Journal of Pathology and Translational Medicine

Original Articles

Development of quality assurance program for digital pathology by the Korean Society of Pathologists: Yosep Chong, Jeong Mo Bae, Dong Wook Kang, Gwangil Kim, Hye Seung Han; J Pathol Transl Med. 2022;56(6):370-382. Published online November 15, 2022; DOI: https://doi.org/10.4132/jptm.2022.09.30

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Background
Digital pathology (DP) using whole slide imaging is a recently emerging game changer technology that can fundamentally change the way of working in pathology. The Digital Pathology Study Group (DPSG) of the Korean Society of Pathologists (KSP) published a consensus report on the recommendations for pathologic practice using DP. Accordingly, the need for the development and implementation of a quality assurance program (QAP) for DP has been raised.
Methods
To provide a standard baseline reference for internal and external QAP for DP, the members of the Committee of Quality Assurance of the KSP developed a checklist for the Redbook and a QAP trial for DP based on the prior DPSG consensus report. Four leading institutes participated in the QAP trial in the first year, and we gathered feedback from these institutes afterwards.
Results
The newly developed checklists of QAP for DP contain 39 items (216 score): eight items for quality control of DP systems; three for DP personnel; nine for hardware and software requirements for DP systems; 15 for validation, operation, and management of DP systems; and four for data security and personal information protection. Most participants in the QAP trial replied that continuous education on unfamiliar terminology and more practical experience is demanding.
Conclusions
The QAP for DP is essential for the safe implementation of DP in pathologic practice. Each laboratory should prepare an institutional QAP according to this checklist, and consecutive revision of the checklist with feedback from the QAP trial for DP needs to follow.

Citations

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Diagnostic proficiency test using digital cytopathology and comparative assessment of whole slide images of cytologic samples for quality assurance program in Korea
Yosep Chong, Soon Auck Hong, Hoon Kyu Oh, Soo Jin Jung, Bo-Sung Kim, Ji Yun Jeong, Ho-Chang Lee, Gyungyub Gong
Journal of Pathology and Translational Medicine.2023; 57(5): 251. CrossRef

Fatty acid synthetase expression in triple-negative breast cancer: Jin Hee Park, Hye Seung Han, So Dug Lim, Wook Youn Kim, Kyoung Sik Park, Young Bum Yoo, Seung Eun Lee, Wan-Seop Kim; J Pathol Transl Med. 2022;56(2):73-80. Published online January 21, 2022; DOI: https://doi.org/10.4132/jptm.2021.10.27

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Abstract PDF

Background
Triple-negative breast cancer (TNBC) has a relatively poor prognosis. Research has identified potential metabolic targets, including fatty acid metabolism, in TNBC. The absence of effective target therapies for TNBC led to exploration of the role of fatty acid synthetase (FASN) as a potential target for TNBC therapy. Here, we analyzed the expression of FASN, a representative lipid metabolism–related protein, and investigated the association between FASN expression and Ki-67 and the programmed death ligand 1 (PD-L1) biomarkers in TNBC.
Methods
Immunohistochemical expression of FASN was analyzed in 166 patients with TNBC. For analytical purposes, patients with 0–1+ FASN staining were grouped as low-grade FASN and patients with 2–3+ FASN staining as high-grade FASN.
Results
FASN expression was observed in 47.1% of TNBC patients. Low and high expression of FASN was identified in 75.9% and 24.1%, respectively, and no statistically significant difference was found in T category, N category, American Joint Committee on Cancer stage, or recurrence rate between the low and high-FASN expression groups. Ki-67 proliferation level was significantly different between the low and high-FASN expression groups. FASN expression was significantly related to Ki-67 as the level increased. There was no significant difference in PD-L1 positivity between the low- and high-FASN expression groups.
Conclusions
We identified FASN expression in 166 TNBC patients. The Ki-67 proliferation index was positively correlated with FASN level, indicating higher proliferation activity as FASN increases. However, there was no statistical association with PD-L1 SP142, the currently FDA-approved assay, or FASN expression level.

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Reviews

Standardization of the pathologic diagnosis of appendiceal mucinous neoplasms: Dong-Wook Kang, Baek-hui Kim, Joon Mee Kim, Jihun Kim, Hee Jin Chang, Mee Soo Chang, Jin-Hee Sohn, Mee-Yon Cho, So-Young Jin, Hee Kyung Chang, Hye Seung Han, Jung Yeon Kim, Hee Sung Kim, Do Youn Park, Ha Young Park, So Jeong Lee, Wonae Lee, Hye Seung Lee, Yoo Na Kang, Younghee Choi; J Pathol Transl Med. 2021;55(4):247-264. Published online July 8, 2021; DOI: https://doi.org/10.4132/jptm.2021.05.28

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Abstract PDF Supplementary Material

Although the understanding of appendiceal mucinous neoplasms (AMNs) and their relationship with disseminated peritoneal mucinous disease have advanced, the diagnosis, classification, and treatment of AMNs are still confusing for pathologists and clinicians. The Gastrointestinal Pathology Study Group of the Korean Society of Pathologists (GPSG-KSP) proposed a multicenter study and held a workshop for the “Standardization of the Pathologic Diagnosis of the Appendiceal Mucinous Neoplasm” to overcome the controversy and potential conflicts. The present article is focused on the diagnostic criteria, terminologies, tumor grading, pathologic staging, biologic behavior, treatment, and prognosis of AMNs and disseminated peritoneal mucinous disease. In addition, GPSG-KSP proposes a checklist of standard data elements of appendiceal epithelial neoplasms to standardize pathologic diagnosis. We hope the present article will provide pathologists with updated knowledge on how to handle and diagnose AMNs and disseminated peritoneal mucinous disease.

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Standardized Pathology Report for Colorectal Cancer, 2nd Edition: Baek-hui Kim, Joon Mee Kim, Gyeong Hoon Kang, Hee Jin Chang, Dong Wook Kang, Jung Ho Kim, Jeong Mo Bae, An Na Seo, Ho Sung Park, Yun Kyung Kang, Kyung-Hwa Lee, Mee Yon Cho, In-Gu Do, Hye Seung Lee, Hee Kyung Chang, Do Youn Park, Hyo Jeong Kang, Jin Hee Sohn, Mee Soo Chang, Eun Sun Jung, So-Young Jin, Eunsil Yu, Hye Seung Han, Youn Wha Kim; J Pathol Transl Med. 2020;54(1):1-19. Published online November 13, 2019; DOI: https://doi.org/10.4132/jptm.2019.09.28

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Abstract PDF Supplementary Material

The first edition of the ‘Standardized Pathology Report for Colorectal Cancer,’ which was developed by the Gastrointestinal Pathology Study Group (GIP) of the Korean Society of Pathologists, was published 13 years ago. Meanwhile, there have been many changes in the pathologic diagnosis of colorectal cancer (CRC), pathologic findings included in the pathology report, and immunohistochemical and molecular pathology required for the diagnosis and treatment of colorectal cancer. In order to reflect these changes, we (GIP) decided to make the second edition of the report. The purpose of this standardized pathology report is to provide a practical protocol for Korean pathologists, which could help diagnose and treat CRC patients. This report consists of “standard data elements” and “conditional data elements.” Basic pathologic findings and parts necessary for prognostication of CRC patients are classified as “standard data elements,” while other prognostic factors and factors related to adjuvant therapy are classified as “conditional data elements” so that each institution could select the contents according to the characteristics of the institution. The Korean version is also provided separately so that Korean pathologists can easily understand and use this report. We hope that this report will be helpful in the daily practice of CRC diagnosis.

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Molecular Testing for Gastrointestinal Cancer: Hye Seung Lee, Woo Ho Kim, Yoonjin Kwak, Jiwon Koh, Jeong Mo Bae, Kyoung-Mee Kim, Mee Soo Chang, Hye Seung Han, Joon Mee Kim, Hwal Woong Kim, Hee Kyung Chang, Young Hee Choi, Ji Y. Park, Mi Jin Gu, Min Jin Lhee, Jung Yeon Kim, Hee Sung Kim, Mee-Yon Cho; J Pathol Transl Med. 2017;51(2):103-121. Published online February 19, 2017; DOI: https://doi.org/10.4132/jptm.2017.01.24

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Abstract PDF

With recent advances in molecular diagnostic methods and targeted cancer therapies, several molecular tests have been recommended for gastric cancer (GC) and colorectal cancer (CRC). Microsatellite instability analysis of gastrointestinal cancers is performed to screen for Lynch syndrome, predict favorable prognosis, and screen patients for immunotherapy. The epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor has been approved in metastatic CRCs with wildtype RAS (KRAS and NRAS exon 2–4). A BRAF mutation is required for predicting poor prognosis. Additionally, amplification of human epidermal growth factor receptor 2 (HER2) and MET is also associated with resistance to EGFR inhibitor in metastatic CRC patients. The BRAF V600E mutation is found in sporadic microsatellite unstable CRCs, and thus is helpful for ruling out Lynch syndrome. In addition, the KRAS mutation is a prognostic biomarker and the PIK3CA mutation is a molecular biomarker predicting response to phosphoinositide 3-kinase/AKT/mammalian target of rapamycin inhibitors and response to aspirin therapy in CRC patients. Additionally, HER2 testing should be performed in all recurrent or metastatic GCs. If the results of HER2 immunohistochemistry are equivocal, HER2 silver or fluorescence in situ hybridization testing are essential for confirmative determination of HER2 status. Epstein-Barr virus–positive GCs have distinct characteristics, including heavy lymphoid stroma, hypermethylation phenotype, and high expression of immune modulators. Recent advances in next-generation sequencing technologies enable us to examine various genetic alterations using a single test. Pathologists play a crucial role in ensuring reliable molecular testing and they should also take an integral role between molecular laboratories and clinicians.

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Original Article

Comparison of Analytical and Clinical Performance of HPV 9G DNA Chip, PANArray HPV Genotyping Chip, and Hybrid-Capture II Assay in Cervicovaginal Swabs: Ho Young Jung, Hye Seung Han, Hyo Bin Kim, Seo Young Oh, Sun-Joo Lee, Wook Youn Kim; J Pathol Transl Med. 2016;50(2):138-146. Published online January 13, 2016; DOI: https://doi.org/10.4132/jptm.2015.10.21

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Abstract PDF

Background
Human papillomavirus (HPV) infection can be detected by using several molecular methods, including Hybrid-Capture II (HC2) assay and variable HPV DNA chip tests, although each method has different sensitivities and specificities. Methods: We performed HPV 9G DNA Chip (9G) and PANArray HPV Genotyping Chip (PANArray) tests on 118 cervicovaginal swabs and compared the results with HC2, cytology, histology, and direct sequencing results. Results: The overall and high-risk HPV (HR-HPV) positivity rates were 62.7% and 44.9% using 9G, and 61.0% and 30.5% using PANArray, respectively. The positivity rates for HR-HPV with these two chips were significantly lower than 55.1% when HC2 was used. The sensitivity of overall HPV positivity in detecting histologically confirmed low-grade cervical squamous intraepithelial lesions or higher was 88.7% for all three tests. The specificity was 58.5% for 9G and 61.5% for PANArray, which was significantly lower than the 72.3% for HC2. With the HR-HPV⁺ genotype threshold, the sensitivity decreased to 75.5% for 9G and 52.8% for PANArray, which was significantly lower than the 88.7% for HC2. Comparison of the two chips showed concordant results in 55.1% of the samples, compatible results in 16.9%, and discordant results in 28.0%, exhibiting poor agreement in detecting certain HPV genotypes. Compared with direct sequencing, 9G yielded no discordant results, whereas PANArray yielded 31 discordant results (26.7%). Conclusions: Compared with HC2, the HPV genotyping tests showed lower sensitivity in histologic correlation. When the two chips were compared, the 9G was more sensitive and accurate for detecting HR-HPV than the PANArray.

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Concordance of Anyplex™ II HPV HR assays with reference HPV assays in cervical cancer screening: Systematic review
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The clinical performance of human papillomavirus genotyping using PANArray HPV chip: Comparison to ThinPrep cytology alone and co-testing
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Correspondence

Erratum: Correction of Acknowledgments. ERG Immunohistochemistry as an Endothelial Marker for Assessing Lymphovascular Invasion: Sehun Kim, Hyung Kyu Park, Ho Young Jung, So-Young Lee, Kyueng-Whan Min, Wook Youn Kim, Hye Seung Han, Wan Seop Kim, Tae Sook Hwang, So Dug Lim; Korean J Pathol. 2013;47(5):503-503. Published online October 25, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.5.503

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PDF

Brief Case Report

Neuroendocrine Dysplasia Combined in a Tubular Adenoma of Rectum: A Case Report: So-Young Lee, Dae-Yong Hwang, Tae Sook Hwang, Wan-Seop Kim, So Dug Lim, Wook Youn Kim, Se-Hun Kim, Hye Seung Han; Korean J Pathol. 2013;47(5):495-498. Published online October 25, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.5.495

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PDF

Citations

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Neuroendocrine cell micronests of the colon
Richard R. Pacheco, Maria Faraz, Hwajeong Lee
Human Pathology Reports.2022; 28: 300644. CrossRef
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Parag D Dabir, Rachel S van der Post, Iris D Nagtegaal
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Large cell neuroendocrine tumor of the gastrointestinal tract with concurrent tubular adenomas
Inayat GILL, Christienne SHAMS, Elisa QUIROZ, Subhashree M. KRISHNAN, Susanna GAIKAZIAN
Gazzetta Medica Italiana Archivio per le Scienze Mediche.2021;[Epub] CrossRef
Neuroendocrine tumor mixed with adenoma in rectum: a case report and literature review
Jiancong Hu, Xiaochuan Chen, Dezheng Lin, Zhaoliang Yu, Juan Li, Xuefeng Guo
International Journal of Surgery Oncology.2019; 4(6): e79. CrossRef

Case Study

Rhabdoid Colorectal Carcinomas: Reports of Two Cases: Sang Hwa Lee, Hyesil Seol, Wook Youn Kim, So Dug Lim, Wan Seop Kim, Tae Sook Hwang, Hye Seung Han; Korean J Pathol. 2013;47(4):372-377. Published online August 26, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.4.372

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Abstract PDF

Rhabdoid colorectal carcinomas are very rare and only 10 cases have been previously reported. We report two cases of rhabdoid colorectal carcinoma, one arising in the sigmoid colon of a 62-year-old man and another in the rectum of an 83-year-old woman. In both cases, the patients had advanced tumors with lymph node metastases. The tumors mostly showed a diffuse arrangement with rhabdoid features and small glandular regions were combined. Transitional areas from the adenocarcinomas to the rhabdoid tumors were also noted. Adenocarcinoma cells were positive for mixed cytokeratin (CK), CK20 and epithelial membranous antigen (EMA), but focal positive for vimentin. The rhabdoid tumor cells were positive for mixed CK, but focal positive or negative for CK20 and EMA. In addition, they were diffusely positive for vimentin, but negative for desmin. The histological and immunohistologial findings of these two cases suggest that the rhabodid tumor cells originated from dedifferentiated adenocarcinomas.

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Malignant Rhabdoid Tumor of the Colon: A Case Report
Elena Romera Barba, Ainhoa Sánchez Pérez, Carlos Duque Pérez, José Antonio García Marcilla, José Luis Vázquez Rojas
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Tumor rabdoide maligno de colon: a propósito de un caso☆
Elena Romera Barba, Ainhoa Sánchez Pérez, Carlos Duque Pérez, José Antonio García Marcilla, José Luis Vázquez Rojas
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Original Article

ERG Immunohistochemistry as an Endothelial Marker for Assessing Lymphovascular Invasion: Sehun Kim, Hyung Kyu Park, Ho Young Jung, So-Young Lee, Kyueng-Whan Min, Wook Youn Kim, Hye Seung Han, Wan Seop Kim, Tae Sook Hwang, So Dug Lim; Korean J Pathol. 2013;47(4):355-364. Published online August 26, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.4.355

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Abstract PDF

Background

ERG, a member of the ETS family of transcription factors, is a highly specific endothelial marker. We investigated whether the use of ERG immunostaining can help pathologists detect lymphovascular invasion (LVI) and decrease interobserver variability in LVI diagnosis.

Methods

Fifteen cases of surgically resected colorectal cancers with hepatic metastasis were selected and the most representative sections for LVI detection were immunostained with ERG, CD31, and D2-40. Eight pathologists independently evaluated LVI status on hematoxylin and eosin (H&E) and the corresponding immunostained sections and then convened for a consensus meeting. The results were analyzed by kappa (κ) statistics.

Results

The average rate of LVI positivity was observed in 43% with H&E only, 10% with CD31, 29% with D2-40, and 16% with ERG. Agreement among pathologists was fair for H&E only (κ=0.27), D2-40 (κ=0.21), ERG (κ=0.23), and was moderate for CD31 (κ=0.55). Consensus revealed that ERG nuclear immunoreactivity showed better visual contrast of LVI detection than the other staining, with improved agreement and LVI detection rate (κ=0.65, LVI positivity rate 80%).

Conclusions

The present study demonstrated a superiority with ERG immunostaining and indicated that ERG is a promising panendothelial marker that might help pathologists increase LVI detection and decrease interobserver variability in LVI diagnosis.

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Sun-Young Lee, Naohisa Yoshida, Osamu Dohi, Sang Pyo Lee, Daisuke Ichikawa, Jeong Hwan Kim, In-Kyung Sung, Hyung Seok Park, Eigo Otsuji, Yoshito Itoh, Chan Sup Shim, Hye Seung Han, Mitsuo Kishimoto, Yuji Naito
Gut and Liver.2017; 11(3): 383. CrossRef
Tumor Budding Is an Independent Adverse Prognostic Factor in Pancreatic Ductal Adenocarcinoma
Kate O’Connor, Hector H. Li-Chang, Steven E. Kalloger, Renata D. Peixoto, Douglas L. Webber, David A. Owen, David K. Driman, Richard Kirsch, Stefano Serra, Charles H. Scudamore, Daniel J. Renouf, David F. Schaeffer
American Journal of Surgical Pathology.2015; 39(4): 472. CrossRef
P2X7Receptor Expression in Coexistence of Papillary Thyroid Carcinoma with Hashimoto's Thyroiditis
Ji Hyun Kwon, Eun Sook Nam, Hyung Sik Shin, Seong Jin Cho, Hye Rim Park, Mi Jung Kwon
Korean Journal of Pathology.2014; 48(1): 30. CrossRef
Evaluation of colon cancer histomorphology: a comparison between formalin and PAXgene tissue fixation by an international ring trial
Sibylle Gündisch, Julia Slotta-Huspenina, Paolo Verderio, Chiara Maura Ciniselli, Sara Pizzamiglio, Christina Schott, Enken Drecoll, Christian Viertler, Kurt Zatloukal, Marcel Kap, Peter Riegman, Irene Esposito, Katja Specht, Gregor Babaryka, Martin Assla
Virchows Archiv.2014; 465(5): 509. CrossRef
Tumor Sprouting in Papillary Thyroid Carcinoma Is Correlated with Lymph Node Metastasis and Recurrence
Eunjung Lee, Wonkyung Jung, Jeong-Soo Woo, Jae Bok Lee, Bong Kyung Shin, Han Kyeom Kim, Aeree Kim, Baek-hui Kim
Korean Journal of Pathology.2014; 48(2): 117. CrossRef

Case Study

A Case of Multifocal Papillary Thyroid Carcinoma Consisting of One Encapsulated Follicular Variant with BRAF K601E Mutation and Three Conventional Types with BRAF V600E Mutation: Wook Youn Kim, Young Sin Ko, Tae Sook Hwang, Hye Seung Han, So Dug Lim, Wan Seop Kim, Seo Young Oh; Korean J Pathol. 2013;47(3):293-298. Published online June 25, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.3.293

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Abstract PDF

Multifocal papillary thyroid carcinoma (mPTC) comprises about 20-30% of PTC. In mPTC, individual tumor foci can be identical or frequently composed of different histological types including follicular, solid, tall-cell or conventional patterns. We report a case of mPTC consisting of one encapsulated follicular variant of papillary thyroid carcinoma (FVPTC) and three conventional PTCs in a 44-year-old woman. This case genetically demonstrates unique features including the simultaneous presence of the BRAF V600E (T1799A) mutation and the BRAF K601E (A1801G) mutation in conventional PTC and FVPTC, respectively.

Citations

Citations to this article as recorded by

BRAF K601E Mutation in Oncocytic Carcinoma of the Thyroid: A Case Report and Literature Review
Antonio Matrone, Fabrizia Citro, Carla Gambale, Alessandro Prete, Elisa Minaldi, Raffaele Ciampi, Teresa Ramone, Gabriele Materazzi, Liborio Torregrossa, Rossella Elisei
Journal of Clinical Medicine.2023; 12(22): 6970. CrossRef
Case of aggressive metastatic follicular variant papillary thyroid carcinoma with BRAF K601E and BCORL1 mutations
Doaa Attia, Alexander Lurie, Qihui Zhai, Robert Smallridge
BMJ Case Reports.2020; 13(6): e234208. CrossRef
BRAF gene: From human cancers to developmental syndromes
Muhammad Ramzan Manwar Hussain, Mukhtiar Baig, Hussein Sheik Ali Mohamoud, Zaheer Ulhaq, Daniel C. Hoessli, Ghaidaa Siraj Khogeer, Ranem Radwan Al-Sayed, Jumana Yousuf Al-Aama
Saudi Journal of Biological Sciences.2015; 22(4): 359. CrossRef
Clinical significance of BRAF V600E mutation in 154 patients with thyroid nodules
LINGYING YU, LIZHEN MA, QIAOFENG TU, YI ZHANG, YUEMING CHEN, DAOJUN YU, SHAOYU YANG
Oncology Letters.2015; 9(6): 2633. CrossRef
Clinicopathological Features of Rare BRAF Mutations in Korean Thyroid Cancer Patients
Uiju Cho, Woo Jin Oh, Ja Seong Bae, Sohee Lee, Young Sub Lee, Gyeong Sin Park, Youn Soo Lee, Chan Kwon Jung
Journal of Korean Medical Science.2014; 29(8): 1054. CrossRef
Recurrent Thyroid Papillary Carcinoma in Children Under Ten Years Old: Report of Two Cases and Literature Review
Byeong-Joo Noh, Ji-Youn Sung, Youn-Wha Kim, Yong-Koo Park
Korean Journal of Pathology.2014; 48(4): 297. CrossRef
Anaplastic Transformation of Papillary Thyroid Carcinoma in a Young Man: A Case Study with Immunohistochemical andBRAFAnalysis
Ji Hye Park, Hyeong Ju Kwon, Cheong Soo Park, SoonWon Hong
Korean Journal of Pathology.2014; 48(3): 234. CrossRef

Original Articles

Early Colorectal Epithelial Neoplasm in Korea: A Multicenter Survey of Pathologic Diagnosis: Yun Kyung Kang, So-Young Jin, Mee Soo Chang, Jung Yeon Kim, Gyeong Hoon Kang, Hye Seung Lee, Jin Hee Sohn, Ho Sung Park, Kye Won Kwon, Mi Jin Gu, Young Hee Maeng, Jong Eun Joo, Haeng Ji Kang, Hee Kyung Kim, Kee-Taek Jang, Mi Ja Lee, Hee Kyung Chang, Joon Mee Kim, Hye Seung Han, Won Ae Lee, Yoon Jung Choi, Dong Wook Kang, Sunhoo Park, Jae Hyuk Lee, Mee-Yon Cho; Korean J Pathol. 2013;47(3):245-251. Published online June 25, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.3.245

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Abstract PDF

Background

The incidence of early colorectal epithelial neoplasm (ECEN) is increasing, and its pathologic diagnosis is important for patient care. We investigated the incidence of ECEN and the current status of its pathologic diagnosis.

Methods

We collected datasheets from 25 institutes in Korea for the incidence of colorectal adenoma with high grade dysplasia (HGD) and low grade dysplasia in years 2005, 2007, and 2009; and early colorectal carcinoma in the year 2009. We also surveyed the diagnostic terminology of ECEN currently used by the participating pathologists.

Results

The average percentage of diagnoses of adenoma HGD was 7.0%, 5.0%, and 3.4% in years 2005, 2007, and 2009, respectively. The range of incidence rates of adenoma HGD across the participating institutes has gradually narrowed over the years 2005 to 2009. The incidence rate of early colorectal carcinoma in the year 2009 was 21.2%. The participants did not share a single criterion or terminology for the diagnosis of adenoma HGD. The majority accepted the diagnostic terms that distinguished noninvasive, mucosal confined, and submucosal invasive carcinoma.

Conclusions

Further research requirements suggested are a diagnostic consensus for the histopathologic diagnosis of ECEN; and standardization of diagnostic terminology critical for determining the disease code.

Citations

Citations to this article as recorded by

Diminutive and Small Colorectal Polyps: The Pathologist's Perspective
Yun Kyung Kang
Clinical Endoscopy.2014; 47(5): 404. CrossRef

Prognostic Implication of Programmed Death-1-Positive Tumor-infiltrating Lymphocytes in Diffuse Large B-Cell Lymphoma.: Young Sin Ko, Young Ha Oh, Chan Kum Park, Wook Youn Kim, Hye Seung Han, So Dug Lim, Tae Sook Hwang, Wan Seop Kim; Korean J Pathol. 2011;45(6):573-581.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.6.573

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Abstract PDF

BACKGROUND
Programmed death-1 (PD-1) is physiologically expressed by germinal center-associated helper T-cells and has an inhibitory effect on T-cell activity.
METHODS
We examined 63 cases of diffuse large B-cell lymphoma (DLBCL) and determined the number of PD-1-positive helper T-cells in a representative tumor area after immunohistochemical staining using a monoclonal antibody against PD-1. The PD-1-positive cells were counted in 3 high-power fields (HPFs; 400x).
RESULTS
Patients were divided into 2 groups: one with a high number of PD-1-positive cells (>20/HPF, n=33) and one with a low number of PD-1-positive cells (< or =20/HPF, n=30). The former group showed decreased overall survival, but at a statistically non-significant level (p=0.073). A high number of PD-1-positive cells was more common in patients at an advanced clinical stage and with high international prognostic index score (p=0.025 and p=0.026, respectively). The number of extranodal sites also somewhat correlated with the PD-1 staining status (p=0.071). However, the number of PD-1-positive cells was not associated with patient age, serum lactate dehydrogenase level, and Eastern Cooperative Oncology Group performance score.
CONCLUSIONS
The high number of PD-1-positive cells might be associated with an unfavorable outcome in DLBCL patients.

Citations

Citations to this article as recorded by

Mechanisms of PD-1/PD-L1 expression and prognostic relevance in non-Hodgkin lymphoma: a summary of immunohistochemical studies
Pauline Gravelle, Barbara Burroni, Sarah Péricart, Cédric Rossi, Christine Bezombes, Marie Tosolini, Diane Damotte, Pierre Brousset, Jean-Jacques Fournié, Camille Laurent
Oncotarget.2017; 8(27): 44960. CrossRef
Expression of programmed cell death ligand 1 (PD-L1) in advanced stage EBV-associated extranodal NK/T cell lymphoma is associated with better prognosis
Wook Youn Kim, Ho Young Jung, Soo Jeong Nam, Tae Min Kim, Dae Seog Heo, Chul-Woo Kim, Yoon Kyung Jeon
Virchows Archiv.2016; 469(5): 581. CrossRef

Clinical Usefulness of SurePath(TM) Liquid-based Cytology in Thyroid Fine Needle Aspiration: Comparison with the Conventional Smear in Diagnostic Efficacy and Applicability of BRAF Mutation Test.: Wook Youn Kim, Sang Hwa Lee, Young Sin Ko, So Dug Lim, Wan Seop Kim, Hye Seung Han, Hye Sil Seol, Seo Young Oh, Won Jin Moon, Tae Sook Hwang; Korean J Pathol. 2011;45(2):188-195.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.2.188

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Abstract PDF

BACKGROUND
Recently, liquid-based cytology (LBC) has been introduced as an alternative to the conventional smear (CS) technique in thyroid fine needle aspiration, due to its diagnostic convenience.
METHODS
We assessed 77 cases of thyroid fine needle aspiration using the SurePath(TM) method (SP) as LBC and CS via split-sample techniques. BRAF mutation tests were carried out via polymerase chain reaction and pyrosequencing immediately after diagnosis or a delay of more than one year.
RESULTS
In a comparison between SP and CS, the rate of concordance between SP and CS was as high as 84.4% (kappa value, 0.754). In comparison with histologic diagnosis, the overall sensitivity was 100% for both. The specificity was 62.5% for SP and 56.3% for CS. Relative to CS, papillary carcinomas on SP slides revealed more accentuated nuclear irregularities, nucleoli, and reduced nuclear size. In contrast to CS, the delayed BRAFV600E mutation test using SP slides after 1-2 years failed. The use of new primers amplifying shorter product size could help the delayed test achieve success.
CONCLUSIONS
Differences in the diagnostic efficacy of SP and CS were negligible. The failure of the delayed BRAF mutation test on the SP slides might be associated with DNA degradation.

Citations

Citations to this article as recorded by

Comparison of Liquid-Based Preparations with Conventional Smears in Thyroid Fine-Needle Aspirates: A Systematic Review and Meta-Analysis
Yun Jin Kang, Hyeon Woo Lee, Gulnaz Stybayeva, Se Hwan Hwang
Cancers.2024; 16(4): 751. CrossRef
Liquid‐based cytology of pigmented phaeohyphomycotic lesion of the palm masquerading as a metastatic tumor
Thara Keloth, Debasis Gochhait, S Sivaranjani, Neelaiah Siddaraju
Diagnostic Cytopathology.2019; 47(8): 828. CrossRef
DNA degradation in liquid‐based cytology and its comparison with conventional smear
Wook Youn Kim, Seo Young Oh, Hyunkyung Kim, Tae Sook Hwang
Diagnostic Cytopathology.2016; 44(5): 450. CrossRef
Comparison of EASYPREP® and SurePath® in thyroid fine‐needle aspiration
Yosep Chong, Ki Hyun Baek, Jee Young Kim, Tae‐Jung Kim, Eun Jung Lee, Chang Suk Kang
Diagnostic Cytopathology.2016; 44(4): 283. CrossRef
Conventional smears versus liquid-based preparations for thyroid fine-needle aspirates: a systematic review and meta-analysis
Neeraja Nagarajan, Alireza Najafian, Eric B. Schneider, Martha A. Zeiger, Matthew T. Olson
Journal of the American Society of Cytopathology.2015; 4(5): 253. CrossRef
Liquid‐based cytology improves preoperative diagnostic accuracy of the tall cell variant of papillary thyroid carcinoma
Sung Hak Lee, Chan Kwon Jung, Ja Seong Bae, So Lyung Jung, Yeong Jin Choi, Chang Suk Kang
Diagnostic Cytopathology.2014; 42(1): 11. CrossRef
Stability of DNA, RNA, cytomorphology, and immunoantigenicity in Residual ThinPrep® Specimens
Younghye Kim, Kap Ro Choi, Moon Jung Chae, Bong Kyung Shin, Han Kyeom Kim, Aeree Kim, Baek‐hui Kim
APMIS.2013; 121(11): 1064. CrossRef
The Development of the Liquid Cell Smear Device for Liquid-Based Cytology Test
Han Yeong Oh, Ha Ju So, Seong Hyun Kim, Dong Wook Kim, Hyun Chang Kim
Applied Mechanics and Materials.2013; 284-287: 1564. CrossRef

A Consideration of MGMT Gene Promotor Methylation Analysis for Glioblastoma Using Methylation-Specific Polymerase Chain Reaction and Pyrosequencing.: Sang Hwa Lee, Tae Sook Hwang, Young Cho Koh, Wook Youn Kim, Hye Seung Han, Wan Seop Kim, Young Sin Ko, So Dug Lim; Korean J Pathol. 2011;45(1):21-29.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.1.21

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Abstract PDF

BACKGROUND
O6-methylguanine-DNA methyltransferase (MGMT) gene promoter methylation is currently the most promising predictive marker for the outcome and benefit from temozolomide treatment in patients with glioblastoma, but there is no consensus on the analysis method for assessing the methylation status in the molecular diagnostic field. The objective of this study was to evaluate methylation-specific polymerase chain reaction (MSP) and pyrosequencing methods for assessing MGMT gene promotor methylation of glioblastoma as well as assessing the MGMT protein expression by immunohistochemistry.
METHODS
Twenty-seven cases of glioblastoma from the archives at the Department of Pathology Konkuk University Hospital were selected. MGMT promoter methylation was evaluated by MSP and the pyrosequencing methods. The MGMT expression was also measured at the protein level by immunohistochemistry.
RESULTS
Overall, MGMT hypermethylation was observed in 44.4% (12/27 cases) of the case of glioblastoma using either MSP or pyrosequencing. The concordant rate was 70.3% (19/27 cases) between MSP and pyrosequencing for MGMT methylation. There was no correlation between MGMT methylation and the protein expression. No significant differences in progression free survival and overall survival were seen between the methylated group and the unmethylated group by using either MSP or pyrosequencing. The status of the MGMT protein expression was correlated with progression free survival (p=0.026).
CONCLUSIONS
In this study the concordance rate between MSP and the pyrosequencing methods for assessing MGMT gene promotor methylation was relatively low for the cases of glioblastoma. This suggests that more reliable techniques for routine MGMT methylation study of glioblastoma remain to be developed because of quality control and assurance issues.

Citations

Citations to this article as recorded by

Prognostic Role of Methylation Status of theMGMTPromoter Determined Quantitatively by Pyrosequencing in Glioblastoma Patients
Dae Cheol Kim, Ki Uk Kim, Young Zoon Kim
Journal of Korean Neurosurgical Society.2016; 59(1): 26. CrossRef
Distinct genetic alterations in pediatric glioblastomas
Sun-ju Byeon, Jae Kyung Myung, Se Hoon Kim, Seung-Ki Kim, Ji Hoon Phi, Sung-Hye Park
Child's Nervous System.2012; 28(7): 1025. CrossRef
MGMTGene Promoter Methylation Analysis by Pyrosequencing of Brain Tumour
Young Zoon Kim, Young Jin Song, Ki Uk Kim, Dae Cheol Kim
The Korean Journal of Pathology.2011; 45(5): 455. CrossRef

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