Journal of Pathology and Translational Medicine

Original Article

Clinicopathological implications of immunohistochemical expression of TBX21, CXCR3, GATA3, CCR4, and TCF1 in nodal follicular helper T-cell lymphoma and peripheral T-cell lymphoma, not otherwise specified: Bogyeong Han, Sojung Lim, Jeemin Yim, Young Keun Song, Jiwon Koh, Sehui Kim, Cheol Lee, Young A Kim, Yoon Kyung Jeon; J Pathol Transl Med. 2024;58(2):59-71. Published online January 22, 2024; DOI: https://doi.org/10.4132/jptm.2024.01.04

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Abstract PDF Supplementary Material: Background
The classification of nodal peripheral T-cell lymphoma (PTCL) has evolved according to histology, cell-of-origin, and genetic alterations. However, the comprehensive expression pattern of follicular helper T-cell (Tfh) markers, T-cell factor-1 (TCF1), and Th1- and Th2-like molecules in nodal PTCL is unclear.
Methods
Eighty-two cases of nodal PTCL were classified into 53 angioimmunoblastic T-cell lymphomas (AITLs)/nodal T-follicular helper cell lymphoma (nTFHL)-AI, 18 PTCLs-Tfh/nTFHL–not otherwise specified (NOS), and 11 PTCLs-NOS according to the revised 4th/5th World Health Organization classifications. Immunohistochemistry for TCF1, TBX21, CXCR3, GATA3, and CCR4 was performed.
Results
TCF1 was highly expressed in up to 68% of patients with nTFHL but also in 44% of patients with PTCL-NOS (p > .05). CXCR3 expression was higher in AITLs than in non-AITLs (p = .035), whereas GATA3 expression was higher in non-AITL than in AITL (p = .007) and in PTCL-Tfh compared to AITL (p = .010). Of the cases, 70% of AITL, 44% of PTCLTfh/ nTFHL-NOS, and 36% of PTCL-NOS were subclassified as the TBX21 subtype; and 15% of AITL, 38% of PTCL-Tfh/nTFHL-NOS, and 36% of PTCL-NOS were subclassified as the GATA3 subtype. The others were an unclassified subtype. CCR4 expression was associated with poor progression-free survival (PFS) in patients with PTCL-Tfh (p < .001) and nTFHL (p = .023). The GATA3 subtype showed poor overall survival in PTCL-NOS compared to TBX21 (p = .046) and tended to be associated with poor PFS in patients with non-AITL (p = .054).
Conclusions
The TBX21 subtype was more prevalent than the GATA3 subtype in AITL. The GATA3 subtype was associated with poor prognosis in patients with non-AITL and PTCL-NOS.

Review

Lymphoproliferative disorder involving body fluid: diagnostic approaches and roles of ancillary studies: Jiwon Koh, Sun Ah Shin, Ji Ae Lee, Yoon Kyung Jeon; J Pathol Transl Med. 2022;56(4):173-186. Published online July 4, 2022; DOI: https://doi.org/10.4132/jptm.2022.05.16

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Lymphocyte-rich effusions represent benign reactive process or neoplastic condition. Involvement of lymphoproliferative disease in body cavity is not uncommon, and it often causes diagnostic challenge. In this review, we suggest a practical diagnostic approach toward lymphocyte-rich effusions, share representative cases, and discuss the utility of ancillary tests. Cytomorphologic features favoring neoplastic condition include high cellularity, cellular atypia/pleomorphism, monomorphic cell population, and frequent apoptosis, whereas lack of atypia, polymorphic cell population, and predominance of small T cells usually represent benign reactive process. Involvement of non-hematolymphoid malignant cells in body fluid should be ruled out first, followed by categorization of the samples into either small/medium-sized cell dominant or large-sized cell dominant fluid. Small/medium-sized cell dominant effusions require ancillary tests when either cellular atypia or history/clinical suspicion of lymphoproliferative disease is present. Large-sized cell dominant effusions usually suggest neoplastic condition, however, in the settings of initial presentation or low overall cellularity, ancillary studies are helpful for more clarification. Ancillary tests including immunocytochemistry, in situ hybridization, clonality test, and next-generation sequencing can be performed using cytologic preparations. Throughout the diagnostic process, proper review of clinical history, cytomorphologic examination, and application of adequate ancillary tests are key elements for successful diagnosis.

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The urgency of Burkitt lymphoma diagnosis in fluid cytology—A tertiary care experience
Soundarya Ravi, Anu K. Devi, Prabhu Manivannan, Debasis Gochhait, Rakhee Kar, Neelaiah Siddaraju
Cytopathology.2024; 35(2): 275. CrossRef
Immunocytochemistry on frozen-embedded cell block for the diagnosis of hematolymphoid cytology specimen: a straightforward alternative to the conventional cell block
Youjeong Seo, Sanzida Alam Prome, Lucia Kim, Jee Young Han, Joon Mee Kim, Suk Jin Choi
Journal of Hematopathology.2024; 17(1): 1. CrossRef
Lymphoma presenting as the first finding in pleural fluid cytology: A rare cytologic presentation
Kafil Akhtar, Gowthami Nagendhran, Anjum Ara, Masheera Akhtar
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Case Study

An unusual case of microsatellite instability–high/deficient mismatch repair (MSI-H/dMMR) diffuse large B-cell lymphoma revealed by targeted gene sequencing: Bogyeong Han, Sehui Kim, Jiwon Koh, Jeong Mo Bae, Hongseok Yun, Yoon Kyung Jeon; J Pathol Transl Med. 2022;56(2):92-96. Published online November 16, 2021; DOI: https://doi.org/10.4132/jptm.2021.10.15

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Abstract PDF

Microsatellite instability-high/deficient mismatch repair (MSI-H/dMMR) status has been approved as a tissue-agnostic biomarker for immune checkpoint inhibitor therapy in patients with solid tumors. We report the case of an MSI-H/dMMR diffuse large B-cell lymphoma (DLBCL) identified by targeted gene sequencing (TGS). A 90-year-old female who presented with vaginal bleeding and a large mass in the upper vagina was diagnosed with germinal center-B-cell-like DLBCL, which recurred at the uterine cervix at 9 months after chemotherapy. Based on TGS of 121 lymphoma-related genes and the LymphGen algorithm, the tumor was classified genetically as DLBCL of EZB subtype. Mutations in multiple genes, including frequent frameshift mutations, were detected by TGS and further suggested MSI. The MSI-H/dMMR and loss of MLH1 and PMS2 expression were determined in MSI-fragment analysis, MSI real-time polymerase chain reaction, and immunohistochemical tests. This case demonstrates the potential diagnostic and therapeutic utility of lymphoma panel sequencing for DLBCL with MSI-H/dMMR.

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Chimeric and mutant CARD9 constructs enable analyses of conserved and diverged autoinhibition mechanisms in the CARD‐CC protein family
Jens Staal, Yasmine Driege, Femke Van Gaever, Jill Steels, Rudi Beyaert
The FEBS Journal.2024; 291(6): 1220. CrossRef
PD-L1+diffuse large B-cell lymphoma with extremely high mutational burden and microsatellite instability due to acquiredPMS2mutation
Andrew W. Allbee, James Gerson, Guang Yang, Adam Bagg
Molecular Case Studies.2023; 9(4): a006318. CrossRef

Original Article

Clinicopathologic implication of PD-L1 gene alteration in primary adrenal diffuse large B cell lymphoma: Ki Rim Lee, Jiwon Koh, Yoon Kyung Jeon, Hyun Jung Kwon, Jeong-Ok Lee, Jin Ho Paik; J Pathol Transl Med. 2022;56(1):32-39. Published online November 16, 2021; DOI: https://doi.org/10.4132/jptm.2021.10.05

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Abstract PDF: Background
Primary adrenal (PA) diffuse large B cell lymphoma (DLBCL) was previously reported as an aggressive subset of DLBCL, but its genetic features were not sufficiently characterized. From our previous study of DLBCL with programmed death-ligand 1 (PD-L1) gene alterations, we focused on PD-L1 gene alterations in PA-DLBCL with clinicopathologic implications.
Methods
We performed fluorescence in situ hybridization for PD-L1 gene translocation and amplification in PA-DLBCL (n = 18) and comparatively analyzed clinicopathologic characteristics with systemic non-adrenal (NA)-DLBCL (n = 90).
Results
PA-DLBCL harbored distinctive features (vs. NADLBCL), including high international prognostic index score (3–5) (72% [13/18] vs. 38% [34/90], p = .007), poor Eastern Cooperative Oncology Group performance score (≥ 2) (47% [7/15] vs. 11% [10/90], p = .003), elevated serum lactate dehydrogenase (LDH) (78% [14/18] vs. 51% [44/87], p = .035) and MUM1 expression (87% [13/15] vs. 60% [54/90], p = .047). Moreover, PA-DLBCL showed frequent PD-L1 gene alterations (vs. NA-DLBCL) (39% [7/18] vs. 6% [5/86], p = .001), including translocation (22% [4/18] vs. 3% [3/87], p = .016) and amplification (17% [3/18] vs. 2% [2/87], p = .034). Within the PA-DLBCL group, PD-L1 gene–altered cases (vs. non-altered cases) tended to have B symptoms (p = .145) and elevated LDH (p = .119) but less frequent bulky disease (≥ 10 cm) (p = .119). In the survival analysis, PA-DLBCL had a poor prognosis for overall survival (OS) and progression-free survival (PFS) (vs. NA-DLBCL; p = .014 and p = .004). Within the PA-DLBCL group, PD-L1 translocation was associated with shorter OS and PFS (p < .001 and p = .012).
Conclusions
PA-DLBCL is a clinically aggressive and distinct subset of DLBCL with frequent PD-L1 gene alterations. PD-L1 gene translocation was associated with poor prognosis in PA-DLBCL.

Case Studies

A case of concomitant EGFR/ALK alteration against a mutated EGFR background in early-stage lung adenocarcinoma: Ki-Chang Lee, Jiwon Koh, Doo Hyun Chung, Yoon Kyung Jeon; J Pathol Transl Med. 2021;55(2):139-144. Published online January 22, 2021; DOI: https://doi.org/10.4132/jptm.2020.12.16

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Abstract PDF

Rare cases of lung adenocarcinoma (LUAD) with concomitant epidermal growth factor receptor (EGFR) mutation and anaplastic lymphoma kinase (ALK) translocation have been reported. However, their clonal and evolutional relationship remains unclear. We report a case of early-stage EGFR-mutated LUAD with a focal concomitant EGFR/ALK alteration. A 63-year-old male underwent lobectomy to remove a 1.9-cm-sized lung nodule, which was diagnosed with EGFR-mutated LUAD. ALK immunohistochemistry (IHC) showed focal positivity within the part of the tumor characterized by lepidic pattern, also confirmed by fluorescence in-situ hybridization (FISH). Targeted next-generation sequencing was performed separately on the ALK IHC/FISH-positive and -negative areas. EGFR L833V/L858R mutations were detected in both areas, whereas EML4 (echinoderm microtubule-associated protein-like 4)-ALK translocations was confirmed only in the ALK IHC/FISH-positive area, suggesting the divergence of an EGFR/ALK co-altered subclone from the original EGFR-mutant clone. Our study suggests that concurrent alterations of EGFR and ALK can arise via divergent tumor evolution, even in the relatively early phases of tumorigenesis.

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Identification and validation of molecular subtype and prognostic signature for lung adenocarcinoma based on neutrophil extracellular traps
Yanhua Zuo, Guangyi Leng, Ping Leng
Pathology and Oncology Research.2023;[Epub] CrossRef
Machine Learning-Based Integration Develops a Macrophage-Related Index for Predicting Prognosis and Immunotherapy Response in Lung Adenocarcinoma
Zuwei Li, Minzhang Guo, Wanli Lin, Peiyuan Huang
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Big data analysis identified a telomere-related signature predicting the prognosis and drug sensitivity in lung adenocarcinoma
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Morphologic variant of follicular lymphoma reminiscent of hyaline-vascular Castleman disease: Jiwon Koh, Yoon Kyung Jeon; J Pathol Transl Med. 2020;54(3):253-257. Published online February 5, 2020; DOI: https://doi.org/10.4132/jptm.2019.12.17

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Abstract PDF

Follicular lymphoma (FL) with hyaline-vascular Castleman disease (FL-HVCD)-like features is a rare morphologic variant, with fewer than 20 cases in the literature. Herein, we report a case of FL-HVCD in a 37-year-old female who presented with isolated neck lymph node enlargement. The excised lymph node showed features reminiscent of HVCD, including regressed germinal centers (GCs) surrounded by onion skin-like mantle zones, lollipop lesions composed of hyalinized blood vessels penetrating into regressed GCs, and hyalinized interfollicular stroma. In addition, focal areas of abnormally conglomerated GCs composed of homogeneous, small centrocytes with strong BCL2, CD10, and BCL6 expression were observed, indicating partial involvement of the FL. Several other lymphoid follicles showed features of in situ follicular neoplasia. Based on the observations, a diagnosis of FL-HVCD was made. Although FLHVCD is very rare, the possibility of this variant should be considered in cases resembling CD. Identification of abnormal, neoplastic follicles and ancillary immunostaining are helpful for proper diagnosis.

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Unicentric Castleman Disease: Illustration of Its Morphologic Spectrum and Review of the Differential Diagnosis
Siba El Hussein, Andrew G. Evans, Hong Fang, Wei Wang, L. Jeffrey Medeiros
Archives of Pathology & Laboratory Medicine.2024; 148(1): 99. CrossRef
Finding a needle in the haystack: A hidden follicular lymphoma
Hung-Yu Lin, Yi-Jen Peng, Yi-Ying Wu, Ping-Ying Chang
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Analysis of immunophenotypic features in hyaline vascular type Castleman disease
Yu Chang, Yu Ma, Chen Chang, Wensheng Li
Diagnostic Pathology.2023;[Epub] CrossRef
In‐situ follicular neoplasia: a clinicopathological spectrum
Gurdip S Tamber, Myriam Chévarie‐Davis, Margaret Warner, Chantal Séguin, Carole Caron, René P Michel
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Primary Peripheral Gamma Delta T-Cell Lymphoma of the Central Nervous System: Report of a Case Involving the Intramedullary Spinal Cord and Presenting with Myelopathy: Jeemin Yim, Seung Geun Song, Sehui Kim, Jae Won Choi, Kyu-Chong Lee, Jeong Mo Bae, Yoon Kyung Jeon; J Pathol Transl Med. 2019;53(1):57-61. Published online October 1, 2018; DOI: https://doi.org/10.4132/jptm.2018.08.21

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Abstract PDF

Primary central nervous system lymphoma of T-cell origin (T-PCNSL) is rare, and its clinicopathological features remain unclear. Peripheral T-cell lymphoma of γδ T-cell origin is an aggressive lymphoma mainly involving extranodal sites. Here, we report a case of γδ T-PCNSL involving the intramedullary spinal cord and presenting with paraplegia. A 75-year-old Korean woman visited the hospital complaining of back pain and lower extremity weakness. Magnetic resonance imaging revealed multifocal enhancing intramedullary nodular lesions in the thoracic and lumbar spinal cord. An enhancing nodular lesion was observed in the periventricular white matter of the lateral ventricle in the brain. There were no other abnormalities in systemic organs or skin. Laminectomy and tumor removal were performed. The tumor consisted of monomorphic, medium-to-large atypical lymphocytes with pale-to-eosinophilic cytoplasm. Immunohistochemically, the tumor cells were CD3(+), TCRβF1(-), TCRγ(+), CD30(-), CD4(-), CD8(-), CD56(+), TIA1(+), granzyme B(+), and CD103(+). Epstein-Barr virus in situ was negative. This case represents a unique T-PCNSL of γδ T-cell origin involving the spinal cord.

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B-Cell Lymphoma Intramedullary Tumor: Case Report and Systematic Review
Daniel Gregório Gonsalves, Paulo Eduardo Albuquerque Zito Raffa, Gabriela Gerenutti de Sousa, Melissa Esposito Gomes Rigueiral, Iracema Araújo Estevão, Cesar Cozar Pacheco, Roger Thomaz Rotta Medeiros, Paulo Roberto Franceschini, Paulo Henrique Pires de A
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Clinicopathologic and Genetic Features of Primary T-cell Lymphomas of the Central Nervous System
Jeemin Yim, Jiwon Koh, Sehui Kim, Seung Geun Song, Jeong Mo Bae, Hongseok Yun, Ji-Youn Sung, Tae Min Kim, Sung-Hye Park, Yoon Kyung Jeon
American Journal of Surgical Pathology.2022; 46(4): 486. CrossRef
Peripheral T-Cell Lymphomas Involving the Central Nervous System: A Report From the Czech Lymphoma Study Group Registry
Heidi Mocikova, Robert Pytlík, Katerina Benesova, Andrea Janikova, Juraj Duras, Alice Sykorova, Katerina Steinerova, Vit Prochazka, Vit Campr, David Belada, Marek Trneny
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Review

Molecular Testing of Lymphoproliferative Disorders: Current Status and Perspectives: Yoon Kyung Jeon, Sun Och Yoon, Jin Ho Paik, Young A Kim, Bong Kyung Shin, Hyun-Jung Kim, Hee Jeong Cha, Ji Eun Kim, Jooryung Huh, Young-Hyeh Ko; J Pathol Transl Med. 2017;51(3):224-241. Published online May 10, 2017; DOI: https://doi.org/10.4132/jptm.2017.04.09

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Abstract PDF

Molecular pathologic testing plays an important role for the diagnosis, prognostication and decision of treatment strategy in lymphoproliferative disease. Here, we briefly review the molecular tests currently used for lymphoproliferative disease and those which will be implicated in clinical practice in the near future. Specifically, this guideline addresses the clonality test for B- and T-cell proliferative lesions, molecular cytogenetic tests for malignant lymphoma, determination of cell-of-origin in diffuse large B-cell lymphoma, and molecular genetic alterations incorporated in the 2016 revision of the World Health Organization classification of lymphoid neoplasms. Finally, a new perspective on the next-generation sequencing for diagnostic, prognostic, and therapeutic purpose in malignant lymphoma will be summarized.

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Yu Pang, Daosheng Li, Yiqian Chen, Qinqin Liu, Yuheng Wu, Qingliang Teng, Yuyu Liu
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Development and implementation of an automated and highly accurate reporting process for NGS-based clonality testing
Sean T. Glenn, Phillip M. Galbo, Jesse D. Luce, Kiersten Marie Miles, Prashant K. Singh, Manuel J. Glynias, Carl Morrison
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Juan-Juan Zhang, Yu-Xin Xie, Li-Lin Luo, Xuan-Tao Yang, Yi-Xing Wang, Yue Cao, Zheng-Bo Long, Wan-Pu Wang
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Lymphoproliferative disorder involving body fluid: diagnostic approaches and roles of ancillary studies
Jiwon Koh, Sun Ah Shin, Ji Ae Lee, Yoon Kyung Jeon
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Original Article

Characteristics of Cutaneous Lymphomas in Korea According to the New WHO-EORTC Classification: Report of a Nationwide Study: Jae Ho Han, Young-Hyeh Ko, Yun Kyung Kang, Wan-Seop Kim, Yoon Jung Kim, Insun Kim, Hyun-Jung Kim, Soo Kee Min, Chan-Kum Park, Chan-Sik Park, Bong-Kyung Shin, Woo Ick Yang, Young-Ha Oh, Jong Sil Lee, Juhie Lee, Tae Hui Lee, Hyekyung Lee, Ho Jung Lee, Yoon Kyung Jeon, Hee Jeong Cha, Yoo-Duk Choi, Chul Woo Kim; Korean J Pathol. 2014;48(2):126-132. Published online April 28, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.2.126

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Abstract PDF

Background

Previously, cutaneous lymphomas were classified according to either the European Organization for the Research and Treatment of Cancer (EORTC) or the World Health Organization (WHO) classification paradigms. The aim of this study was to determine the relative frequency of Korean cutaneous lymphoma according to the new WHO-EORTC classification system.

Methods

A total of 517 patients were recruited during a recent 5 year-period (2006-2010) from 21 institutes and classified according to the WHO-EORTC criteria.

Results

The patients included 298 males and 219 females, and the mean age at diagnosis was 49 years. The lesions preferentially affected the trunk area (40.2%). The most frequent subtypes in order of decreasing prevalence were mycosis fungoides (22.2%), peripheral T-cell lymphoma (17.2%), CD30+ T-cell lymphoproliferative disorder (13.7%), and extranodal natural killer/T (NK/T) cell lymphoma, nasal type (12.0%). Diffuse large B-cell lymphoma accounted for 11.2% of cases, half of which were secondary cutaneous involvement; other types of B-cell lymphoma accounted for less than 1% of cases.

Conclusions

In comparison with data from Western countries, this study revealed relatively lower rates of mycosis fungoides and B-cell lymphoma in Korean patients, as well as higher rates of subcutaneous panniculitis-like T-cell lymphoma and NK/T cell lymphoma.

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Brief Case Report

Benign Indolent CD56-Positive NK-Cell Lymphoproliferative Lesion Involving Gastrointestinal Tract in an Adolescent: Jaemoon Koh, Heounjeong Go, Won Ae Lee, Yoon Kyung Jeon; Korean J Pathol. 2014;48(1):73-76. Published online February 25, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.1.73

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Xin-Gen Wang, Wei-Hua Yin, Huan-You Wang
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Craig R. Soderquist, Govind Bhagat
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Makoto Nakajima, Masayuki Shimoda, Kengo Takeuchi, Akito Dobashi, Takanori Kanai, Yae Kanai, Yasushi Iwao
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Case Reports

Extranodal NK/T Cell Lymphoma Accompanied by Heavy Eosinophilic Infiltration and Peripheral Blood Eosinophilia, Involving Skeletal Muscles.: Jin Ho Paik, Yoon Kyung Jeon, Heounjeong Go, Chul Woo Kim; Korean J Pathol. 2011;45:S70-S74.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.S1.S70

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The patient was a 52-year-old female with swelling in both lower legs and peripheral blood eosinophilia. Biopsy specimen revealed the heavy infiltration of eosinophils with sparse small lymphocytes showing mild atypia. The diagnosis was Kimura disease. The symptoms including eosinophilia were relieved by steroid treatment. At 17 months from initial biopsy, the patient developed swelling of the buttock. At 25 months, fever and dyspnea with multiple lung nodules developed. Wedge resection revealed multiple aggregates of CD3(+), CD56(+), Epstein-Barr virus(+) large atypical lymphocytes with necrosis. The patient was finally diagnosed with extranodal NK/T cell lymphoma (NKTL). Epstein-Barr virus in situ hybridization retrospectively performed on the previous biopsies demonstrated Epstein-Barr virus infection in small CD3(+) lymphocytes. The patient expired after 26 months despite chemotherapy. Blood eosinophilia correlated well with disease activity during the clinical course. This case shows not only unusual histologic features, which hampered the correct diagnosis, but also a unique clinical manifestation of NKTL.

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Muscular involvement of extranodal natural killer/T cell lymphoma misdiagnosed as polymyositis: A case report and review of literature
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Extranodal natural killer/T-cell lymphoma with paraneoplastic eosinophilic myositis
Jayati Mallick, Jasmine Zain, Dennis D. Weisenburger
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Extranodal NK/T-cell Lymphoma Mimicking Granulomatous Myositis
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Uveitis and Myositis as Immune Complications in Chemorefractory NK/T-Cell Nasal-Type Lymphoma Successfully Treated with Allogeneic Stem-Cell Transplant
Maria José Gómez-Crespo, Aránzazu García-Raso, Jose Luis López-Lorenzo, Teresa Villaescusa, María Rodríguez-Pinilla, José Fortes, Cristina Serrano, Salma Machan, Pilar Llamas, Raúl Córdoba
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Cytologic Features and BRAF Mutation of Hyalinizing Trabecular Adenoma of the Thyroid: A Case Report with Review of the Literature.: Se Min Jang, Young Ha Oh, Yoon Kyung Jeon, Yong Wook Park, Moon Hyang Park; Korean J Pathol. 2011;45(4):428-433.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.4.428

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A hyalinizing trabecular adenoma (HTA) is a rare benign thyroid tumor of follicular epithelial cell origin with a trabecular-alveolar growth pattern and marked intratrabecular hyalinization. The cytological and histological features of HTA are very similar to those of papillary and medullary carcinomas of the thyroid. Therefore, an accurate diagnosis of HTA is important to avoid unnecessary and potentially harmful management of patients. However, the results of BRAF gene mutation analysis shown by many studies are distinctly different between HTAs and papillary thyroid carcinomas. Herein, we describe a rare case of HTA of the thyroid in a 49-year-old female and consider its characteristic cytological features and BRAF gene mutation analysis results with a brief review of the literature.

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Hyalinizing trabecular tumor, a rare histologically unique tumor of the thyroid, coexisting with papillary thyroid carcinoma
Chiu-Hsuan Cheng
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Original Articles

WHO Classification of Malignant Lymphomas in Korea: Report of the Third Nationwide Study.: Jin Man Kim, Young Hyeh Ko, Seung Sook Lee, Jooryung Huh, Chang Suk Kang, Chul Woo Kim, Yun Kyung Kang, Jai Hyang Go, Min Kyung Kim, Wan Seop Kim, Yoon Jung Kim, Hyun Jung Kim, Hee Kyung Kim, Jong Hee Nam, Hyung Bae Moon, Chan Kum Park, Tae In Park, Young Ha Oh, Dong Wha Lee, Jong Sil Lee, Juhie Lee, Hyekyung Lee, Sung Chul Lim, Kyu Yun Jang, Hee Kyung Chang, Yoon Kyung Jeon, Hye Ra Jung, Min Sun Cho, Hee Jeong Cha, Suk Jin Choi, Jae Ho Han, Sook Hee Hong, Insun Kim; Korean J Pathol. 2011;45(3):254-260.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.3.254

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BACKGROUND
The aim of study was to determine the relative frequency of malignant lymphoma according to World Health Organization (WHO) classification in Korea.
METHODS
A total of 3,998 cases diagnosed at 31 institutes between 2005 and 2006 were enrolled. Information including age, gender, pathologic diagnosis, site of involvement and immunophenotypes were obtained.
RESULTS
The relative frequency of non-Hodgkin lymphoma (NHL) and Hodgkin lymphoma (HL) was 95.4% and 4.6%, respectively. B-cell lymphomas accounted for 77.6% of all NHL, while T/natural killer (T/NK)-cell lymphomas accounted for 22.4%. The most frequent subtypes of NHL were diffuse large B-cell lymphoma (42.7%), extranodal marginal zone B-cell lymphoma (MZBCL) of mucosa-associated lymphoid tissue (19.0%), NK/T-cell lymphoma (6.3%) and peripheral T-cell lymphoma (PTCL), unspecified (6.3%), in decreasing order. The relative frequency of HL was nodular sclerosis (47.4%), mixed cellularity (30.6%), and nodular lymphocyte predominant (12.1%) subtypes. Compared with a previous study in 1998, increase in gastric MZBCL and nodular sclerosis HL, and slight decrease of follicular lymphoma, PTCL, and NK/T-cell lymphoma were observed.
CONCLUSIONS
Korea had lower rates of HL and follicular lymphoma, and higher rates of extranodal NHL, extranodal MZBCL, and NK/T-cell lymphoma of nasal type compared with Western countries. Changes in the relative frequency of lymphoma subtypes are likely ascribed to refined diagnostic criteria and a change in national health care policy.

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Korean Pediatric/Adolescent Lymphoma: Incidence and Pathologic Characteristics.: Seung Sook Lee, Jin Man Kim, Young Hyeh Ko, Jooryung Huh, Chang Suk Kang, Chul Woo Kim, Yun Kyung Kang, Jai Hyang Go, Min Kyung Kim, Wan Seop Kim, Yoon Jung Kim, Hyun Jung Kim, Hee Kyung Kim, Jong Hee Nam, Hyung Bae Moon, Chan Kum Park, Tae In Park, Young Ha Oh, Dong Wha Lee, Jong Sil Lee, Juhie Lee, Hyekyung Lee, Sung Chul Lim, Kyu Yun Jang, Hee Kyung Chang, Yoon Kyung Jeon, Hye Ra Jung, Min Sun Cho, Hee Jeong Cha, Suk Jin Choi, Jae Ho Han, Sook Hee Hong, Insun Kim; Korean J Pathol. 2010;44(2):117-124.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.2.117

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Abstract PDF

BACKGROUND
The Hematopathology Study Group of the Korean Society of Pathologists conducted a nation-wide retrospective analysis of Korean pediatric lymphoma, to provide pathologic data on pediatric/adolescent lymphoma subtypes and features.
METHODS
All lymphoma cases of all age groups were collected during a recent 2 year-period (2005-2006) from 32 institutes in Korea. Among 3,686 lymphoma patients, 142 who were age 18 or less were classified according to the World Health Organization (WHO) classification.
RESULTS
Among 142 pediatric/adolescent lymphoma patients, Hodgkin lymphoma accounted for 21 (14.8%) and non-Hodgkin lymphoma (NHL) for 121 (85.2%). Hodgkin lymphoma appears to be more common in the pediatric/adolescent age group than in the all-ages group (14.8% vs 4.4%). T- and natural killer cell-NHL was more common in the pediatric/adolescent age group than in the all ages group (46.3% vs 22%). The majority of Korean pediatric/adolescent NHL cases was composed of Burkitt lymphoma, T- or B-lymphoblastic lymphoma, anaplastic large-cell lymphoma, and diffuse large B-cell lymphoma. For lymphoma patients under the age of 6 years, most had B-lymphoblastic or Burkitt lymphoma, which commonly presented at extranodal sites.
CONCLUSIONS
The distribution of lymphoma subtypes in the pediatric/adolescent age group is quite different from the distribution of adults, but it was quite similar to distribution in Western countries.

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A Case of Nasal Type Extranodal NK/T Cell Lymphoma Incidentally Detected in a Child
Ha Jin Oh, Sang Hyun Park, Hae In Jang, Dong Hoon Lee, Yoo Duk Choi, Hee Jo Baek, Hoon Kook
Clinical Pediatric Hematology-Oncology.2015; 22(1): 76. CrossRef

Detection of SV40 Large T Antigen in Malignant Lymphomas.: Young A Kim, MeeSoo Chang, Jinho Paik, Sun Och Yoon, Yoon Kyung Jeon, Chul Woo Kim, Ji Eun Kim; Korean J Pathol. 2009;43(4):312-316.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.4.312

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Abstract PDF

BACKGROUND
The association of simian virus 40 (SV40) with certain types of human cancers, including malignant lymphomas, has been a topic of interest for some time. Although the virus is distributed worldwide, its incidences vary according to the specific types of tumors, and the epidemiological areas. The aim of this study was to investigate the frequency of SV40 in malignant lymphomas among Korean patients. METHODS: One hundred seventy three cases of malignant lymphomas were evaluated by immunohistochemical staining for SV40 large T antigen (TAg), using an extremely sensitive, tyramide based, catalyzed signal amplification method. RESULTS: From 158 non-Hodgkin's lymphomas, including 115 diffuse large B-cell lymphomas, and 15 Hodgkin's lymphomas, none of the cases were positive for SV40 TAg. CONCLUSIONS: SV40 does not appear to be related to the pathogenesis of malignant lymphomas among Koreans.

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No Detection of Simian Virus 40 in Malignant Mesothelioma in Korea
Minseob Eom, Jamshid Abdul-Ghafar, Sun-Mi Park, Joung Ho Han, Soon Won Hong, Kun Young Kwon, Eun Suk Ko, Lucia Kim, Wan Seop Kim, Seung Yeon Ha, Kyo Young Lee, Chang Hun Lee, Hye Kyoung Yoon, Yoo Duk Choi, Myoung Ja Chung, Soon-Hee Jung
Korean Journal of Pathology.2013; 47(2): 124. CrossRef

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