Journal of Pathology and Translational Medicine

Original Articles

Loss of aquaporin-1 expression is associated with worse clinical outcomes in clear cell renal cell carcinoma: an immunohistochemical study: Seokhyeon Lee, Bohyun Kim, Minsun Jung, Kyung Chul Moon; J Pathol Transl Med. 2023;57(4):232-237. Published online July 11, 2023; DOI: https://doi.org/10.4132/jptm.2023.06.17

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Background
Aquaporin (AQP) expression has been investigated in various malignant neoplasms, and the overexpression of AQP is related to poor prognosis in some malignancies. However, the expression of AQP protein in clear cell renal cell carcinoma (ccRCC) has not been extensively investigated by immunohistochemistry with large sample size.
Methods
We evaluated the AQP expression in 827 ccRCC with immunohistochemical staining in tissue microarray blocks and classified the cases into two categories, high and low expression.
Results
High expression of aquaporin-1 (AQP1) was found in 320 cases (38.7%), but aquaporin-3 was not expressed in ccRCC. High AQP1 expression was significantly related to younger age, low TNM stage, low World Health Organization/International Society of Urologic Pathology nuclear grade, and absence of distant metastasis. Furthermore, high AQP1 expression was also significantly associated with longer overall survival (OS; p<.001) and progression-specific survival (PFS; p<.001) and was an independent predictor of OS and PFS in ccRCC.
Conclusions
Our study revealed the prognostic significance of AQP1 protein expression in ccRCC. These findings could be applied to predict the prognosis of ccRCC.

Citations

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Serum Exosomal MiR-874 as a Potential Biomarker for Nonsmall Cell Lung Cancer Diagnosis and Prognosis
Amal F. Gharib, Saad S. Al-Shehri, Abdulraheem Almalki, Ayman Alhazmi, Mamdouh Allahyani, Ahmed Alghamdi, Amani A. Alrehaili, Maha M. Bakhuraysah, Althobaiti Naif Saad M., Weal H. Elsawy
Indian Journal of Medical and Paediatric Oncology.2024;[Epub] CrossRef

Intraosseous Hibernoma: A Rare and Unique Intraosseous Lesion: Boram Song, Hye Jin Ryu, Cheol Lee, Kyung Chul Moon; J Pathol Transl Med. 2017;51(5):499-504. Published online August 22, 2017; DOI: https://doi.org/10.4132/jptm.2017.07.28

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Abstract PDF

Background
Hibernoma is a rare benign tumor of adults that is composed of multivacuolated adipocytes resembling brown fat cells. Hibernoma typically occurs in soft tissue, and intraosseous examples are very rare. Intraosseous hibernomas can radiologically mimic metastatic carcinoma and other tumorous conditions. Methods: To collect the intraosseous hibernomas, we searched the pathologic database and reviewed the hematoxylin and eosin (H&E)–stained slides of bone biopsy samples performed to differentiate radiologically abnormal bone lesions from 2006 to 2016. A total of six intraosseous hibernoma cases were collected, and clinical and radiological information was verified from electronic medical records. H&E slide review and immunohistochemical staining for CD68, pan-cytokeratin, and S-100 protein were performed. Results: Magnetic resonance imaging of intraosseous hibernomas showed low signal intensity with slightly hyperintense foci on T1 and intermediate to high signal intensity on T2 weighted images. Intraosseous hibernomas appeared as heterogeneous sclerotic lesions with trabecular thickening on computed tomography scans and revealed mild hypermetabolism on positron emission tomography scans. Histopathologically, the bone marrow space was replaced by sheets of multivacuolated, foamy adipocytes resembling brown fat cells, without destruction of bone trabeculae. In immunohistochemical analysis, the tumor cells were negative for CD68 and pan-cytokeratin and positive for S-100 protein. Conclusions: Intraosseous hibernoma is very rare. This tumor can be overlooked due to its rarity and resemblance to bone marrow fat. Pathologists need to be aware of this entity to avoid misdiagnosis of this rare lesion.

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A Rare Case of Large Lateral Chest Wall Hibernoma
Lyubomir Gaydarski, Boycho Landzhov, Ivaylo Kamenov, Julian M Ananiev, Georgi P Georgiev
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Intraosseous hibernoma mimicking sclerotic bone metastasis—a case report
Ali Shaikh, Adil Basha, George Ray, Justin A. Bishop, Avneesh Chhabra
Skeletal Radiology.2024;[Epub] CrossRef
Femoral hibernoma: unique intraosseous tumor
Gökhan Tonkaz, Ertugrul Cakir, Mehmet Tonkaz, Demet Sengul
Wiener klinische Wochenschrift.2024; 136(19-20): 581. CrossRef
Unusual Imaging Findings of Epithelioid Hemangioma: Case Report of Single Intramedullary Sclerotic Bone Lesion
Yun Chul Hwang, Tae Eun Kim, Jae Hyuck Yi
Journal of the Korean Society of Radiology.2024; 85(5): 986. CrossRef
Benign incidental do-not-touch bone lesions
Nuttaya Pattamapaspong, Wilfred CG Peh
The British Journal of Radiology.2023;[Epub] CrossRef
Intraosseous hibernoma: clinicopathologic and imaging analysis of 18 cases
Chiraag N Gangahar, Carina A Dehner, David P Wang, Behrang Amini, Travis Hillen, Christopher O'Conor, Sydney N Jennings, Kathleen Byrnes, Elizabeth A Montgomery, Bogdan A Czerniak, Julia A Bridge, Molly C Schroeder, Jack W Jennings, Wei‐Lien Wang, John S
Histopathology.2023; 83(1): 40. CrossRef
Intraosseous Hibernoma: A Rare Entity in Orthopedics With Peculiar Radiological Features
Ramy Samargandi, Louis-Romée Le Nail, Gonzague de Pinieux, Matthias Tallegas, Elodie Miquelestorena-Standley
Cureus.2023;[Epub] CrossRef
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Salvatore Gitto, Thom Doeleman, Michiel A. J. van de Sande, Kirsten van Langevelde
Skeletal Radiology.2022; 51(6): 1325. CrossRef
Intraosseous hibernoma: Two case reports and a review of the literature
Samantha N. Weiss, Ankit Mohla, Gord Guo Zhu, Christina Gutowski, Tae Won B Kim, Rohan Amin
Radiology Case Reports.2022; 17(7): 2477. CrossRef
Hibernoma of two contiguous vertebrae: uniqueness of a lesion already rare in itself
Donato MASTRANTUONO, Domenico MARTORANO, Guido REGIS, Federica ARABIA, Alessandra LINARI, Federica SANTORO
Journal of Radiological Review.2022;[Epub] CrossRef
Primary extradural tumors of the spinal column
Varun Arvind, Edin Nevzati, Maged Ghaly, Mansoor Nasim, Mazda Farshad, Roman Guggenberger, Daniel Sciubba, Alexander Spiessberger
Journal of Craniovertebral Junction and Spine.2021; 12(4): 336. CrossRef
Spinal Intraosseous Hibernoma: A Case Report and Review of Literature
Mi-Kyung Um, Eugene Lee, Joon Woo Lee, Kyu Sang Lee, Yusuhn Kang, Joong Mo Ahn, Heung Sik Kang
Journal of the Korean Society of Radiology.2020; 81(4): 965. CrossRef
Intraosseous hibernoma: A metastatic mimicker to consider on the differential
Allen Ko, Colin C. Rowell, James B. Vogler, Dmitri E. Samoilov
Radiology Case Reports.2020; 15(12): 2677. CrossRef
Co-expression of MDM2 and CDK4 in transformed human mesenchymal stem cells causes high-grade sarcoma with a dedifferentiated liposarcoma-like morphology
Yu Jin Kim, Mingi Kim, Hyung Kyu Park, Dan Bi Yu, Kyungsoo Jung, Kyoung Song, Yoon-La Choi
Laboratory Investigation.2019; 99(9): 1309. CrossRef
Intraosseous Hibernoma: Five Cases and a Review of the Literature
Francisco A. Myslicki, Andrew E. Rosenberg, Ivan Chaitowitz, Ty K. Subhawong
Journal of Computer Assisted Tomography.2019; 43(5): 793. CrossRef
Hibernoma Mimicking Atypical Lipomatous Tumor
Youssef Al Hmada, Inga-Marie Schaefer, Christopher D.M. Fletcher
American Journal of Surgical Pathology.2018; 42(7): 951. CrossRef

Implication of PHF2 Expression in Clear Cell Renal Cell Carcinoma: Cheol Lee, Bohyun Kim, Boram Song, Kyung Chul Moon; J Pathol Transl Med. 2017;51(4):359-364. Published online June 13, 2017; DOI: https://doi.org/10.4132/jptm.2017.03.16

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Abstract PDF

Background
Clear cell renal cell carcinoma (CCRCC) is presumed to be associated with adipogenic differentiation. Histone modification is known to be important for adipogenesis, and the function of histone demethylase plant homeodomain finger 2 (PHF2) has been noted. In addition, PHF2 may act as a tumor suppressor via epigenetic regulation of p53 and is reported to be reduced in colon cancer and stomach cancer tissues. In this study, we examined PHF2 expression in CCRCC specimens by immunohistochemistry.
Methods
We studied 254 CCRCCs and 56 non-neoplastic renal tissues from patients who underwent radical or partial nephrectomy between 2000 and 2003 at the Seoul National University Hospital. Tissue microarray blocks were prepared, and immunohistochemical staining for PHF2 was performed.
Results
Among 254 CCRCC cases, 150 cases (59.1%) showed high expression and 104 cases (40.1%) showed low expression. High expression of PHF2 was significantly correlated with a low Fuhrman nuclear grade (p < .001), smaller tumor size (p < .001), low overall stage (p = .003), longer cancer-specific survival (p = .002), and progression-free survival (p < .001) of the patients. However, it was not an independent prognostic factor in multivariate analysis adjusted for Fuhrman nuclear grade and overall stage.
Conclusions
Our study showed that low expression of PHF2 is associated with aggressiveness and poor prognosis of CCRCC.

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Yanguang Hou, Yan Yuan, Yanze Li, Lei Wang, Juncheng Hu, Xiuheng Liu
Molecular Biology Reports.2023; 50(3): 2735. CrossRef
Phosphorylation of PHF2 by AMPK releases the repressive H3K9me2 and inhibits cancer metastasis
Ying Dong, Hao Hu, Xuan Zhang, Yunkai Zhang, Xin Sun, Hanlin Wang, Weijuan Kan, Min-jia Tan, Hong Shi, Yi Zang, Jia Li
Signal Transduction and Targeted Therapy.2023;[Epub] CrossRef
HIF-1α-mediated augmentation of miRNA-18b-5p facilitates proliferation and metastasis in osteosarcoma through attenuation PHF2
Peng Luo, Yan-dong Zhang, Feng He, Chang-jun Tong, Kai Liu, He Liu, Shi-zhuang Zhu, Jian-zhou Luo, Bing Yuan
Scientific Reports.2022;[Epub] CrossRef
Integration of meta-analysis and supervised machine learning for pattern recognition in breast cancer using epigenetic data
Reza Panahi, Esmaeil Ebrahimie, Ali Niazi, Alireza Afsharifar
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PHF2 regulates homology-directed DNA repair by controlling the resection of DNA double strand breaks
Ignacio Alonso-de Vega, Maria Cristina Paz-Cabrera, Magdalena B Rother, Wouter W Wiegant, Cintia Checa-Rodríguez, Juan Ramón Hernández-Fernaud, Pablo Huertas, Raimundo Freire, Haico van Attikum, Veronique A J Smits
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Emerging of lysine demethylases (KDMs): From pathophysiological insights to novel therapeutic opportunities
Sarder Arifuzzaman, Mst Reshma Khatun, Rabeya Khatun
Biomedicine & Pharmacotherapy.2020; 129: 110392. CrossRef
Biology and targeting of the Jumonji-domain histone demethylase family in childhood neoplasia: a preclinical overview
Tyler S. McCann, Lays M. Sobral, Chelsea Self, Joseph Hsieh, Marybeth Sechler, Paul Jedlicka
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MiR-221 Promotes Hepatocellular Carcinoma Cells Migration via Targeting PHF2
Yi Fu, Mingyan Liu, Fengxia Li, Li Qian, Ping Zhang, Fengwei Lv, Wenting Cheng, Ruixing Hou
BioMed Research International.2019; 2019: 1. CrossRef
PHF2 histone demethylase prevents DNA damage and genome instability by controlling cell cycle progression of neural progenitors
Stella Pappa, Natalia Padilla, Simona Iacobucci, Marta Vicioso, Elena Álvarez de la Campa, Claudia Navarro, Elia Marcos, Xavier de la Cruz, Marian A. Martínez-Balbás
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Plant homeodomain finger protein 2 as a novel IKAROS target in acute lymphoblastic leukemia
Zheng Ge, Yan Gu, Qi Han, Justin Sloane, Qinyu Ge, Goufeng Gao, Jinlong Ma, Huihui Song, Jiaojiao Hu, Baoan Chen, Sinisa Dovat, Chunhua Song
Epigenomics.2018; 10(1): 59. CrossRef

Case Studies

Perivascular Epithelioid Cell Tumor in the Stomach: Sun Ah Shin, Jiwoon Choi, Kyung Chul Moon, Woo Ho Kim; J Pathol Transl Med. 2017;51(4):428-432. Published online April 4, 2017; DOI: https://doi.org/10.4132/jptm.2016.09.16

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Abstract PDF

Perivascular epithelioid cell tumors or PEComas can arise in any location in the body. However, a limited number of cases of gastric PEComa have been reported. We present two cases of gastric PEComas. The first case involved a 62-year-old woman who presented with a 4.2 cm gastric subepithelial mass in the prepyloric antrum, and the second case involved a 67-year-old man with a 5.0 cm mass slightly below the gastroesophageal junction. Microscopic examination revealed that both tumors were composed of perivascular epithelioid cells that were immunoreactive for melanocytic and smooth muscle markers. Prior to surgery, the clinical impression of both tumors was gastrointestinal stromal tumor (GIST), and the second case was erroneously diagnosed as GIST even after microscopic examination. Although gastric PEComa is a very rare neoplasm, it should be considered in the differential diagnosis of gastric submucosal lesions.

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Unusual paediatric sigmoid perivascular epithelioid cell tumour with regional lymph node metastasis treated using gemcitabine and docetaxel: a case report and literature review
Hsiu-Chung Cheng, Chia-Yu Kuo, Ching-Wen Huang, Hsiang-Hung Shih, Chih-Hung Lin, Jaw-Yuan Wang
Journal of International Medical Research.2021;[Epub] CrossRef
Gastric Perivascular Epithelioid Cell Tumor (PEComa)
Jinghong Xu, Yu Yan, Xueping Xiang, Peter Jiang, Xiangrong Hu, Wenjun Yang
American Journal of Clinical Pathology.2019; 152(2): 221. CrossRef
Robotic wedge resection of a rare gastric perivascular epithelioid cell tumor: A case report
Alessandra Marano, Francesca Maione, Yanghee Woo, Luca Pellegrino, Paolo Geretto, Diego Sasia, Mirella Fortunato, Giulio Fraternali Orcioni, Roberto Priotto, Renato Fasoli, Felice Borghi
World Journal of Clinical Cases.2019; 7(23): 4011. CrossRef

Mucinous Cystadenoma of the Testis: A Case Report with Immunohistochemical Findings: Gilhyang Kim, Dohee Kwon, Hee Young Na, Sehui Kim, Kyung Chul Moon; J Pathol Transl Med. 2017;51(2):180-184. Published online February 13, 2017; DOI: https://doi.org/10.4132/jptm.2016.08.30

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Abstract PDF

Mucinous cystadenoma of the testis is a very rare tumor. Herein, we report a case of mucinous cystadenoma arising in the testis of a 61-year-old man, along with a literature review. Computed tomography showed a 2.5-cm-sized poorly enhancing cystic mass. Grossly, the tumor was a unilocular cystic mass filled with mucinous material and confined to the testicular parenchyma. Histologically, the cyst had a fibrotic wall lined by mucinous columnar epithelium without atypia. Immunohistochemical staining was positive for cytokeratin 20 and CDX2, as well as focally positive for cytokeratin 7. The pathologic diagnosis was mucinous cystadenoma.

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Review of Paratesticular Appendageal Tumors, Morphology, Immunohistochemistry, and Recent Molecular Advances
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Linlin Zhang, Jianyuan Xuan, Manxi Li, Mei Zhang, Yu Song, Ziang Pan, Bo Fan, Lin Lu, Hongyan Zhou, Yang Li
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Primary Borderline Mucinous Testicular Tumor: A Case Report and Literature Review
Changjuan Hao, Chunsong Kang, Xiaoyan Kang, Zhuanzhuan Yu, Tingting Li, Jiping Xue
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Michelle S Lin, Alberto G Ayala, Jae Y Ro
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Borderline Mucinous Testicular Tumour: Diagnostic and Management difficulties
Krishan Pratap, Marlon Perera, Frances Malczewski, Rachel Esler
BMJ Case Reports.2018; : bcr-2017-223787. CrossRef
Mucinous tumor arising in a giant sacrococcygeal teratoma
Fengtian Zhang, Xiaolong Yu, Jin Zeng, Min Dai
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Original Article

Comparison of the FDA and ASCO/CAP Criteria for HER2 Immunohistochemistry in Upper Urinary Tract Urothelial Carcinoma: Gilhyang Kim, Yul Ri Chung, Bohyun Kim, Boram Song, Kyung Chul Moon; J Pathol Transl Med. 2016;50(6):436-441. Published online October 10, 2016; DOI: https://doi.org/10.4132/jptm.2016.07.12

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Abstract PDF

Background
Human epidermal growth factor receptor 2 (HER2) is one of the known oncogenes in urothelial carcinoma. However, the association between HER2 and the prognosis of upper urinary tract urothelial carcinoma (UUTUC) has not yet been fully clarified. The aim of this study was to evaluate HER2 expression using the United States Food and Drug Administration (FDA) criteria and American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) criteria and compare their prognostic significance in UUTUC.
Methods
HER2 expression was evaluated in 144 cases of UUTUC by immunohistochemistry (IHC) using tissue microarrays. We separately analyzed HER2 expression using the FDA and ASCO/CAP criteria. The IHC results were categorized into low (0, 1+) and high (2+, 3+) groups.
Results
Using the FDA criteria, 94 cases were negative, 38 cases were 1+, nine cases were 2+, and three cases were 3+. Using the ASCO/CAP criteria, 94 cases were negative, 34 cases were 1+, 13 cases were 2+, and three cases were 3+. Four cases showing 2+ according to the ASCO/CAP criteria were reclassified as 1+ by the FDA criteria. High HER2 expression by both the FDA criteria and ASCO/CAP criteria was significantly associated with International Society of Urological Pathology high grade (p = .001 and p < .001). The high HER2 expression group classified with the FDA criteria showed significantly shorter cancer-specific survival (p = .004), but the HER2 high and low expression groups classified with the ASCO/CAP criteria did not show significant differences (p = .161) in cancer-specific survival.
Conclusions
HER2 high expression groups were significantly associated with shorter cancer-specific survival, and our study revealed that the FDA criteria are more suitable for determining HER2 expression in UUTUC.

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A systematic review and meta-analysis for human epidermal growth factor receptor 2 on upper tract urothelial carcinoma patients
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ERBB2 Amplification as a Predictive and Prognostic Biomarker in Upper Tract Urothelial Carcinoma
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Cancers.2022; 14(12): 2996. CrossRef
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Manuela Costantini, Carla Azzurra Amoreo, Liborio Torregrossa, Greta Alì, Enrico Munari, Carmen Jeronimo, Rui Henrique, Sara Petronilho, Umberto Capitanio, Roberta Lucianò, Nazareno Suardi, Maria Teresa Landi, Umberto Anceschi, Aldo Brassetti, Vito Michel
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Brief Case Report

Squamous Cell Carcinoma of the Seminal Vesicle from Zinner Syndrome: A Case Report and Review of Literature: Younghoon Kim, Hae Woon Baek, Eunoh Choi, Kyung Chul Moon; J Pathol Transl Med. 2015;49(1):85-88. Published online January 15, 2015; DOI: https://doi.org/10.4132/jptm.2014.10.28

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Zinner syndrome: a rare diagnosis in infancy
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Original Articles

Transglutaminase 2 Expression and Its Prognostic Significance in Clear Cell Renal Cell Carcinoma: Min Jee Park, Hae Woon Baek, Ye-Young Rhee, Cheol Lee, Jeong Whan Park, Hwal Woong Kim, Kyung Chul Moon; J Pathol Transl Med. 2015;49(1):37-43. Published online January 15, 2015; DOI: https://doi.org/10.4132/jptm.2014.10.25

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Abstract PDF

Background
A few recent studies have demonstrated a possible role of transglutaminase 2 (TG2) in tumorigenesis or progression of renal cell carcinoma (RCC). The aim of this study was to examine TG2 expression and its clinicopathologic significance in a large number of human clear cell RCCs (CCRCCs). Methods: We analyzed 638 CCRCC patients who underwent partial or radical nephrectomy between 1995 and 2005. The expression of TG2 was determined by immunohistochemistry and categorized into four groups, according to staining intensity: negative (0), mild (1+), moderate (2+), and strong (3+). Results: TG2 staining intensity was negative in 8.5% of CCRCC (n=54), 1+ in 32.6% (n=208), 2+ in 50.5% (n=322), and 3+ in 8.5% (n=54). Strong TG2 expression was correlated with high Fuhrman nuclear grade (p=.011), high T category (p=.049), metastasis (p=.043) and male sex (p<.001) but not with N category.The survival analysis showed a significant association between strong TG2 expression and worse overall and cancer-specific survival (p=.027 and p=.010, respectively). On multivariate analysis, strong TG2 expression was a marginally significant prognostic indicator for Fuhrman nuclear grade and TNM staging (p=.054). Conclusions: Our study is the first to demonstrate the clinicopathologic significance of TG2 expression in a large number of human CCRCC samples. Strong TG2 expression was associated with high nuclear grade and poor prognosis.

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ALK-Positive Renal Cell Carcinoma in a Large Series of Consecutively Resected Korean Renal Cell Carcinoma Patients: Cheol Lee, Jeong Whan Park, Ja Hee Suh, Kyung Han Nam, Kyung Chul Moon; Korean J Pathol. 2013;47(5):452-457. Published online October 25, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.5.452

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Abstract PDF

Background

Recently, there have been a few reports of renal cell carcinoma (RCC) cases with anaplastic lymphoma kinase (ALK) gene fusion. In this study, we screened consecutively resected RCCs from a single institution for ALK protein expression by immunohistochemistry, and then we performed fluorescence in situ hybridization to confirm the ALK gene alteration in ALK immunohistochemistry-positive cases.

Methods

We screened 829 RCCs by ALK immunohistochemistry, and performed fluorescence in situ hybridization analysis using ALK dual-color break-apart rearrangement probe. Histological review and additional immunohistochemistry analyses were done in positive cases.

Results

One ALK-positive case was found. Initial diagnosis of this case was papillary RCC type 2. This comprises 0.12% of all RCCs (1/829) and 1.9% of papillary RCCs (1/53). This patient was a 44-year-old male with RCC found during routine health check-up. He was alive without evidence of disease 12 years after surgery. The tumor showed a papillary and tubular pattern, and showed positivity for CD10 (focal), epithelial membrane antigen, cytokeratin 7, pan-cytokeratin, PAX-2, and vimentin.

Conclusions

We found the first RCC case with ALK gene rearrangement in Korean patients by ALK immunohistochemistry among 829 RCCs. This case showed similar histological and immunohistochemical features to those of previous adult cases with ALK rearrangement, and showed relatively good prognosis.

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Histologic Variations and Immunohistochemical Features of Metastatic Clear Cell Renal Cell Carcinoma: Cheol Lee, Jeong-Whan Park, Ja Hee Suh, Kyung Han Nam, Kyung Chul Moon; Korean J Pathol. 2013;47(5):426-432. Published online October 25, 2013; DOI: https://doi.org/10.4132/KoreanJPathol.2013.47.5.426

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Abstract PDF

Background

Due to advancements in treatment of metastatic and advanced renal cell carcinoma (RCC), it has become increasingly important to diagnose metastatic RCC and the specific subtype. In this study, we investigated the diverse histologic features of metastatic clear cell renal cell carcinoma (CCRCC) cases in comparison with corresponding primary lesions.

Methods

We identified 119 metastatic CCRCC cases from 81 corresponding primary lesions diagnosed between 1995 and 2010 and evaluated the diverse histologic and immunohistochemical features of these lesions.

Results

A total of 44 primary lesions (54.3%) had a non-clear cell component in addition to a typical clear cell component. Of the 119 metastatic lesions, 63 lesions (52.9%) contained a non-clear cell component, and 29 metastatic lesions were composed of a non-clear cell component only. Rhabdoid features were the most frequent non-clear cell histology among the metastatic lesions. Metastatic CCRCCs mainly showed positive CD10 and epithelial membrane antigen staining and negative cytokeratin 7 staining.

Conclusions

Metastatic CCRCC commonly showed a variety of histologic features. If there is a difficulty to diagnose metastatic CCRCC due to a variety of histologic features or small biopsy specimen, histologic review of the primary lesion and immunohistochemical analysis can help determine the correct diagnosis.

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Clear Cell Papillary Renal Cell Carcinoma: A Report of 15 Cases Including Three Cases of Concurrent Other-Type Renal Cell Carcinomas: Jeong Hwan Park, Cheol Lee, Ja Hee Suh, Kyung Chul Moon; Korean J Pathol. 2012;46(6):541-547. Published online December 26, 2012; DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.6.541

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Abstract PDF

Background

Clear cell papillary renal cell carcinoma (CCPRCC) is a recently established subtype of renal epithelial tumor. The aim of this study was to identify the diagnostic criteria of CCPRCC with an emphasis on immunohistochemical studies, and to report three cases with concurrent other-type renal cell carcinoma (RCC).

Methods

A total of 515 RCC patients that consecutively underwent surgical resection at Seoul National University Hospital from 1 January 2010 to 31 December 2011 were screened. Each case was reviewed based on the histologic features and was evaluated immunohistochemically.

Results

A total of 15 CCPRCCs were identified, which composed 2.9% of the total RCCs. The mean age was 52 years, and the average tumor size was 1.65 cm. All 15 cases showed low nuclear grade, no lymph node metastasis and no distant metastasis. The CCPRCCs showed variable architectural patterns including cystic, trabecular, papillary, and acinar. All of the cases showed moderate to intense immunoreactivity for cytokeratin 7 (CK7). CD10 was negative or showed focal weak positivity. Three cases had concurrent other-type RCC, including a clear cell RCC and an acquired cystic disease-associated RCC.

Conclusions

The strong CK7 and negative or focal weak CD10 expression will be useful for the diagnosis of CCPRCC.

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ERG Immunohistochemistry and Clinicopathologic Characteristics in Korean Prostate Adenocarcinoma Patients: Ja Hee Suh, Jeong-Whan Park, Cheol Lee, Kyung Chul Moon; Korean J Pathol. 2012;46(5):423-428. Published online October 25, 2012; DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.5.423

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Abstract PDF

Background

Transmembrane protease serine 2-ETS related gene (TMPRSS2-ERG) gene fusion, the most common genetic alternation in prostate cancer, is associated with protein expression of the oncogene ERG. Recently, an immunohistochemical staining method using an anti-ERG antibody was shown to have a strong correlation with altered ERG protein expression.

Methods

We analyzed a total of 303 radical prostatectomy specimens (obtained from Korean prostate cancer cases) using a constructed tissue microarray and ERG immunohistochemical staining. Thereafter, we evaluated the association between ERG expression and clinicopathological factors.

Results

The ERG-positive rate was 24.4% (74/303) and significantly higher ERG expression was observed in the subgroup with a lower Gleason score (p=0.004). Analysis of the histologic pattern of prostate adenocarcinomas revealed that tumors with discrete glandular units (Gleason pattern 3) displayed higher frequency of ERG expression (p=0.016). The ERG-positive rate was lower than that found (approximately 50%) in studies involving western populations. Other factors including age, tumor volume, initial protein-specific antigen level, a pathological stage and margin status were not significantly related with the ERG expression.

Conclusions

ERG immunohistochemical staining is significantly higher in tumors with well-formed glands and is associated with a lower Gleason score.

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Cyclooxygenase-2 Expression and Its Prognostic Significance in Clear Cell Renal Cell Carcinoma: Ji Won Lee, Jeong Hwan Park, Ja Hee Suh, Kyung Han Nam, Ji-Young Choe, Hae Yoen Jung, Ji Yoen Chae, Kyung Chul Moon; Korean J Pathol. 2012;46(3):237-245. Published online June 22, 2012; DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.3.237

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Abstract PDF

Background

The prognostic value of cyclooxygenase-2 (COX-2) in human renal cell carcinoma (RCC) remains unclear. The purposes of this study are to elucidate the clinical significance of COX-2 in clear cell RCC (CCRCC) and to assess the treatment effect of COX-2 inhibition on CCRCC cell lines.

Methods

Using tumor samples obtained from 137 patients who had undergone nephrectomy at Seoul National University Hospital, we evaluated COX-2 expression on immunohistochemistry. Moreover, we performed the cell proliferation assay using 3-(4,5-dimethylthiazol-2yl)-2,5-diphenyl-2H tetrazolium bromide (MTT) and cell invasion assay. Thus, we evaluated the effect of meloxicam, an inhibitor of COX-2, in two human CCRCC cell lines.

Results

Cancer-specific survival (p=0.038) and progression-free survival (p=0.031) were shorter in the COX-2 high expression group. A multivariate logistic regression model showed that COX-2 expression was an independent risk factor for pTNM stage and Fuhrman nuclear grade. The MTT assay revealed that COX-2 inhibition led to the suppression of the proliferation of CCRCC cell lines. Moreover, it also reduced their invasion capacity.

Conclusions

This study postulates that COX-2 is a poor prognostic indicator in human CCRCC, suggesting that COX-2 inhibition can be a potential therapy in CCRCC.

Citations

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Amy B. Hont, Benoit Dumont, Kathryn S. Sutton, John Anderson, Alex Kentsis, Jarno Drost, Andrew L. Hong, Arnauld Verschuur
Pediatric Blood & Cancer.2023;[Epub] CrossRef
Free-fatty acid receptor-1 (FFA1/GPR40) promotes papillary RCC proliferation and tumor growth via Src/PI3K/AKT/NF-κB but suppresses migration by inhibition of EGFR, ERK1/2, STAT3 and EMT
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Flavonoids derived from Anemarrhenae Rhizoma ameliorate inflammation of benign prostatic hyperplasia via modulating COX/LOX pathways
Xiaotong Cao, Ying Shang, Weigui Kong, Shuqing Jiang, Jun Liao, Ronghua Dai
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Kirenol, darutoside and hesperidin contribute to the anti-inflammatory and analgesic activities of Siegesbeckia pubescens makino by inhibiting COX-2 expression and inflammatory cell infiltration
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COX-2 Expression in Renal Cell Carcinoma and Correlations with Tumor Grade, Stage and Patient Prognosis
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Practical Standardization in Renal Biopsy Reporting.: So Young Jin, Hyeon Joo Jeong, Sun Hee Sung, Beom Jin Lim, Jee Young Han, Soon Won Hong, Hyun Ee Yim, Yeong Jin Choi, Yong Mee Cho, Myoung Jae Kang, Kyung Chul Moon, Hee Jeong Cha, Seung Yeon Ha, Mi Seon Kang, Mee Young So, Kwang Sun Suh, Jong Eun Joo, Yong Jin Kim, Nam Hee Won, Moon Hyang Park; Korean J Pathol. 2010;44(6):613-622.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.6.613

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Abstract PDF

BACKGROUND
To standardize renal biopsy reporting and diagnosis, The Renal Pathology Study Group of the Korean Society of Pathologists (RPSKSP) has developed a renal pathology reporting format for the native and allograft kidney.
METHODS
A consensus checklist of a provisional renal biopsy format was sent to all members of the RPSKSP. Feed back opinions regarding the practical application of the checklist to the diagnostic work were received.
RESULTS
Kidney biopsies require three essential examinations: by light microscopy, immunofluorescence (IF), and electron microscopy (EM). A final report of a renal biopsy should include information on specimen adequacy and a description of the morphologic change using a systematic semiquantitative method for each of the compartments, with optional separate IF and EM reports.
CONCLUSIONS
A standard renal biopsy report format is important in establishing clinicopathologic correlations, making reliable prognostic considerations, comparing the findings in sequential biopsies and evaluating the effects of therapy.

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Additional antihypertensive effect of magnesium supplementation with an angiotensin II receptor blocker in hypomagnesemic rats
Kyubok Jin, Tae Hee Kim, Yeong Hoon Kim, Yang Wook Kim
The Korean Journal of Internal Medicine.2013; 28(2): 197. CrossRef
Clinicopathologic Features of IgA-Dominant Postinfectious Glomerulonephritis
Tai Yeon Koo, Gheun-Ho Kim, Hyang Park
Korean Journal of Pathology.2012; 46(2): 105. CrossRef

The Prognostic Implications of Cystic Change in Clear Cell Renal Cell Carcinoma.: Heae Surng Park, Eun Jung Jung, Jae Kyung Myung, Kyung Chul Moon; Korean J Pathol. 2010;44(2):149-154.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.2.149

4,991 View
83 Download
4 Crossref

Abstract PDF

BACKGROUND
Cystic renal cell carcinoma has been reported to have a good prognosis. However, previous studies included cases of multilocular cystic renal cell carcinoma, which has an excellent prognosis, and renal cell carcinoma with cystic necrosis, which has an adverse prognosis. Therefore, we analyzed the prognostic influence of cystic change in clear cell renal cell carcinoma after excluding those morphological features.
METHODS
We identified 225 patients with clear cell renal cell carcinoma who underwent nephrectomy between 2001 and 2003. The clinicopathologic features were compared with clinical outcomes.
RESULTS
Cystic change in clear cell renal cell carcinoma (n = 66) was significantly associated with younger patient age (< 55), smaller tumor size (< or = 4 cm), lower pT stage (pT1, T2), M0 stage at initial diagnosis, lower tumor, node, and metastasis stage (I, II), and lower nuclear grade (1, 2). Patients with cystic change in clear cell renal cell carcinoma had significantly longer cancer-specific (p = 0.015) and progression-free survival (p = 0.004) than those without cystic change, by univariate analysis. Multivariate analysis revealed that cystic change significantly decreased the risk of cancer progression (risk ratio, 0.27; 95% confidence interval, 0.11 to 0.69).
CONCLUSIONS
In patients with clear cell renal cell carcinoma, cystic change is a good independent predictor for survival.

Citations

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