Journal of Pathology and Translational Medicine

Yoon Jin Cha

13 Articles

TERT mutations and aggressive histopathologic characteristics of radioiodine-refractory papillary thyroid cancer: Ju Yeon Pyo, Yoon Jin Cha, SoonWon Hong; J Pathol Transl Med. 2024;58(6):310-320. Published online September 12, 2024; DOI: https://doi.org/10.4132/jptm.2024.07.29

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Background
Radioiodine (RI) ablation following thyroid-stimulating hormone suppression is an effective treatment for papillary thyroid cancer (PTC), typically leading to favorable outcomes. However, RI-refractory tumors exhibit aggressive behavior and poor prognoses. Recent studies highlight the role of genetic abnormalities in PTC signaling pathways, including the activation of telomerase reverse transcriptase (TERT), and the correlation of mutations with adverse outcomes.
Methods
This study analyzed mutations in BRAF V600E and the TERT-promoter genes, comparing clinicopathological features between RI-refractory and RI-responsive PTCs. Among 82 RI-refractory patients, formalin-fixed, paraffin-embedded tissues from initial surgeries were available for 26. Another 89 without distant metastasis over 5 years formed a matched RI-responsive control group.
Results
Histopathologically, RI-refractory PTCs showed increased frequencies of small tumor clusters without fibrovascular cores, hobnail features, and a high height-to-width ratio of tumor cells. These tumors were more likely to exhibit necrosis, mitosis, lymph node metastasis, extrathyroidal extension, and involvement of resection margins. TERT-promoter mutations were statistically significantly associated with these aggressive clinicopathologic features. Immunohistochemically, decreased expression of sodium iodide symporter and thyroglobulin stimulating hormone receptor proteins was common in RI-refractory PTCs, along with lower levels of oncogenic proteins such as vascular endothelial cell growth factor, vascular endothelial cell growth factor receptor 2, and nuclear factor kappa-light-chain-enhancer of activated B cells. Total loss of PTEN expression was occasionally observed. In contrast, all cases tested positive for cytoplasmic β-catenin.
Conclusions
RI-refractory PTCs are linked to TERT mutations and exhibit specific aggressive histopathologic features, particularly in tumor centers.

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The ability of anexelekto (AXL) expression and TERT promoter mutation to predict radioiodine-refractory differentiated thyroid carcinoma
Hasrayati Agustina, Tutik Nur Ayni, Yohana Azhar, Erwin Affandi Soeriadi, Bethy Suryawathy Hernowo
Diagnostic Pathology.2025;[Epub] CrossRef
Clinicopathologic characteristics of papillary thyroid carcinoma, tall cell subtype and subtype with tall cell features, an institutional experience
Xueting Jin, Shunsuke Koga, Xiao Zhou, Niaz Z. Khan, Zubair W. Baloch
Human Pathology.2025; : 105867. CrossRef

Clinicopathological differences in radiation-induced organizing hematomas of the brain based on type of radiation treatment and primary lesions: Myung Sun Kim, Se Hoon Kim, Jong-Hee Chang, Mina Park, Yoon Jin Cha; J Pathol Transl Med. 2022;56(1):16-21. Published online October 15, 2021; DOI: https://doi.org/10.4132/jptm.2021.08.30

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Background
Radiation-induced organizing hematoma (RIOH) is a sporadic form of cavernous hemangioma (CH) that occurs after cerebral radiation. RIOH lesions are distinct histologically from de novo CH; however, detailed research on this subject is lacking. In the present study, the clinical and histological features of RIOHs were evaluated based on causative lesions.
Methods
The present study included 37 RIOHs confirmed by surgical excision from January 2009, to May 2020, in Yonsei Severance Hospital. All cases were divided into subgroups based on type of radiation treatment (gamma knife surgery [GKS], n = 24 vs. conventional radiation therapy [RT], n = 13) and pathology of the original lesion (arteriovenous malformation, n = 14; glioma, n = 12; metastasis, n = 4; other tumors, n = 7). The clinicopathological results were compared between the groups.
Results
Clinical data of multiplicity, latency, and size and wall thickness of the original tumors and RIOHs were analyzed. The GKS group showed shorter latency (5.85 ± 4.06 years vs. 11.15 ± 8.27 years, p = .046) and thicker tumor wall (693.7 ± 565.7 μm vs. 406.9 ± 519.7 μm, p = .049) than the conventional RT group. Significant difference was not found based on original pathology.
Conclusions
RIOH is more likely to occur earlier with thick tumor wall in subjects who underwent GKS than in patients who underwent conventional RT. These results indicate the clinical course of RIOH differs based on type of treatment and might help determine the duration of follow-up.

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Radiation-Induced Cavernous Malformation in the Cerebellum: Clinical Features of Two Cases
Hyoung Soo Choi, Chae-Yong Kim, Byung Se Choi, Seung Hyuck Jeon, In Ah Kim, Joo-Young Kim, Kyu Sang Lee, Gheeyoung Choe
Brain Tumor Research and Treatment.2025; 13(2): 58. CrossRef
End-stage ADPKD with a low-frequency PKD1 mosaic variant accelerated by chemoradiotherapy
Hiroaki Hanafusa, Hiroshi Yamaguchi, Naoya Morisada, Ming Juan YE, Riki Matsumoto, Hiroaki Nagase, Kandai Nozu
Human Genome Variation.2024;[Epub] CrossRef
Recapitulating the Key Advances in the Diagnosis and Prognosis of High-Grade Gliomas: Second Half of 2021 Update
Guido Frosina
International Journal of Molecular Sciences.2023; 24(7): 6375. CrossRef
Earlier Age at Surgery for Brain Cavernous Angioma-Related Epilepsy May Achieve Complete Seizure Freedom without Aid of Anti-Seizure Medication
Ayataka Fujimoto, Hideo Enoki, Keisuke Hatano, Keishiro Sato, Tohru Okanishi
Brain Sciences.2022; 12(3): 403. CrossRef

A retrospective cytohistological correlation of fine-needle aspiration cytology with classification by the Milan System for Reporting Salivary Gland Cytopathology: Ji Hyun Park, Yoon Jin Cha, Ja Yeong Seo, Jae Yol Lim, Soon Won Hong; J Pathol Transl Med. 2020;54(5):419-425. Published online July 8, 2020; DOI: https://doi.org/10.4132/jptm.2020.06.09

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Abstract PDF

Background
Before publication of the new classification system named the Milan System for Reporting Salivary Gland Cytopathology (MSRSGC) in 2018, there was no standard classification for salivary gland lesions obtained by fine-needle aspiration (FNA). We therefore aimed to evaluate the diagnostic utility of this system by retrospectively reviewing FNA samples using the MSRSGC and to determine their risk of developing into neoplasms and becoming malignant.
Methods
Retrospective slide review and classification of salivary gland FNAs obtained over a 6-year period (2013–2018) at a single center were performed by two pathologists. The risks of neoplasm and malignancy for each category also were calculated.
Results
This study surveyed 374 FNAs (371 patients) performed over a six-year period and selected 148 cases that included documented surgical follow-up (39.6%). Among the surgically treated cases, the distributions of FNA categories were as follows: non-diagnostic (ND; 16.9%), non-neoplastic (NN; 2.7%), atypia of undetermined significance (AUS; 3.4%), benign (BN; 54.7%), salivary gland neoplasm of uncertain malignant potential (SUMP; 10.1%), suspicious for malignancy (SM; 6.8%), and malignant (M; 5.4%). The risk of malignancy (ROM) was 24.0% for ND, 0% for NN, 40.0% for AUS, 2.5% for BN, 46.7% for SUMP, 100% for SM, and 87.5% for M. The overall diagnostic accuracy was 95.9% (142/148 cases).
Conclusions
The newly proposed MSRSGC appears to be a reliable system for classification of salivary gland lesions according to the associated ROM.

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The Impact of Lesion-Specific and Sampling-Related Factors on Success of Salivary Gland Fine-Needle Aspiration Cytology
Marcel Mayer, Mohammad Marwan Alfarra, Kathrin Möllenhoff, Marianne Engels, Christoph Arolt, Alexander Quaas, Philipp Wolber, Louis Jansen, Lisa Nachtsheim, Maria Grosheva, Jens Peter Klussmann, Sami Shabli
Head and Neck Pathology.2025;[Epub] CrossRef
The Myriad Spectrum of Salivary Gland Lesions: Cytohistological Correlation on Fine Needle Aspiration Cytology, Core Needle Biopsy, and Resections in a 5‐Year Single Institutional Experience of North India
Zachariah Chowdhury, Pallavi Majumdar, Sumeet Narain, Komal Lamba
Diagnostic Cytopathology.2025; 53(8): 391. CrossRef
The Milan system for reporting salivary gland cytopathology – Assessment of utility and the risk of malignancy
Annu E. Prakash, Renu Sukumaran, Nileena Nayak, K. Lakshmi, Anitha Mathews, Jayasree Kattoor
Indian Journal of Cancer.2024; 61(3): 575. CrossRef
Salivary gland fine-needle aspiration biopsy: quality assurance results from a tertiary cancer center
Fanni Ratzon, Dominique L. Feliciano, Nora Katabi, Bin Xu, Oscar Lin, Xiao-Jun Wei
Journal of the American Society of Cytopathology.2023; 12(3): 206. CrossRef
Cytohistological correlation and risk stratification of salivary gland lesions using the Milan System for Reporting Salivary Gland Cytopathology: A tertiary care centre experience
Tarun Kumar, Prerna Tewari, Jitendra Singh Nigam, Shreekant Bharti, Surabhi, Ruchi Sinha, Punam Prasad Bhadani
Cytopathology.2023; 34(3): 225. CrossRef
Assessment of Risk of Malignancy of Fine-needle Aspiration Cytology in Salivary Gland Lesions Using the Milan System for Reporting Salivary Gland Cytopathology Categorization: A Systematic Review and Meta-analysis
Amit Kumar, Subhash Chandra, Bishnupati Singh, Swati Sharma, Ankita Tandon, Ajoy Kumar Shahi
The Journal of Contemporary Dental Practice.2023; 23(10): 1039. CrossRef
Milan Sınıflandırma Sistemi’ne Göre Değerlendirilen Tükürük Bezi İnce İğne Aspirasyon Sitolojilerinin Histopatolojik Tanı Uyumu
Özlem SARAYDAROĞLU, Selin YİRMİBEŞ
Uludağ Üniversitesi Tıp Fakültesi Dergisi.2023; 49(3): 285. CrossRef
Milan system for reporting salivary gland cytopathology: Adoption and outcomes in a community setting
Samih J. Nassif, Ali R. Sasani, Garrey T. Faller, Jennifer L. Harb, Jagdish K. Dhingra
Head & Neck.2022; 44(6): 1462. CrossRef
Nondiagnostic salivary gland FNAs are associated with decreased risk of malignancy compared with “all‐comer” patients: Analysis of the Milan System for Reporting Salivary Gland Cytopathology with a focus on Milan I: Nondiagnostic
Shu K. Lui, Troy Tenney, Patrick C. Mullane, Kartik Viswanathan, Daniel J. Lubin
Cancer Cytopathology.2022; 130(10): 800. CrossRef
Application of the Milan System for Reporting Salivary Gland Cytopathology: A systematic review and meta‐analysis
Zhaoyang Wang, Huan Zhao, Huiqin Guo, Changming An
Cancer Cytopathology.2022; 130(11): 849. CrossRef
Multiplexed single‐cell analysis of FNA allows accurate diagnosis of salivary gland tumors
Juhyun Oh, Tae Yeon Yoo, Talia M. Saal, Lisa Tsay, William C. Faquin, Jonathan C.T. Carlson, Daniel G. Deschler, Sara I. Pai, Ralph Weissleder
Cancer Cytopathology.2022; 130(8): 581. CrossRef
Cytologic analysis of vitreous fluids: A retrospective review of our 24 years of experience
Gabriel L. Collins, Elizabeth W. Hubbard, Christopher T. Clark, Lisa D. Duncan, Laurentia Nodit
Diagnostic Cytopathology.2021; 49(10): 1122. CrossRef

Adjunctive markers for classification and diagnosis of central nervous system tumors: results of a multi-center neuropathological survey in Korea: Yoon Jin Cha, Se Hoon Kim, Na Rae Kim; J Pathol Transl Med. 2020;54(2):165-170. Published online February 20, 2020; DOI: https://doi.org/10.4132/jptm.2020.02.04

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Abstract PDF Supplementary Material

Background
The revised 4th 2016 World Health Organization (WHO) classification of tumors of the central nervous system (CNS) classification has adopted integrated diagnosis encompassing the histology and molecular features of CNS tumors. We aimed to investigate the immunohistochemistry, molecular testing, and testing methods for diagnosis of CNS tumors in pathological labs of tertiary centers in Korea, and evaluate the adequacy of tests for proper diagnosis in daily practice.
Methods
A survey, composed of eight questions concerning molecular testing for diagnosis of CNS tumors, was sent to 10 neuropathologists working in tertiary centers in Korea.
Results
For diagnosis of astrocytic and oligodendroglial tumors, all 10 centers performed isocitrate dehydrogenase mutations testing and 1p/19q loss of heterozygosity. For glioneuronal tumors, immunohistochemistry (IHC) assays for synaptophysin (n = 9), CD34 (n = 7), BRAF(VE1) (n = 5) were used. For embryonal tumors, particularly in medulloblastoma, four respondents used IHC panel (growth factor receptor bound protein 2-associated protein 1, filamin A, and yes-associated protein 1) for molecular subclassification. Regarding meningioma, all respondents performed Ki-67 IHC and five performed telomerase reverse transcriptase promoter mutation.
Conclusions
Most tertiary centers made proper diagnosis in line with 2016 WHO classification. As classification of CNS tumors has evolved to be more complex and more ancillary tests are required, these should be performed considering the effect of necessity and justification.

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Exploring the role of epidermal growth factor receptor variant III in meningeal tumors
Rashmi Rana, Vaishnavi Rathi, Kirti Chauhan, Kriti Jain, Satnam Singh Chhabra, Rajesh Acharya, Samir Kumar Kalra, Anshul Gupta, Sunila Jain, Nirmal Kumar Ganguly, Dharmendra Kumar Yadav, Timir Tripathi
PLOS ONE.2021; 16(9): e0255133. CrossRef

A Multi-institutional Study of Prevalence and Clinicopathologic Features of Non-invasive Follicular Thyroid Neoplasm with Papillary-like Nuclear Features (NIFTP) in Korea: Ja Yeong Seo, Ji Hyun Park, Ju Yeon Pyo, Yoon Jin Cha, Chan Kwon Jung, Dong Eun Song, Jeong Ja Kwak, So Yeon Park, Hee Young Na, Jang-Hee Kim, Jae Yeon Seok, Hee Sung Kim, Soon Won Hong; J Pathol Transl Med. 2019;53(6):378-385. Published online October 21, 2019; DOI: https://doi.org/10.4132/jptm.2019.09.18

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Abstract PDF

Background
In the present multi-institutional study, the prevalence and clinicopathologic characteristics of non-invasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP) were evaluated among Korean patients who underwent thyroidectomy for papillary thyroid carcinoma (PTC).
Methods
Data from 18,819 patients with PTC from eight university hospitals between January 2012 and February 2018 were retrospectively evaluated. Pathology reports of all PTCs and slides of potential NIFTP cases were reviewed. The strict criterion of no papillae was applied for the diagnosis of NIFTP. Due to assumptions regarding misclassification of NIFTP as non-PTC tumors, the lower boundary of NIFTP prevalence among PTCs was estimated. Mutational analysis for BRAF and three RAS isoforms was performed in 27 randomly selected NIFTP cases.
Results
The prevalence of NIFTP was 1.3% (238/18,819) of all PTCs when the same histologic criteria were applied for NIFTP regardless of the tumor size but decreased to 0.8% (152/18,819) when tumors ≥1 cm in size were included. The mean follow-up was 37.7 months and no patient with NIFTP had evidence of lymph node metastasis, distant metastasis, or disease recurrence during the follow-up period. A difference in prevalence of NIFTP before and after NIFTP introduction was not observed. BRAF^V600E mutation was not found in NIFTP. The mutation rate for the three RAS genes was 55.6% (15/27).
Conclusions
The low prevalence and indolent clinical outcome of NIFTP in Korea was confirmed using the largest number of cases to date. The introduction of NIFTP may have a small overall impact in Korean practice.

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Case report & review: Bilateral NIFTP harboring concomitant HRAS and KRAS mutation: Report of an unusual case and literature review
Marianna Rita Brogna, Francesca Collina, Maria Grazia Chiofalo, Debora De Bartolo, Angela Montone, Maria Rosaria Schiano, Michele Del Sesto, Nubia Pizza, Gerardo Ferrara
Molecular Carcinogenesis.2024; 63(12): 2273. CrossRef
Non-invasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP): what do we need to know?
Andrés Coca-Pelaz, Juan P. Rodrigo, Abbas Agaimy, Dana M. Hartl, Göran Stenman, Vincent Vander Poorten, Antti A. Mäkitie, Mark Zafereo, Karthik N. Rao, Gregory W. Randolph, Alessandra Rinaldo, Alfio Ferlito
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Rupali Bavikar, Ruchi S. Randive, Anubhaw Verma, Madhuri Singh, Vidya Viswanathan, Arpana Dharwadkar
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Analysis of a pre-2017 follicular variant papillary thyroid carcinoma cohort reclassified as noninvasive follicular thyroid neoplasm with papillary-like features (NIFTP): an 11-year retrospective single institution experience
Shaham Beg, Sana Irfan Khan, Isabella Cui, Theresa Scognamiglio, Rema Rao
Journal of the American Society of Cytopathology.2023; 12(2): 112. CrossRef
Noninvasive Follicular Thyroid Neoplasm With Papillary-Like Nuclear Features: What a Surgeon Should Know
Jabir Alharbi, Thamer Alraddadi, Haneen Sebeih, Mohammad A Alessa, Haddad H Alkaf, Ahmed Bahaj, Sherif K Abdelmonim
Cureus.2023;[Epub] CrossRef
NTRK Fusion in a Cohort of BRAF p. V600E Wild-Type Papillary Thyroid Carcinomas
Seung Eun Lee, Mi-Sook Lee, Heejin Bang, Mi Young Kim, Yoon-La Choi, Young Lyun Oh
Modern Pathology.2023; 36(8): 100180. CrossRef
A Comprehensive Study on the Diagnosis and Management of Noninvasive Follicular Thyroid Neoplasm with Papillary-Like Nuclear Features
Bayan A. Alzumaili, Lauren N. Krumeich, Reagan Collins, Timothy Kravchenko, Emad I. Ababneh, Adam S. Fisch, William C. Faquin, Vania Nosé, Maria Martinez-Lage, Gregory W. Randolph, Rajshri M. Gartland, Carrie C. Lubitz, Peter M. Sadow
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Clinical-Pathological and Molecular Evaluation of 451 NIFTP Patients from a Single Referral Center
Paola Vignali, Agnese Proietti, Elisabetta Macerola, Anello Marcello Poma, Liborio Torregrossa, Clara Ugolini, Alessio Basolo, Antonio Matrone, Teresa Rago, Ferruccio Santini, Rossella Elisei, Gabriele Materazzi, Fulvio Basolo
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Noninvasive follicular thyroid neoplasm with papillary-like nuclear features: its updated diagnostic criteria, preoperative cytologic diagnoses and impact on the risk of malignancy
Hee Young Na, So Yeon Park
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SFE-AFCE-SFMN 2022 Consensus on the management of thyroid nodules : Follow-up: How and how long?
Sophie Leboulleux, Livia Lamartina, Emmanuelle Lecornet Sokol, Fabrice Menegaux, Laurence Leenhardt, Gilles Russ
Annales d'Endocrinologie.2022; 83(6): 407. CrossRef
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Kennichi Kakudo
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Clinicopathological parameters for predicting non-invasive follicular thyroid neoplasm with papillary features (NIFTP)
Eunju Jang, Kwangsoon Kim, Chan Kwon Jung, Ja Seong Bae, Jeong Soo Kim
Therapeutic Advances in Endocrinology and Metabolism.2021;[Epub] 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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Amandeep Singh, Jeehoon Ham, Joseph William Po, Navin Niles, Tara Roberts, Cheok Soon Lee
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Noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP) is rare, benign lesion using modified stringent diagnostic criteria: Reclassification and outcome study
David Cubero Rego, Hwajeong Lee, Anne Boguniewicz, Timothy A. Jennings
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Noninvasive Follicular Thyroid Neoplasm with Papillary-Like Nuclear Features: From Echography to Genetic Profile
Francesca Maletta, Enrico Costantino Falco, Alessandro Gambella, Jasna Metovic, Mauro Papotti
The Tohoku Journal of Experimental Medicine.2020; 252(3): 209. CrossRef

Thyroid Fine-Needle Aspiration Cytology Practice in Korea: Yoon Jin Cha, Ju Yeon Pyo, SoonWon Hong, Jae Yeon Seok, Kyung-Ju Kim, Jee-Young Han, Jeong Mo Bae, Hyeong Ju Kwon, Yeejeong Kim, Kyueng-Whan Min, Soonae Oak, Sunhee Chang; J Pathol Transl Med. 2017;51(6):521-527. Published online October 11, 2017; DOI: https://doi.org/10.4132/jptm.2017.09.26

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Abstract PDF

We reviewed the current status of thyroid fine-needle aspiration cytology (FNAC) in Korea. Thyroid aspiration biopsy was first introduced in Korea in 1977. Currently, radiologists aspirate the thyroid nodule under the guidance of ultrasonography, and cytologic interpretation is only legally approved when a cytopathologist makes the diagnosis. In 2008, eight thyroid-related societies came together to form the Korean Thyroid Association. The Korean Society for Cytopathology and the endocrine pathology study group of the Korean Society for Pathologists have been updating the cytologic diagnostic guidelines. The Bethesda System for Reporting Thyroid Cytopathology was first introduced in 2009, and has been used by up to 94% of institutions by 2016. The average diagnosis rates are as follows for each category: I (12.4%), II (57.9%), III (10.4%), IV (2.9%), V (3.7%), and VI (12.7%). The malignancy rates in surgical cases are as follows for each category: I (28.7%), II (27.8%), III (50.6%), IV (52.3%), V (90.7%), and VI (100.0%). Liquid-based cytology has been used since 2010, and it was utilized by 68% of institutions in 2016. The categorization of thyroid lesions into “atypia of undetermined significance” or “follicular lesion of undetermined significance” is necessary to draw consensus in our society. Immunocytochemistry for galectin-3 and BRAF is used. Additionally, a molecular test for BRAF in thyroid FNACs is actively used. Core biopsies were performed in only 44% of institutions. Even the institutions that perform core biopsies only perform them for less than 3% of all FNACs. However, only 5% of institutions performed core biopsies up to three times more than FNAC.

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State of the art of thyroid pathology: FNA diagnostic accuracy in an intermediate center in Ibagué
Daniel Javier Velez Bohorquez, Nohora Bibiana Varon Arce, Sandra Milena Tellez Olaya, Sebastian Camilo Mora Garcia, Anggi Margarita Velez Bohorquez, Mabel Elena Bohorquez Lozano
Universitas Médica.2023;[Epub] CrossRef
The Asian Thyroid Working Group, from 2017 to 2023
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Journal of Pathology and Translational Medicine.2023; 57(6): 289. CrossRef
Diagnostic value of thyroid imaging reporting and data system combined with BRAFV600E mutation analysis in Bethesda categories III–V thyroid nodules
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Na Rae Kim, Jae Yeon Seok, Yoo Seung Chung, Joon Hyop Lee, Dong Hae Chung
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Systematic thyroid screening in myotonic dystrophy: link between thyroid volume and insulin resistance
Adrien Ben Hamou, Stéphanie Espiard, Christine Do Cao, Miriam Ladsous, Camille Loyer, Alexandre Moerman, Samuel Boury, Maéva Kyheng, Claire-Marie Dhaenens, Vincent Tiffreau, Pascal Pigny, Gilles Lebuffe, Robert Caiazzo, Sébastien Aubert, Marie Christine V
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International Journal of Thyroidology.2018; 11(1): 15. CrossRef
BRAFV600E Mutation is a Strong Preoperative Indicator for Predicting Malignancy in Thyroid Nodule Patients with Atypia of Undetermined Significance Identified by Fine Needle Aspiration
Hye Rang Choi, Bo-Yoon Choi, Jae Hoon Cho, Young Chang Lim
Korean Journal of Otorhinolaryngology-Head and Neck Surgery.2018; 61(11): 600. CrossRef
The Usefulness of Immunocytochemistry of CD56 in Determining Malignancy from Indeterminate Thyroid Fine-Needle Aspiration Cytology
Hyunseo Cha, Ju Yeon Pyo, Soon Won Hong
Journal of Pathology and Translational Medicine.2018; 52(6): 404. CrossRef
Thyroid FNA cytology in Asian practice—Active surveillance for indeterminate thyroid nodules reduces overtreatment of thyroid carcinomas
K. Kakudo, M. Higuchi, M. Hirokawa, S. Satoh, C. K. Jung, A. Bychkov
Cytopathology.2017; 28(6): 455. CrossRef
The Use of Fine-Needle Aspiration (FNA) Cytology in Patients with Thyroid Nodules in Asia: A Brief Overview of Studies from the Working Group of Asian Thyroid FNA Cytology
Chan Kwon Jung, SoonWon Hong, Andrey Bychkov, Kennichi Kakudo
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A Rare Case of Aggressive Melanotic Schwannoma Occurred in Spinal Nerve of a 59-Year-Old Male: Sung-eun Choi, Yoon Jin Cha, Jisup Kim, Hyunseo Cha, Jayeong Seo, Sung-Uk Kuh, Sung-Jun Kim, Se Hoon Kim; J Pathol Transl Med. 2017;51(5):505-508. Published online April 4, 2017; DOI: https://doi.org/10.4132/jptm.2017.01.04

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Abstract PDF

Melanotic schwannoma (MS) is a rare variant of nerve sheath neoplasm that shows ultrastructural and immunophenotypical features of Schwann cells but also has cytoplasmic melanosomes and is reactive for melanocytic markers as well. Unlike conventional schwannoma, which is totally benign, MS has an unpredictable prognosis and is thought to have low-malignant potential. Herein, we present a rare case of recurrent MS in lumbar spine of a 59-year-old male.

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Abstract PDF

This paper reports a case of low-grade adenosquamous carcinoma (LGASC) arising in a 69-year-old woman, who presented with a 1-cm palpable mass on her right breast. Core needle biopsy diagnosed the mass as a fibroadenoma. After six months, the mass increased in size, and the patient received subsequent mammotome excision. On microscopic examination, bland-looking small glands were infiltrating into the fibrotic stroma with lymphocytic infiltrates at the periphery. Hematoxylin and eosin staining revealed relatively easily detectable myoepithelial cells along the outside in each of the glandular structures with variable degrees of squamous metaplasia. Based on histologic features, the patient was diagnosed with LGASC. LGASC is a rare variant of metaplastic carcinoma, which is characterized by a favorable prognosis. Due to the bland cytology and presence of myoepithelial cells, LGASC can be misdiagnosed as benign lesion. Additionally, inconsistent expression of myoepithelial markers could aid the diagnosis of LGASC.

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Rosai-Dorfman Disease in the Breast with Increased IgG4 Expressing Plasma Cells: A Case Report: Yoon Jin Cha, Woo Ick Yang, Se Ho Park, Ja Seung Koo; Korean J Pathol. 2012;46(5):489-493. Published online October 25, 2012; DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.5.489

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Abstract PDF

Rosai-Dorfman disease (RDD) can present in any anatomic site, but breast involvement is rarely reported. Recently, a relationship between RDD and IgG4-related sclerosing disease has been suggested. Here we report another case of RDD with overlapping features of IgG4-related sclerosing disease occurring in a right breast of a 62-year-old female. On microscopic examination, the mass demonstrated a characteristic zonal pattern of proliferation of large polygonal histiocytes and lymphoplasma cells with stromal fibrosis. Emperipolesis was observed in histiocytes with abundant cytoplasm, which showed immunoreactivity for S-100 protein and CD68; the diagnosis of RDD was made. Sheets of plasma cells in the fibrotic stroma demonstrated positive reactions for IgG and IgG4. The mean count of IgG4-positive plasma cells was 100.2/high power field, and the ratio of IgG4/IgG was 56.7%. Additional findings of stromal fibrosis and obliteration of preexisting breast lobules suggested overlapping features with IgG4-related sclerosing disease.

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Rosai-Dorfman Disease of the Breast With Variable IgG4+ Plasma Cells
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A subset of Rosai–Dorfman disease cases show increased IgG4‐positive plasma cells: another red herring or a true association with IgG4‐related disease?
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The Clinicopathologic Features of Molecular Apocrine Breast Cancer: Yoon Jin Cha, Woo-Hee Jung, Ja Seung Koo; Korean J Pathol. 2012;46(2):169-176. Published online April 25, 2012; DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.2.169

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Abstract PDF

Background

To elucidate the clinicopathologic features and their implications on the immunohistochemistry in cases of molecular apocrine breast cancer (MABC).

Methods

Immunohistochemical (IHC) staining for estrogen receptor (ER), human epidermal growth factor receptor 2 (HER-2), cytokeratin (CK) 5/6, epidermal growth factor receptor (EGFR), androgen receptor (AR), gamma-glutamyltrasferase 1 (GGT1) and Ki-67 was performed on tissue microarray breast cancer samples from 204 patients. Phenotypes of breast cancer were divided based on the IHC status of ER, AR and GGT1 into the following: luminal type, ER positive and AR and/or GGT1 positive; basal type, ER, AR, and GGT1 negative; non-basal type, ER positive and AR and GGT1 negative; and MABC type, ER negative and AR and/or GGT1 positive.

Results

In our series of patients (n=204), there were 26 cases of MABC. Besides, there were 18, 60, and 100 cases of luminal type, basal type and non-basal type, respectively. The MABC demonstrated apocrine histology and a higher prevalence of HER-2 positivity than other phenotypes. With the basal type, the MABC manifested a more frequent expression of CK5/6 and EGFR and a higher Ki-67 index than other phenotypes (p<0.001). There were no significant differences in patient prognosis between the phenotypes of breast cancer.

Conclusions

MABC are distinguishable from other phenotypes based on the apocrine histology and a higher expression rate of HER-2.

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