Journal of Pathology and Translational Medicine

Jung-Soo Pyo

11 Articles

Current status of cytopathology practice in Korea: impact of the coronavirus pandemic on cytopathology practice: Soon Auck Hong, Haeyoen Jung, Sung Sun Kim, Min-Sun Jin, Jung-Soo Pyo, Ji Yun Jeong, Younghee Choi, Gyungyub Gong, Yosep Chong; J Pathol Transl Med. 2022;56(6):361-369. Published online October 27, 2022; DOI: https://doi.org/10.4132/jptm.2022.09.21

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Background
The Continuous Quality Improvement program for cytopathology in 2020 was completed during the coronavirus pandemic. In this study, we report the result of the quality improvement program.
Methods
Data related to cytopathology practice from each institute were collected and processed at the web-based portal. The proficiency test was conducted using glass slides and whole-slide images (WSIs). Evaluation of the adequacy of gynecology (GYN) slides from each institution and submission of case glass slides and WSIs for the next quality improvement program were performed.
Results
A total of 214 institutions participated in the annual cytopathology survey in 2020. The number of entire cytopathology specimens was 8,220,650, a reduction of 19.0% from the 10,111,755 specimens evaluated in 2019. Notably, the number of respiratory cytopathology specimens, including sputum and bronchial washing/ brushing significantly decreased by 86.9% from 2019, which could be attributed to the global pandemic of coronavirus disease. The ratio of cases with atypical squamous cells to squamous intraepithelial lesions was 4.10. All participating institutions passed the proficiency test and the evaluation of adequacy of GYN slides.
Conclusions
Through the Continuous Quality Improvement program, the effect of coronavirus disease 2019 pandemic, manifesting with a reduction in the number of cytologic examinations, especially in respiratory-related specimen has been identified. The Continuous Quality Improvement Program of the Korean Society for Cytopathology can serve as the gold standard to evaluate the current status of cytopathology practice in Korea.

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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.2023; 57(4): 196. CrossRef
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

Current status of cytopathology practices in Korea: annual report on the Continuous Quality Improvement program of the Korean Society for Cytopathology for 2018: Yosep Chong, Haeyoen Jung, Jung-Soo Pyo, Soon Won Hong, Hoon Kyu Oh; J Pathol Transl Med. 2020;54(4):318-331. Published online April 15, 2020; DOI: https://doi.org/10.4132/jptm.2020.02.26

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Abstract PDF Supplementary Material

Background
The Korean Society for Cytopathology has conducted the Continuous Quality Improvement program for cytopathology laboratories in Korea since 1995. In 2018 as part of the program, an annual survey of cytologic data was administered to determine the current status of cytopathology practices in Korea. Methods: A questionnaire was administered to 211 cytopathology laboratories. Individual laboratories submitted their annual statistics regarding cytopathology practices, diagnoses of gynecologic samples, inadequacy rates, and gynecologic cytology-histology correlation review (CHCR) data for 2018. In addition, proficiency tests and sample adequacy assessments were conducted using five consequent gynecologic slides. Results: Over 10 million cytologic exams were performed in 2018, and this number has almost tripled since this survey was first conducted in 2004 (compounded annual growth rate of 7.2%). The number of non-gynecologic samples has increased gradually over time and comprised 24% of all exams. The overall unsatisfactory rate was 0.14%. The ratio of the cases with atypical squamous cells to squamous intraepithelial lesions accounted for up to 4.24. The major discrepancy rate of the CHCR in gynecologic samples was 0.52%. In the proficiency test, the major discrepancy rate was approximately 1%. In the sample adequacy assessment, a discrepancy was observed in 0.1% of cases. Conclusions: This study represents the current status of cytopathology practices in Korea, illustrating the importance of the Continuous Quality Improvement program for increasing the accuracy and credibility of cytopathologic exams as well as developing national cancer exam guidelines and government projects on the prevention and treatment of cancer.

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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
Recent Application of Artificial Intelligence in Non-Gynecological Cancer Cytopathology: A Systematic Review
Nishant Thakur, Mohammad Rizwan Alam, Jamshid Abdul-Ghafar, Yosep Chong
Cancers.2022; 14(14): 3529. CrossRef
Re-Increasing Trends in Thyroid Cancer Incidence after a Short Period of Decrease in Korea: Reigniting the Debate on Ultrasound Screening
Chan Kwon Jung, Ja Seong Bae, Young Joo Park
Endocrinology and Metabolism.2022; 37(5): 816. CrossRef
Current status of cytopathology practice in Korea: impact of the coronavirus pandemic on cytopathology practice
Soon Auck Hong, Haeyoen Jung, Sung Sun Kim, Min-Sun Jin, Jung-Soo Pyo, Ji Yun Jeong, Younghee Choi, Gyungyub Gong, Yosep Chong
Journal of Pathology and Translational Medicine.2022; 56(6): 361. CrossRef

Analysis of PAX8 immunohistochemistry in lung cancers: a meta-analysis: Jae Han Jeong, Nae Yu Kim, Jung-Soo Pyo; J Pathol Transl Med. 2020;54(4):300-309. Published online July 10, 2020; DOI: https://doi.org/10.4132/jptm.2020.06.08

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Abstract PDF

Background
In this meta-analysis, we aimed to evaluate the PAX8 immunohistochemical expressions in primary lung cancers and metastatic cancers to the lung.
Methods
We identified and reviewed relevant articles from the PubMed databases. Ultimately, 18 articles were included in this meta-analysis. PAX8 expression rates were analyzed and compared between primary and metastatic lung cancers.
Results
The PAX8 expression rate in primary lung cancers was 0.042 (95% confidence interval [CI], 0.025 to 0.071). PAX8 expression rates of small cell (0.129; 95% CI, 0.022 to 0.496) and non-small cell carcinomas of the lung (0.037; 95% CI, 0.022 to 0.061) were significantly different (p=.049 in a meta-regression test). However, the PAX8 expression rates of adenocarcinoma (0.013; 95% CI, 0.006 to 0.031) and squamous cell carcinoma (0.040; 95% CI, 0.016 to 0.097) were not significantly different. PAX8 expression rates of metastatic carcinomas to the lung varied, ranging from 1.8% to 94.9%. Metastatic carcinomas from the lung to other organs had a PAX8 expression rate of 6.3%. The PAX8 expression rates of metastatic carcinomas from the female genital organs, kidneys, and thyroid gland to the lung were higher than those of other metastatic carcinomas.
Conclusions
Primary lung cancers had a low PAX8 expression rate regardless of tumor subtype. However, the PAX8 expression rates of metastatic carcinomas from the female genital organs, kidneys, and thyroid were significantly higher than those of primary lung cancers.

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Prognostic value of PAX8 in small cell lung cancer
Fengyun Tao, Hangyan Zhu, Jiayun Xu, Yanan Guo, Xin Wang, Lei Shao, Deng Pan, Guosheng Li, Rong Fang
Heliyon.2024; 10(7): e28251. CrossRef
Cystic primary squamous cell carcinoma of the thyroid
Sakurako Harada‐Kagitani, Yusuke Kouchi, Yoshiki Shinomiya, Takuto Hiramoto, Tomoyuki Arai, Toyoyuki Hanazawa, Kiyotaka Onodera, Kaito Nakama, Takanori Aihara, Masayuki Ota, Jun‐Ichiro Ikeda, Takashi Kishimoto
Pathology International.2024;[Epub] CrossRef
Immunocytochemistry of effusions: Processing and commonly used immunomarkers
Vinod B. Shidham, Beata Janikowski
Cytojournal.2022; 19: 6. CrossRef
Significance analysis of PAX8 expression in endometrial carcinoma
Shan Hu, Hua Gan, Fengmei Yang
Medicine.2022; 101(42): e31159. CrossRef

Response to Comment on “Prognostic Role of Claudin-1 Immunohistochemistry in Malignant Solid Tumors: A Meta-Analysis”: Jung-Soo Pyo, Nae Yu Kim, Won Jin Cho; J Pathol Transl Med. 2019;53(6):412-414. Published online November 1, 2019; DOI: https://doi.org/10.4132/jptm.2019.09.27

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Prognostic Role of Claudin-1 Immunohistochemistry in Malignant Solid Tumors: A Meta-Analysis: Jung-Soo Pyo, Nae Yu Kim, Won Jin Cho; J Pathol Transl Med. 2019;53(3):173-179. Published online March 5, 2019; DOI: https://doi.org/10.4132/jptm.2019.02.03

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Abstract PDF

Background
Although the correlation between low claudin-1 expression and worse prognosis has been reported, details on the prognostic implications of claudin-1 expression in various malignant tumors remain unclear. The present study aimed to elucidate the prognostic roles of claudin- 1 immunohistochemistry (IHC) in various malignant tumors through a meta-analysis.
Methods
The study included 2,792 patients from 22 eligible studies for assessment of the correlation between claudin-1 expression and survival rate in various malignant tumors. A subgroup analysis based on the specific tumor and evaluation criteria of claudin-1 IHC was conducted.
Results
Low claudin-1 expression was significantly correlated with worse overall survival (OS) (hazard ratio [HR], 1.851; 95% confidence interval [CI], 1.506 to 2.274) and disease-free survival (DFS) (HR, 2.028; 95% CI, 1.313 to 3.134) compared to high claudin-1 expression. Breast, colorectal, esophageal, gallbladder, head and neck, and lung cancers, but not cervical, liver or stomach cancers, were significantly correlated with worse OS. Breast, colorectal, esophageal, and thyroid cancers with low claudin-1 expression were associated with poorer DFS. In the lower cut-off subgroup (< 25.0%) with respect to claudin-1 IHC, low claudin-1 expression was significantly correlated with worse OS and DFS.
Conclusions
Taken together, low claudin-1 IHC expression is significantly correlated with worse survival in various malignant tumors. More detailed criteria for claudin-1 IHC expression in various malignant tumors are needed for application in daily practice.

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The Significance of Relative Claudin Expression in Odontogenic Tumors
Ekarat Phattarataratip, Kraisorn Sappayatosok
Head and Neck Pathology.2020; 14(2): 480. CrossRef
Claudin-1 upregulation is associated with favorable tumor features and a reduced risk for biochemical recurrence in ERG-positive prostate cancer
Simon Kind, Franziska Büscheck, Doris Höflmayer, Claudia Hube-Magg, Martina Kluth, Maria Christina Tsourlakis, Stefan Steurer, Till S. Clauditz, Andreas M. Luebke, Eike Burandt, Waldemar Wilczak, Andrea Hinsch, David Dum, Sören Weidemann, Christoph Fraune
World Journal of Urology.2020; 38(9): 2185. CrossRef
Characterisation of endogenous Claudin‐1 expression, motility and susceptibility to hepatitis C virus in CRISPR knock‐in cells
Camille M.H. Clément, Maika S. Deffieu, Cristina M. Dorobantu, Thomas F. Baumert, Nilda Vanesa Ayala‐Nunez, Yves Mély, Philippe Ronde, Raphael Gaudin
Biology of the Cell.2020; 112(5): 140. CrossRef
Comment on “Prognostic Role of Claudin-1 Immunohistochemistry in Malignant Solid Tumors: A Meta-Analysis”
Bolin Wang, Yan Huang
Journal of Pathology and Translational Medicine.2019; 53(6): 411. CrossRef

Prognostic Role of Metastatic Lymph Node Ratio in Papillary Thyroid Carcinoma: Jung-Soo Pyo, Jin Hee Sohn, Kyungseek Chang; J Pathol Transl Med. 2018;52(5):331-338. Published online August 30, 2018; DOI: https://doi.org/10.4132/jptm.2018.08.07

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Abstract PDF

Background
The aim of this study is to elucidate the clinicopathological significances, including the prognostic role, of metastatic lymph node ratio (mLNR) and tumor deposit diameter in papillary thyroid carcinoma (PTC) through a retrospective review and meta-analysis.
Methods
We categorized the cases into high (≥ 0.44) and low mLNR (< 0.44) and investigated the correlations with clinicopathological parameters in 64 PTCs with neck level VI lymph node (LN) metastasis. In addition, meta-analysis of seven eligible studies was used to investigate the correlation between mLNR and survival.
Results
Among 64 PTCs with neck level VI LN metastasis, high mLNR was found in 34 PTCs (53.1%). High mLNR was significantly correlated with macrometastasis (tumor deposit diameter ≥ 0.2 cm), extracapsular spread, and number of metastatic LNs. Based on linear regression test, mLNR was significantly increased by the largest LN size but not the largest metastatic LN (mLN) size. High mLNR was not correlated with nuclear factor κB or cyclin D1 immunohistochemical expression, Ki-67 labeling index, or other pathological parameters of primary tumor. Based on meta-analysis, high mLNR significantly correlated with worse disease-free survival at the 5-year and 10-year follow-up (hazard ratio [HR], 4.866; 95% confidence interval [CI], 3.527 to 6.714 and HR, 5.769; 95% CI, 2.951 to 11.275, respectively).
Conclusions
Our data showed that high mLNR significantly correlated with worse survival, macrometastasis, and extracapsular spread of mLNs. Further cumulative studies for more detailed criteria of mLNR are needed before application in daily practice.

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Thyroglobulin expression, Ki-67 index, and lymph node ratio in the prognostic assessment of papillary thyroid cancer
Helene Lindfors, Marie Karlsen, Ellinor Karlton, Jan Zedenius, Catharina Larsson, Catharina Ihre Lundgren, C. Christofer Juhlin, Ivan Shabo
Scientific Reports.2023;[Epub] CrossRef
Incidental Node Metastasis as an Independent Factor of Worse Disease-Free Survival in Patients with Papillary Thyroid Carcinoma
Renan Aguera Pinheiro, Ana Kober Leite, Beatriz Godoi Cavalheiro, Evandro Sobroza de Mello, Luiz Paulo Kowalski, Leandro Luongo Matos
Cancers.2023; 15(3): 943. CrossRef
A High-Quality Nomogram for Predicting Lung Metastasis in Newly Diagnosed Stage IV Thyroid Cancer: A Population-Based Study
WenYi Wang, JiaJing Liu, XiaoFan Xu, LiQun Huo, XuLin Wang, Jun Gu
Technology in Cancer Research & Treatment.2023; 22: 153303382311678. CrossRef
Lymph Node Ratio Predicts Recurrence in Patients with Papillary Thyroid Carcinoma with Low Lymph Node Yield
Il Ku Kang, Joonseon Park, Ja Seong Bae, Jeong Soo Kim, Kwangsoon Kim
Cancers.2023; 15(11): 2947. CrossRef
Superiority of metastatic lymph node ratio over number of node metastases and TNM/AJCC N classification in predicting cancer‐specific survival in medullary thyroid cancer
Andreas Machens, Kerstin Lorenz, Frank Weber, Henning Dralle
Head & Neck.2022; 44(12): 2717. CrossRef
Value of Combining Clinical Factors, Conventional Ultrasound, and Contrast-Enhanced Ultrasound Features in Preoperative Prediction of Central Lymph Node Metastases of Different Sized Papillary Thyroid Carcinomas
Yanfang Wang, Fang Nie, Guojuan Wang, Ting Liu, Tiantian Dong, Yamin Sun
Cancer Management and Research.2021; Volume 13: 3403. CrossRef
Atypical Histiocytoid Cells and Multinucleated Giant Cells in Fine-Needle Aspiration Cytology of the Thyroid Predict Lymph Node Metastasis of Papillary Thyroid Carcinoma
Ji Eun Choi, Ja Seong Bae, Dong-Jun Lim, So Lyung Jung, Chan Kwon Jung
Cancers.2019; 11(6): 816. CrossRef
Patients Aged ≥55 Years With Stage T1-2N1M1 Differentiated Thyroid Cancer Should Be Downstaged in the Eighth Edition AJCC/TNM Cancer Staging System
Zeming Liu, Sichao Chen, Yihui Huang, Di Hu, Min Wang, Wei Wei, Chao Zhang, Wen Zeng, Liang Guo
Frontiers in Oncology.2019;[Epub] CrossRef
Prognostic Implication of Metastatic Lymph Node Ratio in Colorectal Cancers: Comparison Depending on Tumor Location
Jung-Soo Pyo, Young-Min Shin, Dong-Wook Kang
Journal of Clinical Medicine.2019; 8(11): 1812. CrossRef

Detection of Tumor Multifocality Is Important for Prediction of Tumor Recurrence in Papillary Thyroid Microcarcinoma: A Retrospective Study and Meta-Analysis: Jung-Soo Pyo, Jin Hee Sohn, Guhyun Kang; J Pathol Transl Med. 2016;50(4):278-286. Published online June 6, 2016; DOI: https://doi.org/10.4132/jptm.2016.03.29

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Abstract PDF

Background
The clinicopathological characteristics and conclusive treatment modality for multifocal papillary thyroid microcarcinoma (mPTMC) have not been fully established.
Methods
A retrospective study, systematic review, and meta-analysis were conducted to elucidate the clinicopathological significance of mPTMC. We investigated the multiplicity of 383 classical papillary thyroid microcarcinomas (PTMCs) and the clinicopathological significance of incidental mPTMCs. Correlation between tumor recurrence and multifocality in PTMCs was evaluated through a systematic review and meta-analysis.
Results
Tumor multifocality was identified in 103 of 383 PTMCs (26.9%). On linear regression analysis, primary tumor diameter was significantly correlated with tumor number (R²=0.014, p=.021) and supplemental tumor diameter (R²=0.117, p=.023). Of 103 mPTMCs, 61 (59.2%) were non-incidental, with tumor detected on preoperative ultrasonography, and 42 (40.8%) were diagnosed (incidental mPTMCs) on pathological examination. Lymph node metastasis and higher tumor stage were significantly correlated with tumor multifocality. However, there was no difference in nodal metastasis or tumor stage between incidental and non-incidental mPTMCs. On meta-analysis, tumor multifocality was significantly correlated with tumor recurrence in PTMCs (odds ratio, 2.002; 95% confidence interval, 1.475 to 2.719, p<.001).
Conclusions
Our results show that tumor multifocality in PTMC, regardless of manner of detection, is significantly correlated with aggressive tumor behavior.

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E. V. Ryabchenko
Head and Neck Tumors (HNT).2023; 12(4): 71. CrossRef
Individual risk factors for recurrence after hemithyroidectomy and thyroidectomy in patients with papillary thyroid microcarcinoma in the presence of autoimmune thyroiditis
E.V. Ryabchenko
Onkologiya. Zhurnal imeni P.A.Gertsena.2023; 12(3): 20. CrossRef
The value of total tumor diameter in unilateral multifocal papillary thyroid carcinoma: a propensity score matching analysis
Zhu-juan Wu, Bao-ying Xia, Zi-wei Chen, Hao Gong, Munire Abuduwaili, Zhi-chao Xing, An-ping Su
Frontiers in Endocrinology.2023;[Epub] CrossRef
Negative Histopathological Prognostic Factors Affecting Morbidity in T1 Differentiated Thyroid Carcinoma
Mine Araz, Elgin Özkan, Pınar Gunduz, Cigdem Soydal, N. Özlem Küçük, K. Metin Kır
Cancer Biotherapy and Radiopharmaceuticals.2022; 37(1): 56. CrossRef
Total tumor diameter is a better indicator of multifocal papillary thyroid microcarcinoma: A propensity score matching analysis
Ke-cheng Jiang, Bei Lin, Yu Zhang, Ling-qian Zhao, Ding-cun Luo
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The relationship between lipotoxicity and risk of extrathyroidal extension in papillary thyroid microcarcinoma
Changlin Li, Haixia Guan, Qiao He, Yishen Zhao, Nan liang, Jiao Zhang, Gianlorenzo Dionigi, Hui Sun
Endocrine.2021; 74(3): 646. CrossRef
Multifocality and Progression of Papillary Thyroid Microcarcinoma During Active Surveillance
Ryuta Nagaoka, Aya Ebina, Kazuhisa Toda, Tomoo Jikuzono, Marie Saitou, Masaomi Sen, Hiroko Kazusaka, Mami Matsui, Keiko Yamada, Hiroki Mitani, Iwao Sugitani
World Journal of Surgery.2021; 45(9): 2769. CrossRef
Correlation of ThyroSeq Results with Surgical Histopathology in Cytologically Indeterminate Thyroid Nodules
Patrick D. Chin, Catherine Y. Zhu, Dipti P. Sajed, Gregory A. Fishbein, Michael W. Yeh, Angela M. Leung, Masha J. Livhits
Endocrine Pathology.2020; 31(4): 377. CrossRef
Application of Ultrasonography in the Diagnosis and Management of Papillary Thyroid Microcarcinoma
Huang, MD Kun, Liu, MD Ji-Bin
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Analysis of Malignant Thyroid Neoplasms with a Striking Rise of Papillary Microcarcinoma in an Endemic Goiter Region
Alka Mary Mathai, K. Preetha, S. Valsala Devi, Sam Vicliph, Raja Pradeep, Aqib Shaick
Indian Journal of Otolaryngology and Head & Neck Surgery.2019; 71(S1): 121. CrossRef
The first postoperative-stimulated serum thyroglobulin is a prognostic factor for thyroid microcarcinomas
Isabela de Oliveira Amui, José Vicente Tagliarini, Emanuel C. Castilho, Mariângela de Alencar Marques, Yoshio Kiy, José Eduardo Corrente, Gláucia M.F.S. Mazeto
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Surgical management of follicular thyroid carcinoma in children and adolescents: A study of 30 cases
Claudio Spinelli, Leonardo Rallo, Riccardo Morganti, Valentina Mazzotti, Alessandro Inserra, Giovanni Cecchetto, Maura Massimino, Paola Collini, Silvia Strambi
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Contrastive study of two screening criteria for active surveillance in patients with low-risk papillary thyroid microcarcinoma: a retrospective analysis of 1001 patients
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Core Needle Biopsy Is a More Conclusive Follow-up Method Than Repeat Fine Needle Aspiration for Thyroid Nodules with Initially Inconclusive Results: A Systematic Review and Meta-Analysis: Jung-Soo Pyo, Jin Hee Sohn, Guhyun Kang; J Pathol Transl Med. 2016;50(3):217-224. Published online April 14, 2016; DOI: https://doi.org/10.4132/jptm.2016.02.15

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Abstract PDF

Background
This study investigated the appropriate management of thyroid nodules with prior non-diagnostic or atypia of undetermined significance/follicular lesion of undetermined significance (AUS/FLUS) through a systematic review and meta-analysis.
Methods
This study included 4,235 thyroid nodules from 26 eligible studies. We investigated the conclusive rate of follow-up core needle biopsy (CNB) or repeat fine needle aspiration (rFNA) after initial fine needle aspiration (FNA) with non-diagnostic or AUS/FLUS results. A diagnostic test accuracy (DTA) review was performed to determine the diagnostic role of the follow-up CNB and to calculate the area under the curve (AUC) on the summary receiver operating characteristic (SROC) curve.
Results
The conclusive rates of follow-up CNB and rFNA after initial FNA were 0.879 (95% confidence interval [CI], 0.801 to 0.929) and 0.684 (95% CI, 0.627 to 0.736), respectively. In comparison of the odds ratios of CNB and rFNA, CNB had more frequent conclusive results than rFNA (odds ratio, 5.707; 95% CI, 2.530 to 12.875). Upon subgroup analysis, follow-up CNB showed a higher conclusive rate than rFNA in both initial non-diagnostic and AUS/FLUS subgroups. In DTA review of followup CNB, the pooled sensitivity and specificity were 0.94 (95% CI, 0.88 to 0.97) and 0.88 (95% CI, 0.84 to 0.91), respectively. The AUC for the SROC curve was 0.981, nearing 1.
Conclusions
Our results show that CNB has a higher conclusive rate than rFNA when the initial FNA produced inconclusive results. Further prospective studies with more detailed criteria are necessary before follow-up CNB can be applied in daily practice.

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MUC2 Expression Is Correlated with Tumor Differentiation and Inhibits Tumor Invasion in Gastric Carcinomas: A Systematic Review and Meta-analysis: Jung-Soo Pyo, Jin Hee Sohn, Guhyun Kang, Dong-Hoon Kim, Kyungeun Kim, In-Gu Do, Dong Hyun Kim; J Pathol Transl Med. 2015;49(3):249-256. Published online May 15, 2015; DOI: https://doi.org/10.4132/jptm.2015.03.27

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Background
While MUC2 is expressed in intestinal metaplasia and malignant lesions, the clinico-pathological significance of MUC2 expression is not fully elucidated in gastric carcinoma (GC). Methods: The present study investigated the correlation between MUC2 expression and clinico-pathological parameters in 167 human GCs. In addition, to confirm the clinicopathological significance of MUC2 expression, we performed a systematic review and meta-analysis in 1,832 GCs. Results: MUC2 expression was found in 58 of 167 GCs (34.7%). MUC2-expressing GC showed lower primary tumor (T), regional lymph node (N), and tumor node metastasis (TNM) stages compared with GCs without MUC2 expression (p=.001, p=.001, and p=.011, respectively). However, MUC2 expression was not correlated with Lauren’s classification and tumor differentiation. In meta-analysis, MUC2 expression was significantly correlated with differentiation and lower tumor stage (odds ratio [OR], 1.303; 95% confidence interval [CI], 1.020 to 1.664; p = .034 and OR, 1.352; 95% CI, 1.055 to 1.734; p = .017, respectively) but not with Lauren’s classification, pN stage, or pTNM stage. Conclusions: MUC2 expression was correlated with a lower tumor depth and lower lymph node metastasis in our study; the meta-analysis showed a correlation of MUC2 expression with tumor differentiation and lower tumor depth.

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Traumatic Bowel Perforation and Inguinal Hernia Masking a Mesenteric Calcifying Fibrous Tumor: Dong Hyun Kim, Kyueng-Whan Min, Dong-Hoon Kim, Seoung Wan Chae, Jin Hee Sohn, Jung-Soo Pyo, Sung-Im Do, Kyungeun Kim, Hyun Joo Lee; J Pathol Transl Med. 2015;49(3):267-269. Published online May 15, 2015; DOI: https://doi.org/10.4132/jptm.2015.03.20

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Calcifying Fibrous Tumor
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Extranodal Follicular Dendritic Cell Sarcoma with Rapid Growth in Parapharynx: A Case Report: Jung-Soo Pyo, Guhyun Kang, Sung-Im Do, Seoung Wan Chae, Kyungeun Kim, Sang Hyuk Lee, Yoon-La Choi, Joon Hyuk Choi, Jin Hee Sohn, Dong-Hoon Kim; Korean J Pathol. 2012;46(3):306-310. Published online June 22, 2012; DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.3.306

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Follicular dendritic cell sarcoma (FDCS) is a rare malignancy arising from the antigen-presenting cells in the lymph node and extranodal tissue. We describe a 31-year-old male patient who presented with a swelling of the left parapharynx. The radiologic findings showed a 4.7×4.5×1.9 cm-sized, ill-defined mass in the left parapharyngeal space. A fine-needle aspiration cytology was performed and it showed scattered, irregular, cohesive clusters of tumor cells with a spindle-to-ovoid shape with irregular contours in a background of lymphocytes. Based on these findings, a diagnosis of spindle cell neoplasm was made. The surgically resected tumor was composed of elongated, ovoid or polygonal cells showing positive immunohistochemistry for CD21, CD23, and CD35. Postoperatively, the residual tumor was observed to undergo a rapidly growth. There is an overlap in the cytologic and histologic findings between FDCS of the parapharynx and other tumors. Pathologists should therefore be aware of its characteristics not only to provide an accurate diagnosis but also to recommend the appropriate clinical management.

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