef
Interleukin-6-producing paraganglioma as a rare cause of systemic inflammatory response syndrome: a case report
Yin Young Lee, Seung Min Chung
Journal of Yeungnam Medical Science.2023; 40(4): 435. CrossRef
(Extremely rare intrapericardial location of paraganglioma)
Jaroslav Zajíc, Aleš Mokráček, Ladislav Pešl, Jiří Haniš, Dita Schaffelhoferová
Cor et Vasa.2023; 65(4): 692. CrossRef
KSNM60 in Nuclear Endocrinology: from the Beginning to the Future
Chae Moon Hong, Young Jin Jeong, Hae Won Kim, Byeong-Cheol Ahn
Nuclear Medicine and Molecular Imaging.2022; 56(1): 17. CrossRef
Change of Computed Tomography-Based Body Composition after Adrenalectomy in Patients with Pheochromocytoma
Yousun Ko, Heeryoel Jeong, Seungwoo Khang, Jeongjin Lee, Kyung Won Kim, Beom-Jun Kim
Cancers.2022; 14(8): 1967. CrossRef
Evaluation and Management of Bone Health in Patients with Thyroid Diseases: a Position Statement from the Korean Thyroid Association
A Ram Hong, Hwa Young Ahn, Bu Kyung Kim, Seong Hee Ahn, So Young Park, Min-Hee Kim, Jeongmin Lee, Sun Wook Cho, Ho-Cheol Kang
International Journal of Thyroidology.2022; 15(1): 1. CrossRef
Pheochromocytoma with Retroperitoneal Metastasis: A Case Report
建新崔
Advances in Clinical Medicine.2021; 11(05): 2239. 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.

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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
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Thyroid
Updates in the Pathologic Classification of Thyroid Neoplasms: A Review of the World Health Organization Classification: Yanhua Bai, Kennichi Kakudo, Chan Kwon Jung; Endocrinol Metab. 2020;35(4):696-715. Published online December 2, 2020; DOI: https://doi.org/10.3803/EnM.2020.807

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Advances in medical sciences and evidence-based medicine have led to momentous changes in classification and management of thyroid neoplasms. Much progress has been made toward avoiding overdiagnosis and overtreatment of thyroid cancers. The new 2017 World Health Organization (WHO) classification of thyroid neoplasms updated the diagnostic criteria and molecular and genetic characteristics reflecting the biology and behavior of the tumors, and newly introduced the category of borderline malignancy or uncertain malignant potential. Some neoplasms were subclassified, renamed, or redefined as a specific entity. This review introduces changes in the fourth edition WHO classification of thyroid tumors and updates the contemporary diagnosis and classification of thyroid tumors. We also discuss several challenges with the proposal of new diagnostic entities, since they have unique histopathologic and molecular features and clinical relevance.

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Recent Advances in Core Needle Biopsy for Thyroid Nodules: Chan Kwon Jung, Jung Hwan Baek; Endocrinol Metab. 2017;32(4):407-412. Published online December 14, 2017; DOI: https://doi.org/10.3803/EnM.2017.32.4.407

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Core needle biopsy (CNB) was introduced as an alternative diagnostic tool to fine-needle aspiration (FNA), and is increasingly being used in the preoperative assessment of thyroid nodules. CNB provides a definitive diagnosis in most cases, but it sometimes may be inconclusive. CNB has the advantage of enabling a histologic examination in relation to the surrounding thyroid tissue, immunohistochemistry, and molecular testing that can provide a more accurate assessment than FNA in selected cases. Nevertheless, CNB should be performed only by experienced experts in thyroid interventions to prevent complications because CNB needles are larger in caliber than FNA needles. As recent evidence has accumulated, and with improvements in the technique and devices for thyroid CNB, the Korean Society of Thyroid Radiology released its 2016 thyroid CNB guidelines and the Korean Endocrine Pathology Thyroid Core Needle Biopsy Study Group published a consensus statement on the pathology reporting system for thyroid CNB in 2015. This review presents the current consensus and recommendations regarding thyroid CNB, focusing on indications, complications, and pathologic classification and reporting.

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Revised Korean Thyroid Association Management Guidelines for Patients with Thyroid Nodules and Thyroid Cancer.: Ka Hee Yi, Young Joo Park, Sung Soo Koong, Jung Han Kim, Dong Gyu Na, Jin Sook Ryu, So Yeon Park, In Ae Park, Chung Hwan Baek, Young Kee Shong, Young Don Lee, Jaetae Lee, Jeong Hyun Lee, Jae Hoon Chung, Chan Kwon Jung, Seung Ho Choi, Bo Youn Cho; Endocrinol Metab. 2010;25(4):270-297. Published online December 1, 2010; DOI: https://doi.org/10.3803/EnM.2010.25.4.270

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A Patient with Concurrent Medullary and Papillary Carcinoma of the Thyroid.: Seung Hee Yoo, Keun Joon Lim, Seung Hwan Lee, Ji Hyun Kim, Soon Hwa Hong, Jae Hyoung Cho, Chan Kwon Jung, Hyuk Sang Kwon, Kun Ho Yoon, Min Sik Kim, Bong Yun Cha, Ho Young Son; J Korean Endocr Soc. 2007;22(3):235-240. Published online June 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.3.235

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The origin of medullary thyroid carcinoma and papillary thyroid carcinoma are embryogenically different, so these tumors have been thought to be independent of each other. We experienced a case of concurrent medullary and papillary thyroid carcinoma in one patient. The patient underwent total thyroidectomy and both two tumors were located at different lobes, respectively. Both tumors showed their own characteristic pathologic and immunohistochemical findings. The patient's elevated calcitonin level returned to the normal range after operation and there has been no evidence of recurrence. It is still controversial whether the concurrency is just coincidental or it arises from activation of a common tumorigenic pathway.

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A Case of Concurrent Papillary and Medullary Thyroid Carcinomas Detected as Recurrent Medullary Carcinoma after Initial Surgery for Papillary Carcinoma
Dongbin Ahn, Jin Ho Sohn, Ji Young Park
Journal of Korean Thyroid Association.2013; 6(1): 80. CrossRef

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