Journal of Pathology and Translational Medicine

Most-download articles are from the articles published in 2023 during the last three month.

Newsletter

What’s new in thyroid pathology 2024: updates from the new WHO classification and Bethesda system: Andrey Bychkov, Chan Kwon Jung; J Pathol Transl Med. 2024;58(2):98-101. Published online March 13, 2024; DOI: https://doi.org/10.4132/jptm.2024.03.06

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In line with the release of the 5th edition WHO Classification of Tumors of Endocrine Organs (2022) and the 3rd edition of the Bethesda System for Reporting Thyroid Cytopathology (2023), the field of thyroid pathology and cytopathology has witnessed key transformations. This digest brings to the fore the refined terminologies, newly introduced categories, and contentious methodological considerations pivotal to the updated classification.

Citations

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Diagnosis and management of thyroid nodule
Suganya Sekar, Deepak Thomas Abraham
Current Opinion in Endocrinology, Diabetes & Obesity.2025; 32(5): 167. CrossRef
Impact of thyroid Bethesda category IV (follicular neoplasm) terminology unification on atypia of undetermined significance reporting patterns in thyroid fine-needle aspiration
Shirin Abbasi, Lorena Marcano-Bonilla, Syed Z. Ali
Journal of the American Society of Cytopathology.2025;[Epub] CrossRef
Cytologic and Clinicopathologic Features of Papillary Thyroid Carcinoma with Prominent Hobnail Features on FNAC
Deepali Saxena, Ravi Hari Phulware, Prashant Durgapal, Arvind Kumar, Amit Kumar Tyagi
Indian Journal of Otolaryngology and Head & Neck Surgery.2024; 76(5): 4885. CrossRef
FHL1: A novel diagnostic marker for papillary thyroid carcinoma
Yeting Zeng, Dehua Zeng, Xingfeng Qi, Hanxi Wang, Xuzhou Wang, Xiaodong Dai, Lijuan Qu
Pathology International.2024; 74(9): 520. CrossRef
Nouveautés en pathologie thyroïdienne : classification OMS 2022, système Bethesda 2023, biologie moléculaire et testing moléculaire
Mohamed Amine Bani, Sophie Moog, Voichita Suciu, Livia Lamartina, Abir Al Ghuzlan
Bulletin du Cancer.2024; 111(10): 10S5. CrossRef
Cytologic hallmarks and differential diagnosis of papillary thyroid carcinoma subtypes
Agnes Stephanie Harahap, Chan Kwon Jung
Journal of Pathology and Translational Medicine.2024; 58(6): 265. CrossRef
Surgical and Pathological Challenges in Thyroidectomy after Thermal Ablation of Thyroid Nodules
Ting-Chun Kuo, Kuen-Yuan Chen, Hsiang-Wei Hu, Jie-Yang Jhuang, Ming-Tsan Lin, Chin-Hao Chang, Ming-Hsun Wu
Thyroid®.2024; 34(12): 1503. CrossRef

Review

A stepwise approach to fine needle aspiration cytology of lymph nodes: Yosep Chong, Gyeongsin Park, Hee Jeong Cha, Hyun-Jung Kim, Chang Suk Kang, Jamshid Abdul-Ghafar, Seung-Sook Lee; J Pathol Transl Med. 2023;57(4):196-207. Published online July 11, 2023; DOI: https://doi.org/10.4132/jptm.2023.06.12

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Abstract PDF Supplementary Material

The cytological diagnosis of lymph node lesions is extremely challenging because of the diverse diseases that cause lymph node enlargement, including both benign and malignant or metastatic lymphoid lesions. Furthermore, the cytological findings of different lesions often resemble one another. A stepwise diagnostic approach is essential for a comprehensive diagnosis that combines: clinical findings, including age, sex, site, multiplicity, and ultrasonography findings; low-power reactive, metastatic, and lymphoma patterns; high-power population patterns, including two populations of continuous range, small monotonous pattern and large monotonous pattern; and disease-specific diagnostic clues including granulomas and lymphoglandular granules. It is also important to remember the histological features of each diagnostic category that are common in lymph node cytology and to compare them with cytological findings. It is also essential to identify a few categories of diagnostic pitfalls that often resemble lymphomas and easily lead to misdiagnosis, particularly in malignant small round cell tumors, poorly differentiated squamous cell carcinomas, and nasopharyngeal undifferentiated carcinoma. Herein, we review a stepwise approach for fine needle aspiration cytology of lymphoid diseases and suggest a diagnostic algorithm that uses this approach and the Sydney classification system.

Citations

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Development and Validation of Explainable Artificial Intelligence System for Automatic Diagnosis of Cervical Lymphadenopathy From Ultrasound Images
Ming Xu, Yubiao Yue, Zhenzhang Li, Yinhong Li, Guoying Li, Haihua Liang, Di Liu, Xiaohong Xu, Mohamadreza (Mohammad) Khosravi
International Journal of Intelligent Systems.2025;[Epub] CrossRef
Application of the Sydney system for classification and reporting lymph node cytopathology: a retrospective analysis at a tertiary centre
Ashok Teja Kummari, Pramod Kumar Pamu, Krishna Kiran Ganna, Param Jyothi, Sadashivudu
International Journal of Research in Medical Sciences.2025;[Epub] CrossRef
Diagnostic approach to FNA biopsy of cystic lesions of the head and neck
Stefen Andrianus, Olivia Leung, Zubair Baloch
Cancer Cytopathology.2025;[Epub] CrossRef
Applicability of Fine-Needle Aspiration Biopsy of Lymph Nodes Using WHO Reporting System: Comparison between Pediatric and Adult Brazilian Populations
Leonardo Fávaro Ficoto, Deolino João Camilo Júnior, Gustavo Resende Nora, Vitor Bonetti Valente, Daniel Galera Bernabé, José Cândido Caldeira Xavier-Júnior
Acta Cytologica.2025; : 1. CrossRef
Intraoperative cytological assessment of sentinel lymph nodes in gynecologic cancer: diagnostic accuracy and limitations
O. V. Pankova, S. V. Vtorushin, M. V. Klimova, D. S. Pismenny, M. O. Ochirov, L. A. Kolomiets, V. M. Perelmuter
Siberian journal of oncology.2025; 24(5): 72. CrossRef
Immunocytochemical markers, molecular testing and digital cytopathology for aspiration cytology of metastatic breast carcinoma
Joshua J. X. Li, Gary M. Tse
Cytopathology.2024; 35(2): 218. CrossRef
Response to comment on “A stepwise approach to fine needle aspiration cytology of lymph nodes”
Yosep Chong, Gyeongsin Park, Hee Jeong Cha, Hyun-Jung Kim, Chang Suk Kang, Jamshid Abdul-Ghafar, Seung-Sook Lee
Journal of Pathology and Translational Medicine.2024; 58(1): 43. CrossRef
Comment on “A stepwise approach to fine needle aspiration cytology of lymph nodes”
Elisabetta Maffei, Valeria Ciliberti, Pio Zeppa, Alessandro Caputo
Journal of Pathology and Translational Medicine.2024; 58(1): 40. CrossRef
The Incidence of Thyroid Cancer in Bethesda III Thyroid Nodules: A Retrospective Analysis at a Single Endocrine Surgery Center
Iyad Hassan, Lina Hassan, Nahed Balalaa, Mohamad Askar, Hussa Alshehhi, Mohamad Almarzooqi
Diagnostics.2024; 14(10): 1026. CrossRef
Efficiency of Fine-Needle Aspiration (FNA) in Relation to Tru-Cut Biopsy of Lateral Neck Swellings
Mohammed S Al Olaimat, Fahad S Al Qooz, Zaid R Alzoubi, Elham M Alsharaiah, Ali S Al Murdif, Mohammad O Alanazi
Cureus.2024;[Epub] CrossRef
Pitfalls in the Cytological Diagnosis of Nodal Hodgkin Lymphoma
Uma Handa, Rasheeda Mohamedali, Rajpal Singh Punia, Simrandeep Singh, Ranjeev Bhagat, Phiza Aggarwal, Manveen Kaur
Diagnostic Cytopathology.2024; 52(12): 715. CrossRef
Rapid 3D imaging at cellular resolution for digital cytopathology with a multi-camera array scanner (MCAS)
Kanghyun Kim, Amey Chaware, Clare B. Cook, Shiqi Xu, Monica Abdelmalak, Colin Cooke, Kevin C. Zhou, Mark Harfouche, Paul Reamey, Veton Saliu, Jed Doman, Clay Dugo, Gregor Horstmeyer, Richard Davis, Ian Taylor-Cho, Wen-Chi Foo, Lucas Kreiss, Xiaoyin Sara J
npj Imaging.2024;[Epub] CrossRef

Newsletters

What’s new in neuropathology 2024: CNS WHO 5th edition updates: Heather Smith, Jared T. Ahrendsen; J Pathol Transl Med. 2024;58(6):346-349. Published online September 30, 2024; DOI: https://doi.org/10.4132/jptm.2024.09.11

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Abstract PDF

The fifth edition of the World Health Organization (WHO) Classification of Central Nervous System (CNS) Tumors was released in 2021, just five years following the updated fourth edition. Advanced molecular testing such as next-generation sequencing, RNA fusion analysis, and DNA methylation profiling has led to more precise grading and classification of pre-existing tumor types as well as the recognition of new ones. Herein, we outline the major updates of the 2021 WHO Classification of CNS tumors, with emphasis on the expanded molecular characterization of CNS tumors.

Citations

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Bioinformatics insights into ACSL1 and ACSL5: prognostic and immune roles in low-grade glioma
Cheng Zhang, Zhonghua Lv, Hongsheng Liang, Fulan Hu, Haoran Bi
BMC Cancer.2025;[Epub] CrossRef
Current Understanding of the Exosomes and Their Associated Biomolecules in the Glioblastoma Biology, Clinical Treatment, and Diagnosis
Aghdas Ramezani, Maryam Rahnama, Fatemeh Mahmoudian, Fatemeh Shirazi, Mahmoud Ganji, Shohreh Bakhshi, Bahman Khalesi, Zahra Sadat Hashemi, Saeed Khalili
Journal of Neuroimmune Pharmacology.2025;[Epub] CrossRef
Diagnostic Utility of Intratumoral Susceptibility Signals in Adult Diffuse Gliomas: Tumor Grade Prediction and Correlation with Molecular Markers Within the WHO CNS5 (2021) Classification
José Ignacio Tudela Martínez, Victoria Vázquez Sáez, Guillermo Carbonell, Héctor Rodrigo Lara, Florentina Guzmán-Aroca, Juan de Dios Berna Mestre
Journal of Clinical Medicine.2025; 14(11): 4004. CrossRef
Glioblastoma in Puerto Rico: A 21-year population-based study
Carlos E Calderon-Valero, Esteban Rivera, Odaly Balasquide, Alejandro E Cedeño-Moran, Aixa De Jesus, Miguel Mayol Del Valle
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Brain Tumors, AI and Psychiatry: Predicting Tumor-Associated Psychiatric Syndromes with Machine Learning and Biomarkers
Matei Șerban, Corneliu Toader, Răzvan-Adrian Covache-Busuioc
International Journal of Molecular Sciences.2025; 26(17): 8114. CrossRef
Engineered bacteria/bacterial components strategy for glioma
Yan Zhu, Meilin Shen, Qi Chen, Huanghao Yang
Chemical Engineering Journal.2025; 525: 170539. CrossRef

What’s new in hematopathology 2025: myeloid neoplasms in the WHO 5th edition and ICC: Barina Aqil; J Pathol Transl Med. 2025;59(6):472-475. Published online October 22, 2025; DOI: https://doi.org/10.4132/jptm.2025.09.24

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Abstract PDF: The previous edition of the World Health Organization (WHO) classification of hematolymphoid neoplasms was published in 2008 and later revised in 2017. A new 5th edition of the WHO classification of hematolymphoid neoplasms was released in 2022. Additionally, the Clinical Advisory Committee developed the International Consensus Classification (ICC) of hematolymphoid tumors, which differs from the WHO classification in several key defining features as outlined below.

Original Article

Characterization of undifferentiated carcinoma of the salivary gland: clinicopathological and immunohistochemical analyses in comparison with lymphoepithelial carcinoma: Sangjoon Choi, Gyuheon Choi, Hee Jin Lee, Joon Seon Song, Yoon Se Lee, Seung-Ho Choi, Kyung-Ja Cho; J Pathol Transl Med. 2025;59(6):361-370. Published online September 8, 2025; DOI: https://doi.org/10.4132/jptm.2025.07.07

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Abstract PDF: Background
This study aimed to reclassify a subset of poorly differentiated salivary gland carcinoma that do not conform to any entities of the current World Health Organization (WHO) classification into the category of undifferentiated carcinoma (UDC) because they lack specific histologic differentiation or immunophenotype. Methods: Cases of salivary gland carcinomas from Asan Medical Center (2002–2020) that did not fit any existing WHO classification criteria and were diagnosed as poorly differentiated carcinoma, high-grade carcinoma, or UDC, were retrospectively reviewed. Immunohistochemical (IHC) staining for p40, neuroendocrine markers, androgen receptor (AR), and gross cystic disease fluid protein 15 (GCDFP-15) and Epstein-Barr virus (EBV) in situ hybridization (ISH) were performed. Clinical data were collected from the electronic medical records. Results: Six salivary gland carcinomas did not align with any specific entities and lacked distinct differentiation. Two of six cases displayed lymphoepithelial carcinoma (LEC)-like morphology but were negative or showed negligible immunoreactivity for p40 and EBV ISH, distinguishing them from LEC of the salivary gland. Two cases showed strong AR positivity, suggesting a potential overlap with salivary duct carcinoma (SDC) but lacked classic SDC morphologies and GCDFP-15 expression. No cases expressed neuroendocrine markers. Conclusions: This study proposes reclassifying these poorly differentiated or high-grade salivary gland carcinomas as UDC based on their indeterminate differentiation and IHC profiles. This may lead to a clearer diagnostic category and enhance our understanding of these high-grade tumors.

Review Article

Multiple sclerosis: a practical review for pathologists: Rachel A. Multz, Pouya Jamshidi, Jared T. Ahrendsen; J Pathol Transl Med. 2025;59(4):203-213. Published online June 27, 2025; DOI: https://doi.org/10.4132/jptm.2025.05.20

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Abstract PDF

Multiple sclerosis (MS) is an immune-mediated demyelinating disorder of the central nervous system. It is a chronic disorder resulting in neurologic dysfunction that is disseminated both in time (multiple discrete episodes) and space (involving multiple sites). Histologically, MS is characterized by localized loss of myelin with relative preservation of axons. This review will discuss the epidemiology, clinical, laboratory, radiologic, and pathologic features of multiple sclerosis, as well as briefly touch on the differential diagnosis, treatment, and prognosis of the disease, especially as they relate to the pathologic interpretation of tissue specimens.

Citations

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White Matter in Crisis: Oligodendrocytes and the Pathophysiology of Multiple Sclerosis
Mario García-Domínguez
Cells.2025; 14(18): 1408. CrossRef
Tumefactive demyelinating lesions: a case report and literature review
Raneem Jaki, Zyad Al-Frejat, Ziad Bitar
BMC Neurology.2025;[Epub] CrossRef

Original Articles

Frozen section histopathology and preanalytical factors affecting nucleic acid integrity in biobanked fresh-frozen human cancer tissues: Soungeun Kim, Jaewon Kang, Boyeon Kim, Yoonjin Kwak, Hye Seung Lee; J Pathol Transl Med. 2025;59(6):398-407. Published online September 12, 2025; DOI: https://doi.org/10.4132/jptm.2025.07.22

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Abstract PDF Supplementary Material: Background
In this study, we evaluated the effects of storage duration and ischemic time on nucleic acid quality of fresh-frozen tissue (FFT) from colon adenocarcinoma (COAD), hepatocellular carcinoma (HCC), and renal cell carcinoma (RCC) collected at the Cancer Tissue Bank of Seoul National University Hospital. Methods: A total of 102 FFT samples were analyzed to compare DNA integrity number (DIN) and RNA integrity number (RIN) according to storage duration and ischemic time. Additionally, the effects of histopathologic features—such as tumor cell proportion, inflammatory cell infiltration, and stromal fibrosis—on nucleic acid quality were evaluated. Results: DIN and RIN remained stable overall even though the storage duration increased, with no statistically significant differences observed. In particular, there was almost no decrease in RNA quality in HCC and RCC samples, but in COAD samples, RIN tended to decrease slightly as the storage duration increased. No significant difference was confirmed between ischemic time and nucleic acid quality, but in COAD tissue, RNA quality variability tended to increase as the ischemic time increased. Furthermore, RIN increased as the tumor cell proportion increased, whereas inflammatory cell infiltration and extracellular mucin pool were identified as independent negative predictors of RIN. Conclusions: This study confirmed that nucleic acid integrity can be maintained even during long-term storage of FFT and demonstrated that histologic features are closely related to RNA quality. This study would contribute to the establishment of quality assessment and management standards for biobank FFT samples.

Attitudes toward artificial intelligence in pathology: a survey-based study of pathologists in northern India: Manupriya Sharma, Kavita Kumari, Navpreet Navpreet, Sushma Bharti, Rajneesh Kumari; J Pathol Transl Med. 2025;59(6):382-389. Published online October 2, 2025; DOI: https://doi.org/10.4132/jptm.2025.07.10

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Abstract PDF Supplementary Material: Background
Artificial intelligence (AI) is transforming pathology by enhancing diagnostic accuracy, efficiency, and workflow standardization. Despite its growing presence, AI adoption remains limited, particularly in resource-constrained settings like India. This study assessed the knowledge, awareness, and perceptions of AI among pathologists in Northern India. Methods: A cross-sectional survey was conducted among 138 practicing pathologists in Northern India between April and June 2024. A structured online questionnaire was used to collect data on demographics, AI awareness, self-reported knowledge, sources of AI education, technological proficiency, and interest in AI-related training programs. Data analysis included descriptive statistics and chi-square tests, with p < .05 considered statistically significant. Results: AI awareness was high (88.4%), with significant sex differences (93.5% in females vs. 78.3% in males, p = .008). However, formal AI training was limited (6.5%), and only 16.7% had used AI as a diagnostic tool. Academic pathologists were more likely to engage with AI literature than their non-academic counterparts (p = .003). Interest in AI workshops was strong (92.8%). Access to whole slide imaging (WSI) correlated with higher AI knowledge (p = .008), as did self-reported technological proficiency (p = .001). Conclusions: Despite high AI awareness among pathologists, significant gaps remain in training, infrastructure, and practical application. Expanding access to digital pathology tools like WSI and improving digital literacy could facilitate AI adoption. Structured educational programs and greater investment in digital infrastructure are crucial for integrating AI into pathology practice.

Review Article

Central nervous system tumors with BCOR internal tandem duplications: a systematic review of clinical, radiological, and pathological features in 69 cases: Ji Young Lee, Sung Sun Kim, Hee Jo Baek, Tae-Young Jung, Kyung-Sub Moon, Jae-Hyuk Lee, Kyung-Hwa Lee; J Pathol Transl Med. 2025;59(5):273-280. Published online September 1, 2025; DOI: https://doi.org/10.4132/jptm.2025.07.23

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Abstract PDF Supplementary Material: Central nervous system tumors with BCL6 corepressor (BCOR) internal tandem duplications (ITDs) constitute a rare, recently characterized pediatric neoplasm with distinct molecular and histopathological features. To date, 69 cases have been documented in the literature, including our institutional case. These neoplasms predominantly occur in young children, with the cerebellum representing the most frequent anatomical location. Radiologically, these tumors present as large, well-circumscribed masses frequently demonstrating necrosis, hemorrhage, and heterogeneous enhancement. Histologically, they are characterized by a monomorphic cellular population featuring ependymoma-like perivascular pseudorosettes, myxoid stroma, and elevated mitotic activity. Immunohistochemically, these tumors exhibit sparse glial fibrillary acidic protein expression while consistently demonstrating positive staining for vimentin and CD56. The defining molecular hallmark is a heterozygous ITD within exon 15 of the BCOR gene, with insertions ranging from 9 to 42 amino acids in length. BCOR immunohistochemistry reveals nuclear positivity in 97.9% of examined cases, although this finding is not pathognomonic for BCOR ITDs. This comprehensive review synthesizes data from all published cases of this novel tumor entity, providing a detailed analysis of clinical presentation, neuroimaging findings, histopathological features with differential diagnostic considerations, therapeutic approaches, and prognostic outcomes.

Original Article

Unraveling the crucial role of CCL3 in nasopharyngeal carcinoma: bioinformatics and immunohistochemical insights: Xiaopeng Guo, Zhen Sun, Ya Liang, Aoshuang Chang, Junjun Ling, Houyu Zhao, Xianlu Zhuo; J Pathol Transl Med. 2025;59(5):281-290. Published online September 8, 2025; DOI: https://doi.org/10.4132/jptm.2025.05.23

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Abstract PDF: Background
C-C motif chemokine ligand 3 (CCL3) is a crucial chemokine that plays a fundamental role in the immune microenvironment and is closely linked to the development of various cancers. Despite its importance, there is limited research regarding the expression and function of CCL3 in nasopharyngeal carcinoma (NPC). Therefore, this study seeks to examine the expression of CCL3 and assess its clinical significance in NPC using bioinformatics analysis and experiments. Methods: The bioinformatics approach was employed to assess the expression and function of CCL3 in NPC. Subsequently, protein expression of CCL3 was detected in an NPC cohort using immunohistochemistry based on a tissue microarray. The relationship between CCL3 expression and clinical features was then investigated. Results: A total of 20 CCL3-related genes and 14 possible target genes were identified through bioinformatics analysis, many of which play crucial roles in pathways such as chemokine signaling pathway and transcriptional misregulation in cancer signaling pathways. CCL3 was found to be associated with drug resistance and various immune cell infiltrations. In NPC, CCL3 expression was significantly higher than normal controls, and high expression of CCL3 correlated with cervical lymph node metastasis, tumor recurrence, advanced clinical stage, and poor prognosis. Conclusions: CCL3 may be a key gene in the initiation and progression of NPC. It has the potential to serve as both a diagnostic biomarker and a therapeutic target for NPC.

Reviews

A review of liver fibrosis and cirrhosis regression: Michael J. Lee; J Pathol Transl Med. 2023;57(4):189-195. Published online June 20, 2023; DOI: https://doi.org/10.4132/jptm.2023.05.24

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Abstract PDF

Cirrhosis has traditionally been considered an irreversible process of end-stage liver disease. With new treatments for chronic liver disease, there is regression of fibrosis and cirrhosis, improvement in clinical parameters (i.e. liver function and hemodynamic markers, hepatic venous pressure gradient), and survival rates, demonstrating that fibrosis and fibrolysis are a dynamic process moving in two directions. Microscopically, hepatocytes push into thinning fibrous septa with eventual perforation leaving behind delicate periportal spikes in the portal tracts and loss of portal veins. Obliterated portal veins during progressive fibrosis and cirrhosis due to parenchymal extinction, vascular remodeling and thrombosis often leave behind a bile duct and hepatic artery within the portal tract. Traditional staging classification systems focused on a linear, progressive process; however, the Beijing classification system incorporates both the bidirectional nature for the progression and regression of fibrosis. However, even with regression, vascular lesions/remodeling, parenchymal extinction and a cumulative mutational burden place patients at an increased risk for developing hepatocellular carcinoma and should continue to undergo active clinical surveillance. It is more appropriate to consider cirrhosis as another stage in the evolution of chronic liver disease as a bidirectional process rather than an end-stage, irreversible state.

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Inhibition of hepatic stellate cell activation by nutraceuticals: an emphasis on mechanisms of action
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Maria S. Zhigalova, Vladimir V. Kiselev, Alla A. Ryk, Petr A. Yartsev
Clinical nutrition and metabolism.2023; 4(4): 265. CrossRef

A standardized pathology report for gastric cancer: 2nd edition: Young Soo Park, Myeong-Cherl Kook, Baek-hui Kim, Hye Seung Lee, Dong-Wook Kang, Mi-Jin Gu, Ok Ran Shin, Younghee Choi, Wonae Lee, Hyunki Kim, In Hye Song, Kyoung-Mee Kim, Hee Sung Kim, Guhyun Kang, Do Youn Park, So-Young Jin, Joon Mee Kim, Yoon Jung Choi, Hee Kyung Chang, Soomin Ahn, Mee Soo Chang, Song-Hee Han, Yoonjin Kwak, An Na Seo, Sung Hak Lee, Mee-Yon Cho; J Pathol Transl Med. 2023;57(1):1-27. Published online January 15, 2023; DOI: https://doi.org/10.4132/jptm.2022.12.23

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21 Web of Science
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Abstract PDF Supplementary Material

The first edition of ‘A Standardized Pathology Report for Gastric Cancer’ was initiated by the Gastrointestinal Pathology Study Group of the Korean Society of Pathologists and published 17 years ago. Since then, significant advances have been made in the pathologic diagnosis, molecular genetics, and management of gastric cancer (GC). To reflect those changes, a committee for publishing a second edition of the report was formed within the Gastrointestinal Pathology Study Group of the Korean Society of Pathologists. This second edition consists of two parts: standard data elements and conditional data elements. The standard data elements contain the basic pathologic findings and items necessary to predict the prognosis of GC patients, and they are adequate for routine surgical pathology service. Other diagnostic and prognostic factors relevant to adjuvant therapy, including molecular biomarkers, are classified as conditional data elements to allow each pathologist to selectively choose items appropriate to the environment in their institution. We trust that the standardized pathology report will be helpful for GC diagnosis and facilitate large-scale multidisciplinary collaborative studies.

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Spatial and Temporal Tumor Heterogeneity in Gastric Cancer: Discordance of Predictive Biomarkers
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Journal of Gastric Cancer.2025; 25(1): 192. CrossRef
PD-L1 as a Biomarker in Gastric Cancer Immunotherapy
Yunjoo Cho, Soomin Ahn, Kyoung-Mee Kim
Journal of Gastric Cancer.2025; 25(1): 177. CrossRef
Korean Gastric Cancer Association-Led Nationwide Survey on Surgically Treated Gastric Cancers in 2023
Dong Jin Kim, Jeong Ho Song, Ji-Hyeon Park, Sojung Kim, Sin Hye Park, Cheol Min Shin, Yoonjin Kwak, Kyunghye Bang, Chung-sik Gong, Sung Eun Oh, Yoo Min Kim, Young Suk Park, Jeesun Kim, Ji Eun Jung, Mi Ran Jung, Bang Wool Eom, Ki Bum Park, Jae Hun Chung, S
Journal of Gastric Cancer.2025; 25(1): 115. CrossRef
A Comprehensive and Comparative Review of Global Gastric Cancer Treatment Guidelines: 2024 Update
Sang Soo Eom, Keun Won Ryu, Hye Sook Han, Seong-Ho Kong
Journal of Gastric Cancer.2025; 25(1): 153. CrossRef
Korea, Japan, Europe, and the United States: Why are guidelines for gastric cancer different?
Emily E. Stroobant, Seong-Ho Kong, Maria Bencivenga, Takahiro Kinoshita, Tae-Han Kim, Takeshi Sano, Giovanni de Manzoni, Han-Kwang Yang, Yuko Kitagawa, Vivian E. Strong
Gastric Cancer.2025; 28(4): 559. CrossRef
Can the Japanese guidelines for endoscopic submucosal dissection be safely applied to Korean gastric cancer patients? A multicenter retrospective study based on the Korean Gastric Cancer Association nationwide survey
Hayemin Lee, Mi Ryeong Park, Junhyun Lee
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Double optimal transport for differential gene regulatory network inference with unpaired samples
Mengyu Li, Bencong Zhu, Cheng Meng, Xiaodan Fan, Laura Cantini
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A Randomized Controlled Trial to Evaluate the Effect of Fibrin Glue on Bleeding after Gastric Endoscopic Submucosal Dissection
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Genomic and Transcriptomic Characterization of Gastric Cancer with Bone Metastasis
Sujin Oh, Soo Kyung Nam, Keun-Wook Lee, Hye Seung Lee, Yujun Park, Yoonjin Kwak, Kyu Sang Lee, Ji-Won Kim, Jin Won Kim, Minsu Kang, Young Suk Park, Sang-Hoon Ahn, Yun-Suhk Suh, Do Joong Park, Hyung Ho Kim
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Case Study

Composite chronic lymphocytic leukemia and mantle cell lymphoma involving the bone marrow: a case report and literature review: Roksolana Demianets, Susan O’Brien, Khosrow Mahdavi, Chenchen Niu, Sumayya Aslam, Truc Tran, Ying Zhang, Ashley Gamayo, Xiaohui Zhao, Sherif A. Rezk; J Pathol Transl Med. 2025;59(5):334-339. Published online September 8, 2025; DOI: https://doi.org/10.4132/jptm.2025.07.02

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Abstract PDF: Chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) is a clinically indolent lymphoproliferative disorder characterized by accumulation of mature B-cell lymphocytes. Given the common CD5 co-expression, mantle cell lymphoma (MCL) is one of the most important entities in the differential diagnosis. MCL and CLL/SLL might exhibit overlapping morphologic and immunohistochemical features, making diagnosis particularly difficult in cases of composite lymphomas. Here, we present a unique case of composite lymphoma in an 86-year-old male, along with a literature review on the immunophenotypic variability of both MCL and CLL, which should always be confirmed with additional ancillary cytogenetic and molecular studies.

Original Articles

National quality assurance program using digital cytopathology: a 5-year digital transformation experience by the Korean Society for Cytopathology: Yosep Chong, Hyeong Ju Kwon, Soon Auck Hong, Sung Soon Kim, Bo-Sung Kim, Younghee Choi, Yoon Jung Choi, Jung-Soo Pyo, Ji Yun Jeong, Soo Jin Jung, Hoon Kyu Oh, Seung-Sook Lee; J Pathol Transl Med. 2025;59(5):320-333. Published online September 15, 2025; DOI: https://doi.org/10.4132/jptm.2025.06.27

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95 Download

Abstract PDF: Background
Digital cytopathology (DC) is emerging as a transformative approach in quality assurance programs (QAP), though its comprehensive evaluation remains limited. Since 2020, the Korean Society for Cytopathology has progressively incorporated DC into its national QAP, including digital proficiency testing (PT), sample adequacy testing (SAT), a customizable PT module, and a self-assessment module (SAM), aiming for full digital implementation by 2026. Methods: This 5-year study assessed diagnostic concordance between conventional and digital PT formats and analyzed participant feedback on service quality and digital image usability across PT, SAT, and SAM. Parallel testing was conducted during the transitional phase, and satisfaction was measured through structured surveys. Results: Participation in digital PT increased from 48 institutions in 2020 to 93 in 2024, while digital SAT participation rose from 29 to 71 between 2022 and 2024. In 2023, 56 institutions joined SAM. Diagnostic concordance rates were comparable between digital and conventional PTs (78.6%–84.6% vs. 82.0%–85.1%), including similar category C (major discordance) rates. Satisfaction with digital PT services and image quality exceeded 85%, and over 90% of institutions reported positive feedback on SAT and SAM. Over 80% were satisfied with the customizable PT module. Conclusions: DC is a reliable and effective modality for cytopathology QAP. It demonstrates diagnostic equivalence to conventional methods and high user satisfaction, supporting its broader implementation in national quality assurance frameworks.

Evaluation of potential prognostic significance of JUNB in human prostate cancer: a bioinformatic and histopathological study: Noha R. Noufal, Einas M. Yousef, Mohamed Taha; J Pathol Transl Med. 2025;59(5):291-305. Published online September 8, 2025; DOI: https://doi.org/10.4132/jptm.2025.06.06

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107 Download

Abstract PDF Supplementary Material: Background
Prostate cancer is one of the most common malignancies in males worldwide. Serum prostate-specific antigen is a frequently employed biomarker in the diagnosis and risk stratification of prostate cancer; however, it is known for its low predictive accuracy for disease progression. New prognostic biomarkers are needed to distinguish aggressive prostate cancer from low-risk disease. This study aimed to identify and validate potential prognostic biomarkers of prostate cancer. Methods: Two prostate cancer datasets from the Gene Expression Omnibus were analyzed to identify differentially expressed genes between benign prostatic hyperplasia (BPH) and prostatic carcinoma. Immunohistochemistry was used to evaluate the JUNB proto-oncogene, a subunit of the AP-1 transcription factor (JUNB), in 70 prostate cancer patients and 10 BPH samples. Results: Our findings showed that JUNB was significantly enriched in prostate cancer-related pathways and biological processes. JUNB expression was considerably higher in prostatic adenocarcinoma patients than in BPH patients. Regarding JUNB expression in prostate cancer cases, lower levels of JUNB expression were associated with higher grades of prostatic adenocarcinoma. Lower JUNB expression was associated with a higher risk of prostatic adenocarcinoma progression and shorter overall survival. Conclusions: These results suggest that JUNB is a promising prognostic biomarker and a potential tumor suppressor in prostate cancer.

Adenomatoid odontogenic tumor: clinicopathological analysis of 34 cases from Karachi, Pakistan: Summaya Zafar, Sehar Sulaiman, Madeeha Nisar, Poonum Khan, Nasir Ud Din; J Pathol Transl Med. 2025;59(6):390-397. Published online October 16, 2025; DOI: https://doi.org/10.4132/jptm.2025.07.11

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Abstract PDF: Background
Adenomatoid odontogenic tumor (AOT) is a benign slow-growing neoplasm of odontogenic epithelial origin that is relatively uncommon. Only a few studies have described its histological features. Hence, we aimed to describe the clinicopathological features of AOT in a cohort of patients. Methods: AOT cases diagnosed between 2009 and 2024 were searched electronically. Glass slides were retrieved from archives and were reviewed by two pathologists to record the associated morphological features. Other data including patient demographics and tumor site were collected by reviewing histopathology reports. Results: The age of patients ranged from 9 to 44 years (mean, 17.7 years), and most were female (55.9%). The maxilla (44.1%) was the most common tumor site. Histologically, a predominantly solid growth pattern (n = 34) accompanied by ducts with a cuboidal/columnar epithelial lining (n = 31), eosinophilic secretions (n = 31), calcifications (n = 31), lattice work pattern (n = 30), and cystic areas (n = 20) were observed. Less frequent features included calcifying epithelial odontogenic tumor (CEOT)–like areas (n = 13), osteodentin (n = 6), association with impacted tooth (n = 3), mucin in tubules (n = 7), fibrocollagenous stroma (n = 6), mucin in ducts (n = 3) and ossifying fibroma-like areas (n = 6). The association of ducts with a cuboidal/columnar epithelial lining, lattice work pattern, calcifications, and eosinophilic secretions with gingival tumors was statistically significant (p ≤ .05). Additionally, tooth tumors were significantly associated with CEOT-like areas (p = .03). Conclusions: Our study confirms the trends in the clinicopathological features of AOT in previous case reports. Our results suggest that AOTs usually exhibit a predominantly solid pattern with duct-like spaces. Only a few cases with CEOT-like and ossifying fibroma-like areas were observed, similar to infrequent cases reported in the past.

Clinicopathological implications of miR-3127 in melanoma: Truong Phan-Xuan Nguyen, Minh-Khang Le, Chau M. Bui, Vuong Gia Huy; J Pathol Transl Med. 2025;59(6):371-381. Published online October 16, 2025; DOI: https://doi.org/10.4132/jptm.2025.07.08

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Abstract PDF Supplementary Material: Background
Cutaneous melanoma is the most lethal of all skin cancers. Recent studies suggested that miR-3127 is dysregulated in multiple tumor types and has important roles in tumorigenesis and cancer progression, giving it potential as a prognostic biomarker. The aim of this study was to use bioinformatic analysis to assess miR-3127 expression and correlate expression patterns with disease course in patients with cutaneous melanoma. Methods: miRNA, mRNA sequencing, DNA methylation data, and clinical information of cutaneous melanoma cases were downloaded from the Human Cancer Atlas – Skin Cutaneous Melanoma (TCGA-SKCM). miR-3127 expression was classified into miR-3127–low and miR-3127–high clusters using maximally selected rank statistics. Results: Clustering analysis showed that high expression of miR-3127 (≥20.3 reads per million) was associated with worse progression-free (p < .001) and overall (p = .011) survival compared to low miR-3127 expression. More than five thousand differentially expressed genes between the two miR-3127 sample groups encoded cell differentiation markers, cytokines, growth factors, translocated cancer genes, and oncogenes. Pathway analysis revealed that miR-3127–high samples related to activity of proliferation, DNA repair, and ultraviolet response. Conclusions: The expression level of miR-3127 could act as a prognostic indicator for patients with melanoma.

Newsletter

What’s new in medical renal pathology 2025: Updates on podocytopathy and immunofluorescence staining in medical kidney: Astrid Weins, Ibrahim Batal, Paola Romagnani, Geetika Singh, Rahul Raj, Nicole Andeen, Jonathan Zuckerman, Martina Uzzo, Mariam Priya Alexander, Anjali Satoskar; J Pathol Transl Med. 2025;59(4):269-272. Published online July 10, 2025; DOI: https://doi.org/10.4132/jptm.2025.06.19

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Abstract PDF: Diffuse podocytopathy, including minimal change disease and primary focal segmental glomerulosclerosis, is a common cause of nephrotic syndrome in adults and children. It is increasingly recognized to be autoimmune-mediated associated with anti-nephrin and other emerging anti-slit diaphragm antibodies, and can recur in the kidney allograft. Immunofluorescence is routinely used in evaluation of kidney biopsies, and updates include those on fibrillar diseases, monoclonal staining, lupus-like staining, and use of antibody KM55 in IgA-dominant glomerulonephritis.

Original Article

A single-institution demographic study of pathologically proven kidney disease in South Korea over the last 33 years: Hyejin Noh, Jiyeon Kim, Yeong Jin Choi; J Pathol Transl Med. 2025;59(5):306-319. Published online September 10, 2025; DOI: https://doi.org/10.4132/jptm.2025.06.18

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Abstract PDF Supplementary Material: Background
To date, epidemiological studies on the entire spectrum of kidney disease based on pathology have been rarely reported. Methods: A retrospective study was conducted on patients diagnosed with kidney disease at Seoul St. Mary's Hospital between 1991 and 2023. Results: Among 7,803 patients with native kidney disease, glomerular disease (70.3%) was the most common, followed by tubulointerstitial (15.1%) and vascular disease (8.8%). In kidney biopsy, glomerular disease (77.8%) showed the highest frequency, particularly in those under 20s (95.6%) (p = .013). Primary glomerulonephritis (GN) (72.8%) was the predominant glomerular disease, with IgA nephropathy (IgAN) (47.3%) being the most common one. Tubulointerstitial and vascular diseases increased with age, showing the highest prevalence in those over 60 years (p = .008 and p = .032, respectively). Glomerular disease was diagnosed at a younger age (39.7 ± 16.7 years) than tubulointerstitial (49.1 ± 16.2) and vascular (48.1 ± 15.3) diseases (p < .001). When glomerular diseases were classified morphologically, proliferative GN (57.9%) was the most common, followed by non-proliferative (39.6%) and sclerosing (1.6%). When classified by etiology, primary GN accounted for the most (72.8%), followed by secondary (19.3%) and hereditary GN (5.7%). In nephrectomy, tubulointerstitial disease (64.6%) was the most common. Those with a tubulointerstitial disease had a higher mean age than those with a glomerular disease (p < .001). In cases where nephrectomy was performed for glomerular diseases, IgAN (34.1%) was the most common diagnosis. Conclusions: Kidney disease has been increasing in South Korea for 33 years. Glomerular disease was the most common across all age groups, tubulointerstitial and vascular diseases increased over 60 years.

Newsletter

What’s new in dermatopathology 2023: WHO 5th edition updates: Jonathan Ho, Chico J Collie; J Pathol Transl Med. 2023;57(6):337-340. Published online October 17, 2023; DOI: https://doi.org/10.4132/jptm.2023.09.22

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17 Crossref

Abstract PDF

The 5th edition WHO Classification of Skin Tumors (2022) has introduced changes to nomenclature and diagnostics. Important differences are discussed below. Changes in each category of skin tumor have been detailed, with particular emphasis on meaningful advances in our understanding of the molecular pathogenesis of the skin’s diverse tumor landscape.

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Multiple Onychopapillomas and BAP1 Tumor Predisposition Syndrome
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Review

Cytologic hallmarks and differential diagnosis of papillary thyroid carcinoma subtypes: Agnes Stephanie Harahap, Chan Kwon Jung; J Pathol Transl Med. 2024;58(6):265-282. Published online November 7, 2024; DOI: https://doi.org/10.4132/jptm.2024.10.11

10,978 View
549 Download
6 Web of Science
7 Crossref

Abstract PDF

Papillary thyroid carcinoma (PTC) is the most common thyroid malignancy, characterized by a range of subtypes that differ in their cytologic features, clinical behavior, and prognosis. Accurate cytologic evaluation of PTC using fine-needle aspiration is essential but can be challenging due to the morphologic diversity among subtypes. This review focuses on the distinct cytologic characteristics of various PTC subtypes, including the classic type, follicular variant, tall cell, columnar cell, hobnail, diffuse sclerosing, Warthin-like, solid/trabecular, and oncocytic PTCs. Each subtype demonstrates unique nuclear features, architectural patterns, and background elements essential for diagnosis and differentiation from other thyroid lesions. Recognizing these distinct cytologic patterns is essential for identifying aggressive subtypes like tall cell, hobnail, and columnar cell PTCs, which have a higher risk of recurrence, metastasis, and poorer clinical outcomes. Additionally, rare subtypes such as diffuse sclerosing and Warthin-like PTCs present unique cytologic profiles that must be carefully interpreted to avoid diagnostic errors. The review also highlights the cytologic indicators of lymph node metastasis and high-grade features, such as differentiated high-grade thyroid carcinoma. The integration of molecular testing can further refine subtype diagnosis by identifying specific genetic mutations. A thorough understanding of these subtype-specific cytologic features and molecular profiles is vital for accurate diagnosis, risk stratification, and personalized management of PTC patients. Future improvements in diagnostic techniques and standardization are needed to enhance cytologic evaluation and clinical decision-making in thyroid cancer.

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Nuclear pseudoinclusion is associated with BRAFV600E mutation: Analysis of nuclear features in papillary thyroid carcinoma
Agnes Stephanie Harahap, Dina Khoirunnisa, Salinah, Maria Francisca Ham
Annals of Diagnostic Pathology.2025; 75: 152434. CrossRef
2025 Korean Thyroid Association Clinical Management Guideline on Active Surveillance for Low-Risk Papillary Thyroid Carcinoma
Eun Kyung Lee, Min Joo Kim, Seung Heon Kang, Bon Seok Koo, Kyungsik Kim, Mijin Kim, Bo Hyun Kim, Ji-hoon Kim, Shin Je Moon, Kyorim Back, Young Shin Song, Jong-hyuk Ahn, Hwa Young Ahn, Ho-Ryun Won, Won Sang Yoo, Min Kyoung Lee, Jeongmin Lee, Ji Ye Lee, Kyo
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Case Study

Cytological characteristics of Müllerian adenosarcoma of the uterine corpus: a case report and literature review: Junko Kuramoto, Chihiro Matsubara, Yasuko Sasamoto, Hitomi Tsukada, Shigemichi Hirose; J Pathol Transl Med. 2025;59(5):340-347. Published online September 11, 2025; DOI: https://doi.org/10.4132/jptm.2025.08.11

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76 Download

Abstract PDF: Müllerian adenosarcoma of the uterus is a rare morphological variant of uterine sarcoma. Müllerian adenosarcoma has been described histologically, though it is rare in the cytological literature. This report describes the cytological findings of a case of adenosarcoma arising from the endometrium. The patient was a Japanese woman in her 40s. Endometrial cytological and histological findings were observed for 5 years, from the appearance of a polypoid lesion until adenosarcoma was suspected, and then hysterectomy was performed. Based on these longitudinal cytological and histological observations, it was possible to identify the cytological characteristics of adenosarcoma: decrease in the glandular-to-stromal ratio; increase in stromal cell density; and progression of stromal cell atypia. This case stresses the importance and usefulness of endometrial cytology in the identification of the sarcomatous component in adenosarcoma.

Original Article

Spectrum of thyroiditis types: clinical, cytomorphological, and radiological findings: Anam Singh, Indrajeet Kundu; J Pathol Transl Med. 2025;59(6):421-433. Published online November 6, 2025; DOI: https://doi.org/10.4132/jptm.2025.08.13

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Abstract PDF: Background
Thyroiditis encompasses a range of inflammatory conditions affecting the thyroid gland. Lymphocytic thyroiditis (LT) is a common form of thyroiditis, with acute suppuration of the thyroid, while tuberculous thyroiditis is relatively rare. Fine-needle aspiration cytology (FNAC) remains a safe and cost-effective tool for diagnosing thyroid-related diseases, especially when paired with ultrasound (US) and clinical examination. Methods: This is a cross-sectional study including 21 cases. The cases were reported as thyroiditis on US and FNAC, and the findings were correlated with patient clinical history, symptoms during presentation, and serological profiles. Results: The cases of thyroiditis encompassed the more common forms, LT and subacute granulomatous thyroiditis (SAT), as well as relatively rare forms like tuberculous thyroiditis and thyroid abscess. Cases of follicular neoplasms (FN) arising in the context of LT also are included in this study. The case of tuberculous thyroiditis presented as a bulky thyroid gland that appeared heterogeneous on US with extensive necrosis on FNAC. The cases of thyroid abscess and SAT presented with painful neck swellings, with granulomas in the latter cases. US features of LT showed an array of appearances ranging from pseudonodular to an atrophic thyroid gland. All cases of FN showed a lymphocytic background. Conclusions: Thyroiditis is a commonly encountered condition that needs to be sub-categorized accurately into acute, subacute, and chronic types for appropriate clinical management, as they can sometimes show overlapping features. Though rare, acute suppurative and tuberculous thyroiditis are often encountered and warrant immediate care and treatment.

Review Article

Breast schwannoma: review of entity and differential diagnosis: Sandra Ixchel Sanchez, Ashley Cimino-Mathews; J Pathol Transl Med. 2025;59(6):353-360. Published online November 3, 2025; DOI: https://doi.org/10.4132/jptm.2025.08.12

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Abstract PDF: Schwannomas are benign peripheral nerve sheath tumors composed of Schwann cells, which uncommonly involve the breast. Most breast schwannomas are clinically present as a superficial palpable breast mass but may also be detected on screening mammography. Excision is the preferred treatment if symptomatic, and these are not known to recur. Histomorphology is similar to other anatomic sites: bland spindle cells with wavy nuclei, nuclear palisading (Verocay bodies), variably hypercellular (Antoni A) and hypocellular (Antoni B) areas, myxoid stroma, hyalinized vessels and variable cystic degeneration. Classic immunohistochemistry is diffuse and strong labeling for S100 and Sox10. Notable diagnostic pitfalls specific to the breast include myofibroblastoma, particularly the palisaded variant, and fascicular pseudoangiomatous stromal hyperplasia.

Case Study

Clinicopathological characteristics of digestive system angioleiomyomas: case report and literature review: Georgios Kalliopitsas, Christos Topalidis, Constantine Halkias, Theodora Gkeka, Konstantinos Sapalidis, Triantafyllia Koletsa; J Pathol Transl Med. 2025;59(6):453-459. Published online October 28, 2025; DOI: https://doi.org/10.4132/jptm.2025.08.04

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Abstract PDF: Angioleiomyomas are benign soft tissue tumors originating from the vascular wall. Although angioleiomyomas mainly occur in extremities, followed by head, neck, and trunk, they can also be found throughout the digestive system and especially in the oral cavity. Herein, the fourth case of a rectal angioleiomyoma in the English literature is reported and the clinicopathological features of digestive system angioleiomyomas were investigated. In contrast to their soft tissue counterparts, digestive system angioleiomyomas mainly affect males at a slightly younger age. Angioleiomyomas are mainly asymptomatic and only rarely elicit pain. Clinicians consider angioleiomyomas infrequently and instead include more common soft tissue or epithelial tumors in their differential diagnosis. To prevent angiomyolipoma misdiagnosis, pathologists should exercise caution when examining an angioleiomyoma composed of adipose tissue, smooth muscle, and blood vessels. Pathologists, radiologists, and surgeons should be aware that angioleiomyomas can occur in the digestive system.

Review

Aneurysmal bone cyst: a review: Elham Nasri, John David Reith; J Pathol Transl Med. 2023;57(2):81-87. Published online March 14, 2023; DOI: https://doi.org/10.4132/jptm.2023.02.23

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Abstract PDF

Aneurysmal bone cyst (ABC) is a benign locally destructive bone neoplasm composed of multi-loculated blood-filled cystic spaces. The most common sites of involvement are the meta-diaphysis of the long bones and posterior elements of the vertebrae. Secondary, ABC-like changes can complicate a variety of other benign and malignant primary bone neoplasms, including giant cell tumor, fibrous dysplasia, and osteosarcoma. About two-third of primary ABCs have a rearrangement of the USP6 gene, which is not present in the ABC-like changes that occur secondary to other primary bone tumors (i.e., secondary ABC). Primary ABC of bone carries a variable but generally high rate of local recurrence. This paper provides an overview of the pathophysiology, clinical presentation, radiographic and pathologic findings, treatment, and prognosis of ABC.

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Original Article

Diagnostic value of cytology in detecting human papillomavirus–independent cervical malignancies: a nation-wide study in Korea: Hye-Ra Jung, Junyoung Shin, Chong Woo Yoo, Eun Na Kim, Cheol Lee, Kyeongmin Kim, Ho-chang Lee, Yonghee Lee, Ji Hye Kim, Soo Jin Jung, Yumin Chung, Joo Yeon Kim, Hye Eun Park, Tae Hoen Kim, Wonae Lee, Min-Sun Cho, Ran Hong, Yoon Jung Choi, Younghee Choi, Young Sub Lee, Sang-Ryung Lee, Myunghee Kang, Young Jin Seo, Seung-Sook Lee, Yoon-Jung Hwang, Hyun-Jung Kim; J Pathol Transl Med. 2025;59(6):444-452. Published online November 11, 2025; DOI: https://doi.org/10.4132/jptm.2025.10.21

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Abstract PDF: Background
Human papillomavirus (HPV) independent cervical malignancies (HPV-IDCMs) have recently been classified by the World Health Organization (WHO) 5th edition. These malignancies have historically received limited attention due to their rarity and the potential for evasion of HPV-based screening.
Methods
We retrospectively reviewed 5,854 biopsy-confirmed cervical malignancies from 22 institutions over 3 years (July 2020–June 2023). Histologic classification followed the WHO guidelines. HPV independence was confirmed by dual negativity for p16 and HPV; discordant cases (p16-positive/HPV-negative) underwent additional HPV testing using paraffin-embedded tissue. Cytological results were matched sequentially to histological confirmation.
Results
The prevalence of HPV-IDCM was 4.4% (257/5,854) overall and was 3.6% (208/5,805 cases) among primary cervical malignancy. Patient age of HPV-IDCM was 29 to 89 years (median, 57.79). Its histologic subtypes included primary adenocarcinoma (n = 116), endometrial adenocarcinoma (n = 35), squamous cell carcinoma (n = 72), metastatic carcinoma (n = 14), carcinoma, not otherwise specified (n = 10), neuroendocrine carcinoma (n = 3), and others (n = 7). Among 155 cytology-histological matched cases, the overall and primary Pap test detection rates were 85.2% (132/155) and 83.2% (104/125), respectively. The interval between cytology and histologic confirmation extended up to 38 months.
Conclusions
HPV-IDCMs comprised 3.6% of primary cervical malignancies with a high detection rate via cytology (83.2%). These findings affirm the value of cytological screening, particularly in patients with limited screening history or at risk for HPV-independent lesions, and may guide future screening protocols.

Review Article

Recent topics on thyroid cytopathology: reporting systems and ancillary studies: Mitsuyoshi Hirokawa, Ayana Suzuki; J Pathol Transl Med. 2025;59(4):214-224. Published online June 30, 2025; DOI: https://doi.org/10.4132/jptm.2025.04.18

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Abstract PDF: As fine-needle aspiration techniques and diagnostic methodologies for thyroid nodules have continued to evolve and reporting systems have been updated accordingly, we need to be up to date with the latest information to achieve accurate diagnoses. However, the diagnostic approaches and therapeutic strategies for thyroid nodules vary across laboratories and institutions. Several differences exist between Western and Eastern practices regarding thyroid fine-needle aspiration. This review describes the reporting systems for thyroid cytopathology and ancillary studies. Updated reporting systems enhance the accuracy, consistency, and clarity of cytology reporting, leading to improved patient outcomes and management strategies. Although a single global reporting system is optimal, reporting systems tailored to each country is acceptable. In such cases, compatibility must be ensured to facilitate data sharing. Ancillary methods include liquid-based cytology, immunocytochemistry, biochemical measurements, flow cytometry, molecular testing, and artificial intelligence, all of which improve diagnostic accuracy. These methods continue to evolve, and cytopathologists should actively adopt the latest methods and information to achieve more accurate diagnoses. We believe this review will be useful to practitioners of routine thyroid cytology.

Original Articles

International Academy of Cytology standardized reporting of breast fine-needle aspiration cytology with cyto-histopathological correlation of breast carcinoma: Shweta Pai; J Pathol Transl Med. 2024;58(5):241-248. Published online September 13, 2024; DOI: https://doi.org/10.4132/jptm.2024.07.14

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Abstract PDF: Background
The International Academy of Cytology (IAC) has developed a standardized approach for reporting the findings of breast fine-needle aspiration cytology (FNAC). Accordingly, there are five chief categories of breast lesions, C1 (insufficient material), C2 (benign), C3 (atypical), C4 (suspicious), and C5 (malignant). The prognostication and management of breast carcinoma can be performed readily on the basis of this classification system. The aim of this study was to classify various breast lesions into one of the above-named categories and to further grade the C5 lesions specifically using the Robinson system. The latter grades were then correlated with modified Scarff-Bloom-Richardson (SBR) grades.
Methods
This retrospective study was undertaken in the pathology department of a hospital located in the urban part of the city of Bangalore. All FNAC procedures performed on breast lumps spanning the year 2020 were included in the study.
Results
A total of 205 breast lesions was classified according to the IAC guidelines into C1 (6 cases, 2.9%), C2 (151 cases, 73.7%), C3 (13 cases, 6.3%), C4 (5 cases, 2.5%), and C5 (30 cases, 14.6%) groups. The C5 cases were further graded using Robinson’s system. The latter showed a significant correlation with the SBR system (concordance=83.3%, Spearman correlation=0.746, Kendall’s tau-b=0.736, kappa=0.661, standard error=0.095, p≤.001).
Conclusions
A standardized approach for FNAC reporting of breast lesions, as advocated for by the IAC, improves the quality and clarity of the reports and assures diagnostic reproducibility on a global scale. Further, the cytological grading of C5 lesions provides reliable cyto-prognostic scores that can help assess a tumor’s aggressiveness and predict its histological grade.

E-cadherin expression and tumor-stroma ratio as prognostic biomarkers of peritoneal recurrence in advanced gastric cancer: a digital image analysis-based stratification study: Somang Lee, Binnari Kim; J Pathol Transl Med. 2025;59(6):408-420. Published online November 6, 2025; DOI: https://doi.org/10.4132/jptm.2025.08.27

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Abstract PDF: Background
Gastric cancer remains a significant global health burden, with a high peritoneal recurrence rates after curative surgery. E-cadherin and the tumor-stroma ratio (TSR) have been proposed as prognostic indicators, but their combined prognostic utility remains unclear. Methods: This retrospective study included 130 patients with T3/T4a gastric cancer who underwent curative gastrectomy at Ulsan University Hospital between 2014 and 2019. Immunohistochemistry for E-cadherin and Vimentin was performed. Digital image analysis using QuPath’s object classifier quantified E-cadherin expression and TSR. Results: Low E-cadherin expression was associated with diffuse-type histology and advanced T stage. Low TSR was linked to younger age, female sex, and XELOX treatment. In Kaplan-Meier analysis, low TSR showed a non-significant trend toward higher peritoneal recurrence (p = .054), while low E-cadherin expression was significantly associated with increased peritoneal recurrence (p = .002). Combined biomarker analysis also revealed a significant difference in recurrence-free survival (RFS) among the four groups (p = .005); patients with both high TSR and high E-cadherin expression experienced the most favorable RFS. In multivariable analysis, E-cadherin expression remained the only independent predictor of peritoneal recurrence (high vs. low; hazard ratio, 0.348; 95% confidence interval, 0.149 to 0.816; p = .015). Conclusions: E-cadherin and TSR reflect distinct tumor biology such as epithelial integrity and stromal composition, and their combined evaluation improves prognostic stratification. Digital image analysis enhances reproducibility and objectivity, supporting their integration into clinical workflows.

Review

Breast fine-needle aspiration cytology in the era of core-needle biopsy: what is its role?: Ahrong Kim, Hyun Jung Lee, Jee Yeon Kim; J Pathol Transl Med. 2025;59(1):26-38. Published online January 15, 2025; DOI: https://doi.org/10.4132/jptm.2024.11.01; Correction in: J Pathol Transl Med 2025;59(2):147

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Abstract PDF

Fine-needle aspiration cytology (FNAC) has long been recognized as a minimally invasive, cost-effective, and reliable diagnostic tool for breast lesions. However, with the advent of core-needle biopsy (CNB), the role of FNAC has diminished in some clinical settings. This review aims to re-evaluate the diagnostic value of FNAC in the current era, focusing on its complementary use alongside CNB, the adoption of new approaches such as the International Academy of Cytology Yokohama System, and the implementation of rapid on-site evaluation to reduce inadequate sample rates. Advances in liquid-based cytology, receptor expression testing, molecular diagnostics, and artificial intelligence are discussed, highlighting their potential to enhance the diagnostic accuracy of FNAC. Despite challenges, FNAC remains a valuable diagnostic method, particularly in low-resource settings and specific clinical scenarios, and its role continues to evolve with technology.

Citations

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Bulk-lysis protocols as a sensitive method for investigation of circulating CK19 cells in the peripheral blood of patients with breast cancer by flow cytometry
Daniella Serafin Couto Vieira, Laura Otto Walter, Maria Eduarda Cunha da Silva, Lisandra de Oliveira Silva, Heloísa Zorzi Costa, Chandra Chiappin Cardoso, Fernando Carlos de Lander Schmitt, Maria Cláudia Santos-Silva
Analytical Methods.2025; 17(23): 4771. CrossRef

Newsletter

What’s new in genitourinary pathology 2023: WHO 5th edition updates for urinary tract, prostate, testis, and penis: Bonnie Choy, Maria Tretiakova, Debra L. Zynger; J Pathol Transl Med. 2024;58(1):45-48. Published online December 27, 2023; DOI: https://doi.org/10.4132/jptm.2023.12.11

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Abstract PDF

The 5th edition WHO Classification of Urinary and Male Genital Tumours (2022) introduced many significant changes relevant to urologic daily practice, mainly to renal tumors which was covered in the What’s New newsletter in September 2022. In this newsletter, we summarize the notable changes to bladder, prostate, testis, and penis based on the 5th edition of the WHO.

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Predicting variant histology in bladder cancer: the role of multiparametric MRI and vesical imaging-reporting and data system (VI-RADS)
Serdar Aslan, Merve Nur Tasdemir, Ertugrul Cakir, Ural Oguz, Birgul Tok
Abdominal Radiology.2025; 50(10): 4700. CrossRef
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Yuki Arita, Sungmin Woo, Lisa Ruby, Thomas C. Kwee, Keisuke Shigeta, Ryo Ueda, Sunny Nalavenkata, Hiromi Edo, Kosuke Miyai, Jeeban Das, Pamela I. Causa Andrieu, Hebert Alberto Vargas
Abdominal Radiology.2024; 49(8): 2797. CrossRef
Oncological outcomes and prognostic implications of T1 histo-anatomic substaging in the management of high-Grade non-muscle invasive bladder cancer: results from a large single centre series
Marco Finati, Antonio Fanelli, Francesco Cinelli, Nicola Schiavone, Ugo Giovanni Falagario, Anna Ricapito, Nicola d’Altilia, Richard Naspro, Angelo Porreca, Felice Crocetto, Biagio Barone, Ciro Imbimbo, Carlo Bettocchi, Francesca Sanguedolce, Luigi Cormio
World Journal of Urology.2024;[Epub] CrossRef

Case Study

Primary thyroid diffuse large B-cell lymphoma: fine needle aspiration and histological correlation: Woo Sung Moon, Yong Tae Hong, Ae Ri Ahn; J Pathol Transl Med. 2025;59(6):467-471. Published online November 3, 2025; DOI: https://doi.org/10.4132/jptm.2025.08.28

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Abstract PDF: Primary thyroid lymphoma (PTL) is a rare type of cancer that arises within the thyroid gland, representing about 2%–8% of all thyroid malignancies. Fine-needle aspiration cytology is commonly used as the first-line diagnostic approach for thyroid nodules and can assist in identifying PTL when suggestive features are present. Herein, we report the case of a 59-year-old female patient who presented with a rapidly enlarging anterior neck mass over 20 days. Clinically, the case was challenging to distinguish from anaplastic thyroid carcinoma because of the sudden enlargement of the neck mass. However, pathological examination confirmed the diagnosis of primary thyroid diffuse large B-cell lymphoma. Fine-needle aspiration cytology proved valuable in avoiding unnecessary surgical resection and guiding appropriate treatment. Additionally, we provide a brief review of the clinical and cytopathological features of primary thyroid lymphomas.

Review

Cervical intraepithelial neoplasia and cervical cytology in pregnancy: Ji-Young Kim, Jeong Yun Shim; J Pathol Transl Med. 2024;58(6):283-290. Published online November 7, 2024; DOI: https://doi.org/10.4132/jptm.2024.10.17

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Abstract PDF

Cervical cancer screening during pregnancy presents unique challenges for cytologic interpretation. This review focuses on pregnancy-associated cytomorphological changes and their impact on diagnosis of cervical intraepithelial neoplasia (CIN) and cervical cancer. Pregnancy-induced alterations include navicular cells, hyperplastic endocervical cells, immature metaplastic cells, and occasional decidual cells or trophoblasts. These changes can mimic abnormalities such as koilocytosis, adenocarcinoma in situ, and high-grade squamous intraepithelial lesions, potentially leading to misdiagnosis. Careful attention to nuclear features and awareness of pregnancy-related changes are crucial for correct interpretation. The natural history of CIN during pregnancy shows higher regression rates, particularly for CIN 2, with minimal risk of progression. Management of abnormal cytology follows modified risk-based guidelines to avoid invasive procedures, with treatment typically deferred until postpartum. The findings reported in this review emphasize the importance of considering pregnancy status in cytological interpretation, highlight potential problems, and provide guidance on differentiating benign pregnancy-related changes from true abnormalities. Understanding these nuances is essential for accurate diagnosis and proper management of cervical abnormalities in pregnant women.

Citations

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The significance of biological samples from pregnant women in cervical intraepithelial neoplasia
Xue Mi, Maharjan Rashmi, Zangyu Pan, Di Wu, Jinwei Miao
Frontiers in Medicine.2025;[Epub] CrossRef
Oncologic and pregnancy outcomes of cervical high-grade intraepithelial lesions and delivery mode
Olga P. Matylevich, Ilya A. Tarasau, Sviatlana Y. Shelkovich, Aliaksandr F. Martsinkevich
Academia Oncology.2025;[Epub] CrossRef

Case Study

Diagnostic challenge in Burkitt lymphoma of the mandible initially misdiagnosed as osteomyelitis: a case report: Jiwon Do, Jin-Young Choi; J Pathol Transl Med. 2025;59(6):460-466. Published online November 14, 2025; DOI: https://doi.org/10.4132/jptm.2025.09.18

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Abstract PDF: Burkitt lymphoma (BL) is a highly aggressive B-cell neoplasm that rarely involves the mandible in elderly without apparent immunodeficiency. We report a case of a 72-year-old male who presented with persistent mandibular pain following extraction of tooth #46. Initial imaging findings were consistent with incipient osteomyelitis, and the patient was treated with antibiotics. Despite treatment, pain persisted, and follow-up imaging revealed swelling and diffusion restriction in the lateral pterygoid muscle without evidence of a distinct mass. Biopsy revealed BL confirmed by immunohistochemistry: CD10+, BCL6+, c-MYC+, Ki-67 >95%, and negative for BCL2, MUM-1, and Epstein-Barr virus. Although c-MYC immunopositivity was demonstrated, fluorescence in situ hybridization for MYC rearrangement could not be performed due to limited tissue, representing a diagnostic limitation. Notably, the patient had no trismus despite deep muscle involvement, but complained of facial paresthesia and showed remote swelling in the scapular area during hospitalization. Systemic staging with imaging, cerebrospinal fluid cytology, and imaging revealed disseminated nodal and extranodal involvement including the central nervous system, corresponding to stage IV disease by Lugano classification. This case highlights the diagnostic challenge of distinguishing lymphoma from osteomyelitis and underscores the importance of considering malignancy in cases of refractory mandibular inflammation with atypical features.

Reviews

Perspectives on single-nucleus RNA sequencing in different cell types and tissues: Nayoung Kim, Huiram Kang, Areum Jo, Seung-Ah Yoo, Hae-Ock Lee; J Pathol Transl Med. 2023;57(1):52-59. Published online January 10, 2023; DOI: https://doi.org/10.4132/jptm.2022.12.19

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33 Crossref

Abstract PDF

Single-cell RNA sequencing has become a powerful and essential tool for delineating cellular diversity in normal tissues and alterations in disease states. For certain cell types and conditions, there are difficulties in isolating intact cells for transcriptome profiling due to their fragility, large size, tight interconnections, and other factors. Single-nucleus RNA sequencing (snRNA-seq) is an alternative or complementary approach for cells that are difficult to isolate. In this review, we will provide an overview of the experimental and analysis steps of snRNA-seq to understand the methods and characteristics of general and tissue-specific snRNA-seq data. Knowing the advantages and limitations of snRNA-seq will increase its use and improve the biological interpretation of the data generated using this technique.

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Post-transplant liver biopsies: a concise and practical approach for beginners: Mohamad Besher Ourfali, David Hirsch, Marianna Scranton, Tony El Jabbour; J Pathol Transl Med. 2025;59(1):1-10. Published online January 15, 2025; DOI: https://doi.org/10.4132/jptm.2024.11.15

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Abstract PDF

Exposure to post-transplant liver biopsies varies among pathology residencies and largely depends on the institution's training program, particularly if the hospital has a liver transplant program. The interpretation of biopsies from transplanted livers presents its own set of challenges, even for those with a solid understanding of non-transplant medical liver biopsies. In this review, we aim to provide a succinct, step-by-step approach to help you interpret liver transplant biopsies. This article may be beneficial for residents interested in liver pathology, gastrointestinal and liver pathology fellows in the early stages of training, clinical gastroenterology and hepatology fellows, hepatologists and general pathologists who are curious about this niche.

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Histological and Molecular Evaluation of Liver Biopsies: A Practical and Updated Review
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Original Articles

Modified plasma-thrombin method using patient-derived plasma for cell block preparation in endobronchial ultrasound–guided transbronchial fine-needle aspiration: Xizhe Zhang, Chunli Tang, Yingying Gu, Zeyun Lin, Shiqi Tang, Anzi Tan, Mengshi Li, Zhucheng Chen, Yuying Chen, Shi-yue Li, Juhong Jiang; J Pathol Transl Med. 2025;59(6):434-443. Published online November 11, 2025; DOI: https://doi.org/10.4132/jptm.2025.08.20

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Abstract PDF: Background
The plasma-thrombin method, which uses expired blood bank plasma as an ancillary component, has been widely used in cell block (CB) preparation. However, the application of expired blood bank plasma raises concerns about nucleic acid contamination. This study investigated the feasibility of using patient-derived plasma as a substitute for blood bank plasma in the modified plasma-thrombin (MPT) method for CB preparation in endobronchial ultrasound–guided transbronchial needle aspiration (EBUS-TBNA) samples. Methods: A prospective study was conducted to compare the adequacy of CB preparation between a previously used self-clotting (SC) method and the MPT method. The EBUS-TBNA specimens from each targeted lesion were divided into paired samples: one processed using the SC method and the other using the MPT method, substituting the blood bank plasma with patient-derived plasma. Results: A total of 82 paired EBUS-TBNA samples from 59 patients were analyzed. The diagnostic yield of the SC method and the MPT method was 86.6% and 97.6%, respectively. Among patients diagnosed with non–small cell lung cancer, the adequacy rate for molecular testing was 79.2% with the SC method and 91.7% with the MPT method. Conclusions: The MPT method significantly improved the cellular yield of EBUS-TBNA–derived CBs. Using patient-derived fresh plasma rather than expired blood bank plasma avoids a known contamination risk. The additional step modestly prolongs the procedure and introduces minimal risks by vein puncture. This approach is generally considered cost-effective.

AMACR is a highly sensitive and specific immunohistochemical marker for diagnosing prostate cancer on biopsy: a systematic review and meta-analysis: Johannes Cansius Prihadi, Stevan Kristian Lionardi, Nicolas Daniel Widjanarko, Steven Alvianto, Fransiskus Xaverius Rinaldi, Archie Fontana Iskandar; J Pathol Transl Med. 2025;59(4):235-248. Published online July 3, 2025; DOI: https://doi.org/10.4132/jptm.2025.04.16

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Abstract PDF Supplementary Material: Background
Alpha-methylacyl-CoA racemase (AMACR) is the preferred biomarker for distinguishing malignant from benign glands in prostate biopsies, showing high sensitivity and specificity for prostate cancer. A meta-analysis of immunohistochemistry (IHC) for AMACR is essential to further assess its diagnostic accuracy across diverse sample sources. Methods: A systematic search of databases including MEDLINE, ScienceDirect, ProQuest, Google Scholar, and the Cochrane Library was performed, focusing on studies of AMACR to diagnose prostate cancer, particularly in biopsy samples analyzed through IHC over the last 20 years. Quality of studies was assessed using the Quality Assessment of Diagnostic Accuracy Studies 2 tool, followed by a meta-analysis of regions and subgroups to calculate summary estimates of diagnostic test accuracy. Results: In the final analysis, 37 studies, with a pooled size of 5,898 samples, were included from the examination of 94 full-text papers. Among them, 27 studies with similar sample sources and testing methodologies underwent meta-analysis, yielding a combined sensitivity estimate of 0.90 (95% confidence interval [CI], 0.86 to 0.93) and specificity of 0.91 (95% CI, 0.83 to 0.95), both with significant heterogeneity (p < .01). The region beneath the hierarchical summary receiver operating characteristic curve was 0.95 (95% CI, 0.93 to 0.97), positive likelihood ratio was 9.6 (95% CI, 5.3 to 17.4), negative likelihood ratio was 0.11 (95% CI, 0.08 to 0.15), and diagnostic odds ratio was 88 (95% CI, 42 to 181). Conclusions: Our meta-analysis findings substantiate AMACR as a highly accurate tool for diagnosing prostate cancer, specifically in biopsy samples, via immunohistochemical staining. Further studies involving diverse samples are needed to enhance our understanding of the AMACR diagnostic accuracy in a range of clinical settings.

Review

Interpretation of PD-L1 expression in gastric cancer: summary of a consensus meeting of Korean gastrointestinal pathologists: Soomin Ahn, Yoonjin Kwak, Gui Young Kwon, Kyoung-Mee Kim, Moonsik Kim, Hyunki Kim, Young Soo Park, Hyeon Jeong Oh, Kyoungyul Lee, Sung Hak Lee, Hye Seung Lee; J Pathol Transl Med. 2024;58(3):103-116. Published online April 25, 2024; DOI: https://doi.org/10.4132/jptm.2024.03.15

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Abstract PDF Supplementary Material

Nivolumab plus chemotherapy in the first-line setting has demonstrated clinical efficacy in patients with human epidermal growth factor receptor 2–negative advanced or metastatic gastric cancer, and is currently indicated as a standard treatment. Programmed death-ligand 1 (PD-L1) expression is an important biomarker for predicting response to anti–programmed death 1/PD-L1 agents in several solid tumors, including gastric cancer. In the CheckMate-649 trial, significant clinical improvements were observed in patients with PD-L1 combined positive score (CPS) ≥ 5, determined using the 28-8 pharmDx assay. Accordingly, an accurate interpretation of PD-L1 CPS, especially at a cutoff of 5, is important. The CPS method evaluates both immune and tumor cells and provides a comprehensive assessment of PD-L1 expression in the tumor microenvironment of gastric cancer. However, CPS evaluation has several limitations, one of which is poor interobserver concordance among pathologists. Despite these limitations, clinical indications relying on PD-L1 CPS are increasing. In response, Korean gastrointestinal pathologists held a consensus meeting for the interpretation of PD-L1 CPS in gastric cancer. Eleven pathologists reviewed 20 PD-L1 slides with a CPS cutoff close to 5, stained with the 28-8 pharmDx assay, and determined the consensus scores. The issues observed in discrepant cases were discussed. In this review, we present cases of gastric cancer with consensus PD-L1 CPS. In addition, we briefly touch upon current practices and clinical issues associated with assays used for the assessment of PD-L1 expression in gastric cancer.

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Adjuvant immunotherapy in patients with resected gastric and oesophagogastric junction cancer following preoperative chemotherapy with high risk for recurrence (ypN+ and/or R1): European Organisation of Research and Treatment of Cancer (EORTC) 1707 VESTIG
F. Lordick, M.E. Mauer, G. Stocker, C.A. Cella, I. Ben-Aharon, G. Piessen, L. Wyrwicz, G. Al-Haidari, T. Fleitas-Kanonnikoff, V. Boige, R. Lordick Obermannová, U.M. Martens, C. Gomez-Martin, P. Thuss-Patience, V. Arrazubi, A. Avallone, K.K. Shiu, P. Artru
Annals of Oncology.2025; 36(2): 197. CrossRef
PD-L1 as a Biomarker in Gastric Cancer Immunotherapy
Yunjoo Cho, Soomin Ahn, Kyoung-Mee Kim
Journal of Gastric Cancer.2025; 25(1): 177. CrossRef
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Mojdeh Soltani, Mohammad Abbaszadeh, Hamed Fouladseresht, Mark J. M. Sullman, Nahid Eskandari
Clinical and Experimental Medicine.2025;[Epub] CrossRef
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D.R. Castillo, M. Guo, P. Shah, M. Hazeltin, D. Tai, F. Al-Manaseer, S. Mlamba, D. Perez, S. Yeremian, S. Guzman, R. Mannan, C. Crook, C. Lau, N. Tawar, G. Brar, M. Raoof, Y. Woo, S.P. Wu, D. Li
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Original Article

Single umbilical artery and associated birth defects in perinatal autopsies: prenatal diagnosis and management: Manushree Saxena, Bhagyashri Hungund; J Pathol Transl Med. 2024;58(5):214-218. Published online July 9, 2024; DOI: https://doi.org/10.4132/jptm.2024.07.03

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Abstract PDF

Background
The umbilical cord forms the connection between the fetus and the placenta at the feto-maternal interface and normally comprises two umbilical arteries and one umbilical vein. In some cases, only a single umbilical artery (SUA) is present. This study was conducted to evaluate associations between SUA and other congenital malformations discovered in perinatal autopsies and to ascertain the existence of preferential associations between SUA and certain anomalies.
Methods
We evaluated records of all fetuses sent for autopsy to the Department of Pathology during the 10-year period from 2013 through 2022 (n = 1,277). The data were obtained from the hospital’s pathology laboratory records. The congenital anomalies were grouped by organ or system for analysis and included cardiovascular, urinary tract, nervous system, gastrointestinal tract, musculoskeletal, and lung anomalies.
Results
A SUA was present in 8.61% of the autopsies. The gestational age of the affected fetuses ranged between 13 to 40 weeks. An SUA presented as an isolated single anomaly in 44 cases (3.4%). Of the 110 SUA cases, 60% had other congenital anomalies. There was a significant association between birth defects and SUAs (p < .001). Strong associations between SUA and urinary tract, lung, and musculoskeletal anomalies were observed.
Conclusions
A SUA is usually seen in association with other congenital malformations rather than as an isolated defect. Therefore, examination for associated anomalies when an SUA is detected either antenatally or postnatally is imperative. The findings of this study should be helpful in counseling expectant mothers and their families in cases of SUA.

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Amulya Choudary Kotapati, Bhargavi Khandru, Vijayasree M.
Journal of Evolution of Medical and Dental Sciences.2025; : 10. CrossRef
Epidemiological and Histopathological Characteristics of Fetuses with Congenital Disorders: A Study in Greece
Despoina Nteli, Maria Nteli, Konstantinos Konstantinidis, Maria Ouzounidou, Paschalis Theotokis, Maria-Eleni Manthou, Iasonas Dermitzakis, Xeni Miliara, Chrysoula Gouta, Stamatia Angelidou, Dimosthenis Miliaras, Soultana Meditskou
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Review

Inflammatory bowel disease–associated intestinal fibrosis: Ji Min Park, Jeongseok Kim, Yoo Jin Lee, Sung Uk Bae, Hye Won Lee; J Pathol Transl Med. 2023;57(1):60-66. Published online January 10, 2023; DOI: https://doi.org/10.4132/jptm.2022.11.02

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Abstract PDF

Fibrosis is characterized by a proliferation of fibroblasts and excessive extracellular matrix following chronic inflammation, and this replacement of organ tissue with fibrotic tissue causes a loss of function. Inflammatory bowel disease (IBD) is a chronic inflammation of the gastrointestinal tract, and intestinal fibrosis is common in IBD patients, resulting in several complications that require surgery, such as a stricture or penetration. This review describes the pathogenesis and various factors involved in intestinal fibrosis in IBD, including cytokines, growth factors, epithelial-mesenchymal and endothelial-mesenchymal transitions, and gut microbiota. Furthermore, histopathologic findings and scoring systems used for stenosis in IBD are discussed, and differences in the fibrosis patterns of ulcerative colitis and Crohn’s disease are compared. Biomarkers and therapeutic agents targeting intestinal fibrosis are briefly mentioned at the end.

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Muriel Huss, Tanja Elger, Johanna Loibl, Arne Kandulski, Benedicta Binder, Petra Stoeckert, Patricia Mester, Martina Müller, Christa Buechler, Hauke Christian Tews
Gastroenterology Insights.2024; 15(2): 486. CrossRef
Inflammatory Bowel Disease: Immune Function, Tissue Fibrosis and Current Therapies
Jesús Cosín-Roger
International Journal of Molecular Sciences.2024; 25(12): 6416. CrossRef
The Diagnosis of Intestinal Fibrosis in Crohn’s Disease—Present and Future
Sara Jarmakiewicz-Czaja, Jolanta Gruszecka, Rafał Filip
International Journal of Molecular Sciences.2024; 25(13): 6935. CrossRef
Role of gut microbiota in Crohn’s disease pathogenesis: Insights from fecal microbiota transplantation in mouse model
Qiang Wu, Lian-Wen Yuan, Li-Chao Yang, Ya-Wei Zhang, Heng-Chang Yao, Liang-Xin Peng, Bao-Jia Yao, Zhi-Xian Jiang
World Journal of Gastroenterology.2024; 30(31): 3689. CrossRef
Ultrasound of the bowel with a focus on IBD: the new best practice
Christina Merrill, Stephanie R. Wilson
Abdominal Radiology.2024; 50(2): 555. CrossRef
Unveiling the anti-inflammatory potential of 11β,13-dihydrolactucin for application in inflammatory bowel disease management
Melanie S. Matos, María Ángeles Ávila-Gálvez, Antonio González-Sarrías, Nuno-Valério Silva, Carolina Lage Crespo, António Jacinto, Ana Teresa Serra, Ana A. Matias, Cláudia Nunes dos Santos
Food & Function.2024; 15(18): 9254. CrossRef
Gut microbiota and mesenteric adipose tissue interactions in shaping phenotypes and treatment strategies for Crohn’s disease
Anis Hasnaoui, Racem Trigui, Mario Giuffrida
World Journal of Gastroenterology.2024; 30(46): 4969. CrossRef
Pathways Affected by Falcarinol-Type Polyacetylenes and Implications for Their Anti-Inflammatory Function and Potential in Cancer Chemoprevention
Ruyuf Alfurayhi, Lei Huang, Kirsten Brandt
Foods.2023; 12(6): 1192. CrossRef
Time to eRAASe chronic inflammation: current advances and future perspectives on renin-angiotensin-aldosterone-system and chronic intestinal inflammation in dogs and humans
Romy M. Heilmann, Georg Csukovich, Iwan A. Burgener, Franziska Dengler
Frontiers in Veterinary Science.2023;[Epub] CrossRef
Role of the epithelial barrier in intestinal fibrosis associated with inflammatory bowel disease: relevance of the epithelial-to mesenchymal transition
Dulce C. Macias-Ceja, M. Teresa Mendoza-Ballesteros, María Ortega-Albiach, M. Dolores Barrachina, Dolores Ortiz-Masià
Frontiers in Cell and Developmental Biology.2023;[Epub] CrossRef

Original Articles

Pancreatic cancer in liquid-based cytology: cytological features and cell block utility from 254 fine-needle aspiration samples: Jaeyong Min, Wookjin Oh, Baek-hui Kim; J Pathol Transl Med. 2025;59(4):249-261. Published online July 3, 2025; DOI: https://doi.org/10.4132/jptm.2025.05.27

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Abstract PDF Supplementary Material: Background
Despite the increasing use of liquid-based cytology (LBC) for pancreatic cancer diagnosis, relatively few studies have directly examined such research. This study analyzed the cytopathological features of pancreatic cancer in LBC and demonstrated the utility of cell blocks in diagnosing pancreatic lesions. Methods: A retrospective review identified LBC from 254 pancreatic fine-needle aspirations (FNAs) (221 patients). FNAs were categorized into five subgroups based on cytopathological, clinical, and histopathological findings. Two pathologists evaluated cytological features in LBC samples, cell blocks, and tissue slides. Comparative analysis assessed differences between groups. Results: Compared to benign lesions, LBC of pancreatic cancer more frequently showed a necrotic background, intermediate to high cellularity, mixed architecture, nuclear/cytoplasmic ratio >0.8, anisonucleosis >4:1, irregular and thick nuclear membranes, multinucleated tumor cells, hyperchromatic nuclei, coarse to clumped chromatin, and a prominent single nucleolus. In cases of conventional pancreatic ductal adenocarcinoma, the palliative treatment subgroup showed a higher incidence of necrotic background than the resection subgroup. In the cell block analysis, tumor cells not identified in LBC slides were detected in 16 FNAs. Additionally, 13 FNAs contributed to differential diagnosis: ancillary tests aided diagnosis in 12 FNAs, while histopathological evaluation of the cell block slide alone was helpful in one case. Conclusions: The cytological features of pancreatic cancer in LBC are similar to those observed in conventional smears, with a necrotic background suggesting advanced (unresectable) disease. The cell block methodology minimizes tumor cell loss and facilitates differential diagnosis by enabling ancillary testing.

Categorizing high-grade serous ovarian carcinoma into clinically relevant subgroups using deep learning–based histomic clusters: Byungsoo Ahn, Eunhyang Park; J Pathol Transl Med. 2025;59(2):91-104. Published online February 18, 2025; DOI: https://doi.org/10.4132/jptm.2024.10.23

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Abstract PDF Supplementary Material

Background
High-grade serous ovarian carcinoma (HGSC) exhibits significant heterogeneity, posing challenges for effective clinical categorization. Understanding the histomorphological diversity within HGSC could lead to improved prognostic stratification and personalized treatment approaches. Methods: We applied the Histomic Atlases of Variation Of Cancers model to whole slide images from The Cancer Genome Atlas dataset for ovarian cancer. Histologically distinct tumor clones were grouped into common histomic clusters. Principal component analysis and K-means clustering classified HGSC samples into three groups: highly differentiated (HD), intermediately differentiated (ID), and lowly differentiated (LD). Results: HD tumors showed diverse patterns, lower densities, and stronger eosin staining. ID tumors had intermediate densities and balanced staining, while LD tumors were dense, patternless, and strongly hematoxylin-stained. RNA sequencing revealed distinct patterns in mitochondrial oxidative phosphorylation and energy metabolism, with upregulation in the HD, downregulation in the LD, and the ID positioned in between. Survival analysis showed significantly lower overall survival for the LD compared to the HD and ID, underscoring the critical role of mitochondrial dynamics and energy metabolism in HGSC progression. Conclusions: Deep learning-based histologic analysis effectively stratifies HGSC into clinically relevant prognostic groups, highlighting the role of mitochondrial dynamics and energy metabolism in disease progression. This method offers a novel approach to HGSC categorization.

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Learning Disabilities in the 21st Century: Integrating Neuroscience, Education, and Technology for Better Outcomes
Syed Mohammed Basheeruddin Asdaq, Ahmad H. Alhowail, Syed Imam Rabbani, Naira Nayeem, Syed Mohammed Emaduddin Asdaq, Faiqa Nausheen
SAGE Open.2025;[Epub] CrossRef

Newsletter

What’s new in adrenal gland pathology: WHO 5th edition for adrenal cortex: Carol N. Rizkalla, Maria Tretiakova; J Pathol Transl Med. 2024;58(4):201-204. Published online June 25, 2024; DOI: https://doi.org/10.4132/jptm.2024.06.07

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Abstract PDF

The 5th edition of WHO Classification of Endocrine and Neuroendocrine Tumors (2022) introduced many significant changes relevant to endocrine daily practice. In this newsletter, we summarize the notable changes to the adrenal cortex based on the 5th edition of the WHO classification [1].

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Ectopic adrenal gland in the liver leading to a misdiagnosis of hepatocellular carcinoma: A case report
Min-Qiu Qin, Yi-Peng Zhao, Ju-Ping Xie
World Journal of Hepatology.2025;[Epub] CrossRef

Review

Next step of molecular pathology: next-generation sequencing in cytology: Ricella Souza da Silva, Fernando Schmitt; J Pathol Transl Med. 2024;58(6):291-298. Published online November 7, 2024; DOI: https://doi.org/10.4132/jptm.2024.10.22

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Abstract PDF

The evolving landscape of precision oncology underscores the pivotal shift from morphological diagnosis to treatment decisions driven by molecular profiling. Recent guidelines from the European Society for Medical Oncology recomend the use of next-generation sequencing (NGS) across a broader range of cancers, reflecting its superior efficiency and clinical value. NGS not only updates oncology testing by offering quicker, sample-friendly, and sensitive analysis but also reduces the need for multiple individual tests. Cytology samples, often obtained through less invasive methods, can yield high-quality genetic material suitable for molecular analysis. This article focuses on optimizing the use of cytology samples in NGS, and outlines their potential benefits in identifying actionable molecular alterations for targeted therapies across various solid tumors. It also addresses the need for validation studies and the strategies to incorporate or combine different types of samples into routine clinical practice. Integrating cytological and liquid biopsies into routine clinical practice, alongside conventional tissue biopsies, offers a comprehensive approach to tumor genotyping, early disease detection, and monitoring of therapeutic responses across various solid tumor types. For comprehensive biomarker characterization, all patient specimens, although limited, is always valuable.

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The World Health Organization Reporting System for Lymph Node, Spleen, and Thymus Cytopathology: Part 1 – Lymph Node
Immacolata Cozzolino, Mats Ehinger, Maria Calaminici, Andrea Ronchi, Mousa A. Al-Abbadi, Helena Barroca, Beata Bode-Lesniewska, David F. Chhieng, Ruth L. Katz, Oscar Lin, L. Jeffrey Medeiros, Martha Bishop Pitman, Arvind Rajwanshi, Fernando C. Schmitt, Ph
Acta Cytologica.2025; : 1. CrossRef
The impact of cytological preparation techniques on RNA quality: A comparative study on smear samples
Cisel Aydin Mericoz, Gulsum Caylak, Elif Sevin Sanioglu, Zeynep Seçil Satilmis, Ayse Humeyra Dur Karasayar, Ibrahim Kulac
Cancer Cytopathology.2025;[Epub] CrossRef
Reimagining cytopathology in the molecular era: Integration or fragmentation?
Sumanta Das, R. Naveen Kumar, Biswajit Dey, Pranjal Kalita
Cytojournal.2025; 22: 94. CrossRef

Original Article

Diagnostic yield of fine needle aspiration with simultaneous core needle biopsy for thyroid nodules: Mohammad Ali Hasannia, Ramin Pourghorban, Hoda Asefi, Amir Aria, Elham Nazar, Hojat Ebrahiminik, Alireza Mohamadian; J Pathol Transl Med. 2025;59(3):180-187. Published online April 16, 2025; DOI: https://doi.org/10.4132/jptm.2025.03.04

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Abstract PDF: Background
Fine needle aspiration (FNA) is a widely utilized technique for assessing thyroid nodules; however, its inherent non-diagnostic rate poses diagnostic challenges. The present study aimed to evaluate and compare the diagnostic efficacy of FNA, core needle biopsy (CNB), and their combined application in the assessment of thyroid nodules.
Methods
A total of 56 nodules from 50 patients was analyzed using both FNA and simultaneous CNB. The ultrasound characteristics were categorized according to the American College of Radiology Thyroid Imaging Reporting and Data Systems classification system. The study compared the sensitivity, specificity, and accuracy of FNA, CNB, and the combination of the two techniques.
Results
The concordance between FNA and CNB was notably high, with a kappa coefficient of 0.837. The sensitivity for detecting thyroid malignancy was found to be 25.0% for FNA, 66.7% for CNB, and 83.3% for the combined FNA/CNB approach, with corresponding specificities of 84.6%, 97.4%, and 97.4%. The accuracy of the FNA/CNB combination was the highest at 94.1%.
Conclusions
The findings of this study indicate that both CNB and the FNA/CNB combination offer greater diagnostic accuracy for thyroid malignancy compared to FNA alone, with no significant complications reported. Integrating CNB with FNA findings may enhance management strategies and treatment outcomes for patients with thyroid nodules.

Review

Diagnosis of interstitial lung diseases: from Averill A. Liebow to artificial intelligence: Eunhee S. Yi, Paul Wawryko, Jay H. Ryu; J Pathol Transl Med. 2024;58(1):1-11. Published online January 10, 2024; DOI: https://doi.org/10.4132/jptm.2023.11.17

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Abstract PDF

Histopathologic criteria of usual interstitial pneumonia (UIP)/idiopathic pulmonary fibrosis (IPF) were defined over the years and endorsed by leading organizations decades after Dr. Averill A. Liebow first coined the term UIP in the 1960s as a distinct pathologic pattern of fibrotic interstitial lung disease. Novel technology and recent research on interstitial lung diseases with genetic component shed light on molecular pathogenesis of UIP/IPF. Two antifibrotic agents introduced in the mid-2010s opened a new era of therapeutic approaches to UIP/IPF, albeit contentious issues regarding their efficacy, side effects, and costs. Recently, the concept of progressive pulmonary fibrosis was introduced to acknowledge additional types of progressive fibrosing interstitial lung diseases with the clinical and pathologic phenotypes comparable to those of UIP/IPF. Likewise, some authors have proposed a paradigm shift by considering UIP as a stand-alone diagnostic entity to encompass other fibrosing interstitial lung diseases that manifest a relentless progression as in IPF. These trends signal a pendulum moving toward the tendency of lumping diagnoses, which poses a risk of obscuring potentially important information crucial to both clinical and research purposes. Recent advances in whole slide imaging for digital pathology and artificial intelligence technology could offer an unprecedented opportunity to enhance histopathologic evaluation of interstitial lung diseases. However, current clinical practice trends of moving away from surgical lung biopsies in interstitial lung disease patients may become a limiting factor in this endeavor as it would be difficult to build a large histopathologic database with correlative clinical data required for artificial intelligence models.

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Identification of early genes in the pathophysiology of fibrotic interstitial lung disease in a new model of pulmonary fibrosis
Nathan Hennion, Corentin Bedart, Léonie Vandomber, Frédéric Gottrand, Sarah Humez, Cécile Chenivesse, Jean-Luc Desseyn, Valérie Gouyer
Cellular and Molecular Life Sciences.2025;[Epub] CrossRef
Radiological Insights into UIP Pattern: A Comparison Between IPF and Non-IPF Patients
Stefano Palmucci, Miriam Adorna, Angelica Rapisarda, Alessandro Libra, Sefora Fischetti, Gianluca Sambataro, Letizia Antonella Mauro, Emanuele David, Pietro Valerio Foti, Claudia Mattina, Corrado Spatola, Carlo Vancheri, Antonio Basile
Journal of Clinical Medicine.2025; 14(12): 4162. CrossRef

Original Article

Low Ki-67 labeling index is a clinically useful predictive factor for recurrence-free survival in patients with papillary thyroid carcinoma: Takashi Masui, Katsunari Yane, Ichiro Ota, Kennichi Kakudo, Tomoko Wakasa, Satoru Koike, Hirotaka Kinugawa, Ryuji Yasumatsu, Tadashi Kitahara; J Pathol Transl Med. 2025;59(2):115-124. Published online February 18, 2025; DOI: https://doi.org/10.4132/jptm.2024.11.08

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Abstract PDF

Background
We report a new risk stratification of invasive stage papillary thyroid carcinomas (PTCs) by combining invasive status, using extrathyroid invasion (Ex) status, and tumor growth speed using the Ki-67 labeling index (LI). Methods: We examined tumor recurrence in 167 patients with PTC who were surgically treated at the Kindai University Nara Hospital between 2010 and 2022. The patients were classified according to the degree of invasion [negative (Ex0) or positive (Ex1, Ex2, and Ex3)] and tumor growth speed expressed with Ki-67 LI, as low (<5%) or high (>5%). This study confirmed previous findings that the disease-free survival (DFS) rate in PTCs significantly differed between patients with a high and low Ki-67 index. Results: When combining Ex status (negative or positive) and Ki-67 proliferation status (low or high), the DFS rate of invasion in the negative, low Ki-67 LI group was only 1.1%, while that of invasion in the positive, high Ki-67 LI was 44.1%. This study reports for the first time that recurrence risks can be stratified accurately when combining carcinoma’s essential two features of extrathyroid invasion status and tumor growth speed. Conclusions: We believe the evidence for low tumor recurrence risk may contribute to use of more conservative treatment options for invasive-stage PTCs and help alleviate patient anxiety about tumor recurrence and death.

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Research Progress on the Correlation between Three Biomarkers, Ki-67, CAIX and VEGF and Clear Cell Renal Cell Carcinoma
锦容马
Advances in Clinical Medicine.2025; 15(09): 326. CrossRef
Immunophenotypic Panel for Comprehensive Characterization of Aggressive Thyroid Carcinomas
Mihail Ceausu, Mihai Alin Publik, Dana Terzea, Carmen Adina Cristea, Dumitru Ioachim, Dana Manda, Sorina Schipor
Cells.2025; 14(19): 1554. CrossRef
High Ki-67 labeling index correlates with aggressive clinicopathological features in papillary thyroid carcinoma: a retrospective study
Defi Nurlia Erdian, Maria Francisca Ham, Dina Khoirunnisa, Agnes Stephanie Harahap
Thyroid Research.2025;[Epub] CrossRef

Newsletter

What’s new in bone and soft tissue pathology 2023: guidelines for molecular testing: Farres Obeidin; J Pathol Transl Med. 2023;57(3):184-187. Published online April 5, 2023; DOI: https://doi.org/10.4132/jptm.2023.03.20

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Abstract PDF

Our understanding of bone and soft tissue tumors has thoroughly evolved as a consequence of modern molecular techniques. DNA and RNA sequencing methods play an important diagnostic and therapeutic role in sarcoma pathology. Herein, we discuss current guidelines and best practices for molecular testing in bone and soft tissue tumors.

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RB1: governor of the cell cycle in health and disease—a primer for the practising pathologist
Fleur Cordier, David Creytens
Journal of Clinical Pathology.2024; 77(7): 435. CrossRef

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