Journal of Pathology and Translational Medicine

Original Articles

Loss of Nuclear BAP1 Expression Is Associated with High WHO/ISUP Grade in Clear Cell Renal Cell Carcinoma: Young Chan Wi, Ahrim Moon, Min Jung Jung, Yeseul Kim, Seong Sik Bang, Kiseok Jang, Seung Sam Paik, Su-Jin Shin; J Pathol Transl Med. 2018;52(6):378-385. Published online October 1, 2018; DOI: https://doi.org/10.4132/jptm.2018.09.21

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Background
BRCA1-associated protein 1 (BAP1) mutations are frequently reported in clear cell renal cell carcinoma (ccRCC); however, very few studies have evaluated the role of these mutations in other renal cell carcinoma (RCC) subtypes. Therefore, we analyzed BAP1 protein expression using immunohistochemistry in several RCC subtypes and assessed its relationship with clinicopathological characteristics of patients.
Methods
BAP1 expression was immunohistochemically evaluated in tissue microarray blocks constructed from 371 samples of RCC collected from two medical institutions. BAP1 expression was evaluated based on the extent of nuclear staining in tumor cells, and no expression or expression in < 10% of tumor cells was defined as negative.
Results
Loss of BAP1 expression was observed in ccRCC (56/300, 18.7%), chromophobe RCC (6/26, 23.1%), and clear cell papillary RCC (1/4, 25%), while we failed to detect BAP1 expression loss in papillary RCC, acquired cystic disease-associated RCC, or collecting duct carcinoma. In ccRCC, loss of BAP1 expression was significantly associated with high World Health Organization (WHO)/International Society of Urological Pathology (ISUP) grade (p = .002); however, no significant correlation was observed between loss of BAP1 expression and survival in ccRCC. Loss of BAP1 expression showed no association with prognostic factors in chromophobe RCC.
Conclusions
Loss of BAP1 nuclear expression was observed in both ccRCC and chromophobe RCC. In addition, BAP1 expression loss was associated with poor prognostic factors such as high WHO/ISUP grade in ccRCC.

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Clinical and Genomic Features of Patients with Renal Cell Carcinoma and Advanced Chronic Kidney Disease: Analysis of a Multi-Institutional Database
Corbin J. Eule, Junxiao Hu, Dale Hedges, Alkesh Jani, Thomas Pshak, Brandon J. Manley, Alejandro Sanchez, Robert Dreicer, Zin W. Myint, Yousef Zakharia, Elaine T. Lam
Cancers.2024; 16(10): 1920. CrossRef
Immune regulation and prognosis indicating ability of a newly constructed multi-genes containing signature in clear cell renal cell carcinoma
Ziwei Gui, Juan Du, Nan Wu, Ningning Shen, Zhiqing Yang, Huijun Yang, Xuzhi Wang, Na Zhao, Zixin Zeng, Rong Wei, Wenxia Ma, Chen Wang
BMC Cancer.2023;[Epub] CrossRef
Radiogenomic Associations Clear Cell Renal Cell Carcinoma: An Exploratory Study
Derek H Liu, Komal A Dani, Sharath S Reddy, Xiaomeng Lei, Natalie L Demirjian, Darryl H Hwang, Bino A Varghese, Suhn Kyong Rhie, Felix Y. Yap, David I. Quinn, Imran Siddiqi, Manju Aron, Ulka Vaishampayan, Haris Zahoor, Steven Y Cen, Inderbir S Gill, Vinay
Oncology.2023; 101(6): 375. CrossRef
Immunohistochemistry for the diagnosis of renal epithelial neoplasms
Mahmut Akgul, Sean R Williamson
Seminars in Diagnostic Pathology.2022; 39(1): 1. CrossRef
BRCA1-Associated Protein 1 (BAP-1) as a Prognostic and Predictive Biomarker in Clear Cell Renal Cell Carcinoma: A Systematic Review
Shuchi Gulati, Melissa Previtera, Primo N. Lara
Kidney Cancer.2022; 6(1): 23. CrossRef
Renal Cell Carcinoma in End-Stage Renal Disease: A Review and Update
Ziad M. El-Zaatari, Luan D. Truong
Biomedicines.2022; 10(3): 657. CrossRef
CD117, BAP1, MTAP, and TdT Is a Useful Immunohistochemical Panel to Distinguish Thymoma from Thymic Carcinoma
Mounika Angirekula, Sindy Y Chang, Sarah M. Jenkins, Patricia T. Greipp, William R. Sukov, Randolph S. Marks, Kenneth R. Olivier, Stephen D. Cassivi, Anja C Roden
Cancers.2022; 14(9): 2299. CrossRef
BAP1 in cancer: epigenetic stability and genome integrity
Sabrina Caporali, Alessio Butera, Ivano Amelio
Discover Oncology.2022;[Epub] CrossRef
Bioinformatic analysis identifying FGF1 gene as a new prognostic indicator in clear cell Renal Cell Carcinoma
Xiaoqin Zhang, Ziyue Wang, Zixin Zeng, Ningning Shen, Bin Wang, Yaping Zhang, Honghong Shen, Wei Lu, Rong Wei, Wenxia Ma, Chen Wang
Cancer Cell International.2021;[Epub] CrossRef
Identification of Four Pathological Stage-Relevant Genes in Association with Progression and Prognosis in Clear Cell Renal Cell Carcinoma by Integrated Bioinformatics Analysis
Dengyong Xu, Yuzi Xu, Yiming Lv, Fei Wu, Yunlong Liu, Ming Zhu, Dake Chen, Bingjun Bai
BioMed Research International.2020; 2020: 1. CrossRef
Functional characterisation guides classification of novel BAP1 germline variants
Jing Han Hong, Siao Ting Chong, Po-Hsien Lee, Jing Tan, Hong Lee Heng, Nur Diana Binte Ishak, Sock Hoai Chan, Bin Tean Teh, Joanne Ngeow
npj Genomic Medicine.2020;[Epub] CrossRef
Tissue-Based Immunohistochemical Markers for Diagnosis and Classification of Renal Cell Carcinoma
Liang G Qu, Vaisnavi Thirugnanasundralingam, Damien Bolton, Antonio Finelli, Nathan Lawrentschuk
Société Internationale d’Urologie Journal.2020; 1(1): 68. CrossRef
Radiogenomics: bridging imaging and genomics
Zuhir Bodalal, Stefano Trebeschi, Thi Dan Linh Nguyen-Kim, Winnie Schats, Regina Beets-Tan
Abdominal Radiology.2019; 44(6): 1960. CrossRef

The Smad4/PTEN Expression Pattern Predicts Clinical Outcomes in Colorectal Adenocarcinoma: Yumin Chung, Young Chan Wi, Yeseul Kim, Seong Sik Bang, Jung-Ho Yang, Kiseok Jang, Kyueng-Whan Min, Seung Sam Paik; J Pathol Transl Med. 2018;52(1):37-44. Published online October 23, 2017; DOI: https://doi.org/10.4132/jptm.2017.10.20

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Abstract PDF Supplementary Material

Background
Smad4 and PTEN are prognostic indicators for various tumor types. Smad4 regulates tumor suppression, whereas PTEN inhibits cell proliferation. We analyzed and compared the performance of Smad4 and PTEN for predicting the prognosis of patients with colorectal adenocarcinoma.
Methods
Combined expression patterns based on Smad4+/– and PTEN+/– status were evaluated by immunostaining using a tissue microarray of colorectal adenocarcinoma. The relationships between the protein expression and clinicopathological variables were analyzed.
Results
Smad4–/PTEN– status was most frequently observed in metastatic adenocarcinoma, followed by primary adenocarcinoma and tubular adenoma (p<.001). When Smad4–/PTEN– and Smad4+/PTEN+ groups were compared, Smad4–/PTEN– status was associated with high N stage (p=.018) and defective mismatch repair proteins (p=.006). Significant differences in diseasefree survival and overall survival were observed among the three groups (Smad4+/PTEN+, Smad4–/PTEN+ or Smad4+/PTEN–, and Smad4–/PTEN–) (all p<.05).
Conclusions
Concurrent loss of Smad4 and PTEN may lead to more aggressive disease and poor prognosis in patients with colorectal adenocarcinoma compared to the loss of Smad4 or PTEN alone.

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Association between the expression of epithelial–mesenchymal transition (EMT)-related markers and oncologic outcomes of colorectal cancer
Mona Hany Emile, Sameh Hany Emile, Amr Awad El-Karef, Mohamed Awad Ebrahim, Ibrahim Eldosoky Mohammed, Dina Abdallah Ibrahim
Updates in Surgery.2024;[Epub] CrossRef
The Potential Role of Genomic Signature in Stage II Relapsed Colorectal Cancer (CRC) Patients: A Mono-Institutional Study
Michela Roberto, Giulia Arrivi, Emanuela Pilozzi, Andrea Montori, Genoveffa Balducci, Paolo Mercantini, Andrea Laghi, Debora Ierinò, Martina Panebianco, Daniele Marinelli, Silverio Tomao, Paolo Marchetti, Federica Mazzuca
Cancer Management and Research.2022; Volume 14: 1353. CrossRef
Alterations of PTEN and SMAD4 methylation in diagnosis of breast cancer: implications of methyl II PCR assay
Menha Swellam, Entsar A. Saad, Shimaa Sabry, Adel Denewer, Camelia Abdel Malak, Amr Abouzid
Journal of Genetic Engineering and Biotechnology.2021; 19(1): 54. CrossRef
E3 ubiquitin ligase HECW1 promotes the metastasis of non-small cell lung cancer cells through mediating the ubiquitination of Smad4
Chen Lu, Guangyao Ning, Panpan Si, Chunsheng Zhang, Wenjian Liu, Wei Ge, Kai Cui, Renquan Zhang, Shenglin Ge
Biochemistry and Cell Biology.2021; 99(5): 675. CrossRef
Computational quantification of global effects induced by mutations and drugs in signaling networks of colorectal cancer cells
Sara Sommariva, Giacomo Caviglia, Silvia Ravera, Francesco Frassoni, Federico Benvenuto, Lorenzo Tortolina, Nicoletta Castagnino, Silvio Parodi, Michele Piana
Scientific Reports.2021;[Epub] CrossRef
Clinicopathological characterization of SMAD4-mutated intestinal adenocarcinomas: A case-control study
Xiaoyan Liao, Yansheng Hao, Xiaofei Zhang, Stephen Ward, Jane Houldsworth, Alexandros D. Polydorides, Noam Harpaz, Aldo Scarpa
PLOS ONE.2019; 14(2): e0212142. CrossRef
Clinicopathological Characterization and Prognostic Implication of SMAD4 Expression in Colorectal Carcinoma
Seung-Yeon Yoo, Ji-Ae Lee, Yunjoo Shin, Nam-Yun Cho, Jeong Mo Bae, Gyeong Hoon Kang
Journal of Pathology and Translational Medicine.2019; 53(5): 289. CrossRef
Dissecting the therapeutic implications of the complex SMAD4 regulatory network in metastatic colorectal cancer
Ion Cristóbal, Blanca Torrejón, Andrea Santos, Melani Luque, Marta Sanz-Alvarez, Federico Rojo, Jesús García-Foncillas
European Journal of Surgical Oncology.2018; 44(8): 1283. CrossRef
Reply to: Dissecting the therapeutic implications of the complex SMAD4 regulatory network in metastatic colorectal cancer
Jordan M. Cloyd, Takashi Mizuno, Jean-Nicolas Vauthey
European Journal of Surgical Oncology.2018; 44(8): 1285. CrossRef

Clinicopathologic Correlations of E-cadherin and Prrx-1 Expression Loss in Hepatocellular Carcinoma: Kijong Yi, Hyunsung Kim, Yumin Chung, Hyein Ahn, Jongmin Sim, Young Chan Wi, Ju Yeon Pyo, Young-Soo Song, Seung Sam Paik, Young-Ha Oh; J Pathol Transl Med. 2016;50(5):327-336. Published online August 31, 2016; DOI: https://doi.org/10.4132/jptm.2016.06.22

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Abstract PDF

Background
Developing predictive markers for hepatocellular carcinoma (HCC) is important, because many patients experience recurrence and metastasis. Epithelial to mesenchymal transition (EMT) is a developmental process that plays an important role during embryogenesis and also during cancer metastasis. Paired-related homeobox protein 1 (Prrx-1) is an EMT inducer that has recently been introduced, and its prognostic significance in HCC is largely unknown.
Methods
Tissue microarray was constructed using surgically resected primary HCCs from 244 cases. Immunohistochemical staining of E-cadherin and Prrx-1 was performed. The correlation between E-cadherin loss and Prrx-1 expression, as well as other clinicopathologic factors, was evaluated.
Results
E-cadherin expression was decreased in 96 cases (39.4%). Loss of E-cadherin correlated with a higher recurrence rate (p < .001) but was not correlated with patient’s survival. Thirty-two cases (13.3%) showed at least focal nuclear Prrx-1 immunoreactivity while all non-neoplastic livers (n = 22) were negative. Prrx-1 expression was not associated with E-cadherin loss, survival or recurrence rates, pathologic factors, or the Ki-67 labeling index. Twenty tumors that were positive for E-cadherin and Prrx-1 had significantly higher nuclear grades than the rest of the cohort (p = .037). In Cox proportional hazard models, E-cadherin loss and large vessel invasion were independent prognostic factors for shorter disease-free survival. Cirrhosis and high Ki-67 index (> 40%) were independent prognostic factors for shorter overall survival.
Conclusions
Prrx-1 was expressed in small portions of HCCs but not in normal livers. Additional studies with a large number of Prrx-1-positive cases are required to confirm the results of this study.

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The Prognostic Importance of Ki-67 in Gastrointestinal Carcinomas: A Meta-analysis and Multi-omics Approach
Mahdieh Razmi, Fatemeh Tajik, Farideh Hashemi, Ayna Yazdanpanah, Fatemeh Hashemi-Niasari, Adeleh Divsalar
Journal of Gastrointestinal Cancer.2024; 55(2): 599. CrossRef
Homotypic cell-in-cell structures as an adverse prognostic predictor of hepatocellular carcinoma
Ruizhi Wang, Yichao Zhu, Hao Zhong, Xinyue Gao, Qiang Sun, Meifang He
Frontiers in Oncology.2022;[Epub] CrossRef
Dysregulated paired related homeobox 1 impacts on hepatocellular carcinoma phenotypes
Weronika Piorońska, Zeribe Chike Nwosu, Mei Han, Michael Büttner, Matthias Philip Ebert, Steven Dooley, Christoph Meyer
BMC Cancer.2021;[Epub] CrossRef

Brief Case Report

Lymphoepithelioma-like Carcinoma of the Renal Pelvis: A Case Report and Review of the Literature: Hyein Ahn, Jongmin Sim, Hyunsung Kim, Kijong Yi, Hulin Han, Yumin Chung, Abdul Rehman, Seung Sam Paik; Korean J Pathol. 2014;48(6):458-461. Published online December 31, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.6.458

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Analysis of genetic profiling, pathomics signature, and prognostic features of primary lymphoepithelioma‐like carcinoma of the renal pelvis
Bo Fan, Yuanbin Huang, Hongshuo Zhang, Tingyu Chen, Shenghua Tao, Xiaogang Wang, Shuang Wen, Honglong Wang, Zhe Lin, Tianqing Liu, Hongxian Zhang, Tao He, Xiancheng Li
Molecular Oncology.2022; 16(20): 3666. CrossRef
Lymphoepithelioma-like carcinoma of the upper urinary tract: A systematic review of case reports
Shi-Cong Lai, Samuel Seery, Wei Zhang, Ming Liu, Guan Zhang, Jian-Ye Wang
World Journal of Clinical Cases.2020; 8(4): 771. CrossRef
Rare primary lymphoepithelioma-like carcinoma of the renal pelvis
Shi-Cong Lai, Samuel Seery, Tong-Xiang Diao, Jian-Ye Wang, Ming Liu
World Journal of Clinical Cases.2020; 8(9): 1752. CrossRef
Eight-year follow-up of locally advanced lymphoepithelioma-like carcinoma at upper urinary tract: A case report
Che H Yang, Wei C Weng, Yi S Lin, Li H Huang, Chin H Lu, Chao Y Hsu, Yen C Ou, Min C Tung
World Journal of Clinical Cases.2020; 8(19): 4505. CrossRef
Lymphoepithelioma-like, a variant of urothelial carcinoma of the urinary bladder: a case report and systematic review for optimal treatment modality for disease-free survival
Andy W. Yang, Aydin Pooli, Subodh M. Lele, Ina W. Kim, Judson D. Davies, Chad A. LaGrange
BMC Urology.2017;[Epub] CrossRef

Case Report

Castleman's Disease of the Renal Sinus Presenting as a Urothelial Malignancy: A Brief Case Report: Se Min Jang, Hulin Han, Ki-Seok Jang, Young Jin Jun, Tchun Yong Lee, Seung Sam Paik; Korean J Pathol. 2012;46(5):503-506. Published online October 25, 2012; DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.5.503

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Abstract PDF

Castleman's disease is a rare benign lymphoproliferative disorder that frequently affects lymph nodes of the mediastinal thorax and the neck. It very rarely affects the renal sinus. We report a case of Castleman's disease arising in the renal sinus in a 64-year-old man. The patient visited the hospital with the chief complaint of hematuria. Abdominal computed tomography revealed a homogeneous mass in the sinus of the left kidney, radiologically interpreted as a malignant urothelial tumor. Subsequently, nephroureterectomy was performed, after which microscopic examination of the specimen revealed a diffuse lymphoproliferative lesion with reactive lymphoid follicles of various sizes and prominent plasma cell infiltration of interfollicular spaces, highlighted by immunohistochemical staining for CD138. The lesion was diagnosed as Castleman's disease of the plasma cell type. Although preoperative diagnosis of Castleman's disease is difficult and the incidence is exceedingly rare, it should be considered in the differential diagnosis of renal sinus tumors.

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Misdiagnosis of renal pelvic unicentric Castleman disease: a case report
Dian Fu, Bo Yang, Ming Yang, Zhenyu Xu, Wen Cheng, Zhijia Liu, Liming Zhang, Zhiguo Mao, Cheng Xue
Frontiers in Surgery.2023;[Epub] CrossRef
Case report: Castleman’s disease involving the renal sinus resembling renal cell carcinoma
Enlong Zhang, Yuan Li, Ning Lang
Frontiers in Surgery.2022;[Epub] CrossRef
Radiologic features of Castleman’s disease involving the renal sinus: A case report and review of the literature
Xiao-Wan Guo, Xu-Dong Jia, Shan-Shan Shen, Hong Ji, Ying-Min Chen, Qian Du, Shu-Qian Zhang
World Journal of Clinical Cases.2019; 7(8): 1001. CrossRef
Castleman’s Disease: a Suprarenal Surprise!
Praveen Sundar, Priyank Bijalwan, Ginil Kumar Pooleri
Indian Journal of Surgical Oncology.2018; 9(2): 254. CrossRef

Original Article

Type and Incidence of Soft Tissue Sarcomas in Korea: 2001-2007.: Kyung Un Choi, Hae Youn Kang, Heasoo Koo, Mi Seon Kwon, Dong Hoon Kim, Mi Jung Kim, Su Jin Kim, Young Sill Kim, Chul Hwan Kim, Yong Koo Park, Hye Rim Park, Seung Sam Paik, Jin Young Yoo, Anhi Lee, Jae Hyuk Lee, Hyekyung Lee, Kyu Yun Jang, Young Chae Chu, Joon Hyuk Choi; Korean J Pathol. 2011;45(6):557-563.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.6.557

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Abstract PDF

BACKGROUND
The Korean Bone and Soft Tissue Pathology Study Group of the Korean Society of Pathologists conducted a nationwide retrospective analysis of soft tissue sarcoma (STS) to provide the clinicopathologic characteristics of STS within the population of the Republic of Korea.
METHODS
The cases of STS were collected during a 7-year period (2001-2007) from 19 institutes in Korea. All cases were classified according to the histologic criteria proposed by the World Health Organization. Clinicopathologic data were reviewed.
RESULTS
Data from 722 patients (median age, 50 years) were collected. Data showed a slight male predominance. The most frequent types of STS in decreasing order were liposarcoma, malignant fibrous histiocytoma, leiomyosarcoma, and synovial sarcoma. STS occurred throughout the body, although approximately half (47.8%) were located in the extremities. The majority of STS was histologically classified as high grade with a large tumor size (>5 cm). The overall survival rate for the patients was 76.3% (median follow-up time, 26 months; range, 1 to 89 months). Histologic grade, tumor size, American Joint Committee on Cancer stage, tumor site, and resection status were prognostic. Significant independent adverse prognostic factors were large tumor size (>5 cm) and tumor site other than extremities.
CONCLUSIONS
We reported the distribution and characteristics of STS in the Republic of Korea.

Citations

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Distribution and survival of primary sarcoma in Korea: A single center analysis of 2017 cases
Sung Jun Jo, Kyeong Sik Kim, Kyo Won Lee, Jae Berm Park, Yoon-La Choi, Jeong Il Yu, Su Jin Lee, Dong Il Choi, Sung Joo Kim
Korean Journal of Clinical Oncology.2018; 14(1): 30. CrossRef

Case Reports

Parotid Gland Carcinosarcoma with Osteosarcoma as a Sarcomatous Component: A Case Report with Fine Needle Aspiration Cytologic Findings.: Se Min Jang, Young Jin Jun, Hulin Han, Ki Seok Jang, Seung Sam Paik; Korean J Pathol. 2011;45(4):412-416.; DOI: https://doi.org/10.4132/KoreanJPathol.2011.45.4.412

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Abstract PDF

Carcinosarcoma of the salivary glands is a rare malignant tumor showing both malignant epithelial and mesenchymal components. Herein, we present a carcinosarcoma of the parotid gland in a 67-year-old man consisting of osteosarcoma and adenocarcinoma components with fine needle aspiration cytological findings. The tumor was composed predominantly of osteosarcoma and small areas of adenocarcinomatous components and a hyalinized nodule reminiscent of pleomorphic adenoma. The tumor showed infiltrative growth features with perineural, lymphatic, and vascular invasion. Despite postoperative adjuvant radiation therapy, multiple metastatic lesions occurred in the both lungs 5 months after surgery. As salivary gland carcinosarcoma has been known to demonstrate highly aggressive behavior, an accurate pathological diagnosis is prerequisite for appropriate treatment.

Citations

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Clinical and Morphological Aspects of Aggressive Salivary Gland Mixed Tumors: A Narrative Review
Alexandra Corina Faur, Alina Maria Șișu, Laura Andreea Ghenciu, Roxana Iacob, Emil Robert Stoicescu, Ovidiu Alin Hațegan, Mărioara Cornianu
Diagnostics.2024; 14(17): 1942. CrossRef
Carcinosarcoma of the parotid gland with abdominal metastasis: a case report and review of literature
Chang Gok Woo, Seung-Myoung Son
World Journal of Surgical Oncology.2018;[Epub] CrossRef

A Case of Gastric Carcinosarcoma with Neuroendocrine and Smooth Muscle Differentiation.: Se Min Jang, Si Hyong Jang, Kyueng Whan Min, Woong Na, Young Jin Jun, Seung Sam Paik; Korean J Pathol. 2010;44(1):87-91.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.1.87

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Abstract PDF

Carcinosarcoma of the stomach is a rarely occurring malignant biphasic tumor that consists of both carcinomatous and sarcomatous components simultaneously in a single tumor. The common carcinoma component is tubular or papillary adenocarcinoma and the mesenchymal sarcomatous components are variable and these include leiomyosarcoma, rhabdomyosarcoma, osteosarcoma and chondrosarcoma. However, neuroendocrine carcinomatous differentiation in the carcinomatous component is extremely rare. We present here a rare gastric carcinosarcoma that demonstrated neuroendocrine carcinomatous and leiomyosarcomatous differentiation in a 47-year-old man.

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Asymptomatic giant gastric carcinosarcoma
Hitesh Sarda, Anshuman Pandey, Abhishek Gatuam, Hareesh Shanthappa Nellikoppad
BMJ Case Reports.2023; 16(10): e255680. CrossRef
Carcinosarcoma of Stomach Confined to the Mucosa
Hirohiko Kuroda, Hiroaki Saito, Yusuke Kono, Yuki Murakami, Yuji Shishido, Tomoyuki Matsunaga, Yoji Fukumoto, Tomohiro Osaki, Keigo Ashida, Kanae Nosaka, Yoshihisa Umekita, Yoshiyuki Fujiwara
Yonago Acta Medica.2017; 60(4): 246. CrossRef
A Rare Case of Gastric Carcinosarcoma with Neuroendocrine Differentiation
Hae Jin Shin, Jong Seok Ju, Hee Seok Moon, Sun Hyung Kang, Jae Kyu Sung, Hyun Yong Jeong, Kyu Sang Song
The Korean Journal of Helicobacter and Upper Gastrointestinal Research.2014; 14(2): 121. CrossRef
Gastric Sarcomatoid Carcinoma
Fabio Carboni, Giovanni Battista Levi Sandri, Mario Valle, Renato Covello, Alfredo Garofalo
Journal of Gastrointestinal Surgery.2013; 17(11): 2025. CrossRef
Gastric carcinosarcoma: A case report and review of the literature
ROBERTO CIROCCHI, STEFANO TRASTULLI, JACOPO DESIDERIO, VERONICA GRASSI, IVAN BARILLARO, ALBERTO SANTORO, CARLO BOSELLI, NICOLA AVENIA, GIUSEPPE NOYA, ANGELO DE SOL
Oncology Letters.2012; 4(1): 53. CrossRef

Fibrous Pseudotumor of the Testicular Tunics: Two case reports.: Seung Sam Paik, Nam Hoon Kim, Young Hyeh Ko, Moon Hyang Park; Korean J Pathol. 1995;29(4):533-535.

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Abstract PDF: Fibrous pseudotumor of the testicular tunics is a rare benign fibrous proliferative disorder, but it is the second most common mass-forining lesion of the testicular tunics. While these lesions are not strict neoplasms, they do form nodules and are often mistaken for neoplasms. Herein, we report 2 cases of fibrous pseudotumor with characteristic histologic findings. Both cases had been incidentally found as slow growing scrotal masses and underwent excision. There were several nodules along the testicular tunics which had bulging whitish-gray cut surface with focal myxoid change and a whorling appearance. These two cases showed the histologic spectrum seen in fibrous pseudotumor from a haphazard arrangement of fibroblastic type cells with intervening collagen and focal lymphocytic infiltrates in case 1, to a densely collagenized lesion in case 2.

Original Article

Inflammatory Pseudotumor of the Urinary Bladder: An Immunohistochemical and Ultrastructural Study.: Seung Sam Paik, Joo Seob Keum, Moon Hyang Park, Jung Dal Park; Korean J Pathol. 1996;30(5):447-452.

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Abstract PDF: Inflammatory pseudotumor of the urinary bladder is an unusual, benign mesenchymal proliferative lesion of the submucosal stroma easily mistaken for a malignant neoplasm clinically and histologically. We present a case and describe the clinical presentation and radiologic, histologic, histochemical, immunohistochemical, and ultrastructural findings. A 23-year old patient presented with sudden onset of gross painless hematuria for 3 months. There was no previous instrumentation or surgery involving the genitourinary tract. Cystoscopy revealed a large polypoid and ulcerated bladder mass. The lesion consisted of plump spindle shaped, fibroblast-like cells embedded in a myxoid stroma. Mitotic figures were negligible and the lesion showed encroachment on the superficial muscle bundles. The spindle cells were immunoreactive for vimentin and muscle specific actin. Immunohistochemical and ultrastructural findings revealed the fibroblastic-myofibroblastic nature of this lesion. Complete surgical excision by partial cystectomy was successful in eradicating the lesion. The findings are described with a discussion of the pathogenesis and review of the literature.

Case Reports

Idiopathic Entero-colic Lymphocytic Phlebitis: A case report.: Seung Sam Paik, Young Ha Oh, Eun Kyung Hong, Jung Dal Lee; Korean J Pathol. 1996;30(6):533-538.

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Abstract PDF: Localized enterocolic lymphocytic phlebitis is characterized by selective phlebitis involving the small to medium-sized veins and venules, infiltration exclusively by lymphocytes, and no other systemic vasculitis or inflammatory bowel disease. This vasculitis can be a rare cause of intestinal ischemia. We experienced a case of enterocolic lymphocytic phlebitis in a 72-year-old woman, who presented with abdominal pain and distension. The resected colon and terminal ileum showed striking lymphocytic phlebitis affecting the veins and venules of the bowel and mesentery which resulted in ischemic injury of the bowel. This vasculopathy was the only demonstrable cause of ischemia. Arteritis and arteriolitis was not found. There is no clinical or laboratory evidence or a history of extraintestinal vasculitis. The etiology of this clinicopathological entity has not been elucidated. Herein, we report the clinicopathological findings in this patient who presented with ischemic intestinal necrosis caused by localized intestinal lymphocytic phlebitis associated with thrombosis.

Malignant Rhabdoid Tumor of the Kidney: A report of two cases: An immunohistochemical and ultrastructural study.: Seung Sam Paik, Moon Hyang Park; Korean J Pathol. 1996;30(8):706-714.

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Abstract PDF: Malignant rhabdoid tumor of the kidney(MRTK), an uncommon renal tumor found in children, is one of the most lethal neoplasms of early life. It was first recognized during a review of the first National Wilms' Tumor Study(NWTS) as an extremely aggressive neoplasm whose appearance often mimicks those of skeletal muscle tumors, but without histological, immunohistochemical, and ultrastructural markers of rhabdomyogenesis. Herein we present two cases of malignant rhabdoid tumor of the kidney, one occurring in a 6-month-old male baby, and the other in a 123-month-old girl. They presented a huge tender mass on the left upper quadrant of the abdomen. Microscopically, each case was very cellular and composed of sheets of round or polygonal cells with ample cytoplasm often containing eosinophilic filamentous inclusions and round vesicular nuclei with prominent nucleoli. Case 1 showed lymphomatoid pattern, but case 2 showed foci of several variant patterns associated with classic appearances. The tumor cells showed a strong reactivity for vimentin in both cases. Unusually, case 2 showed focal reactivity for epithelial membrane antigen(EMA), muscle specific actin, and smooth muscle actin. Ultrastructural study confirmed the presence of whorled bundles of intermediate filaments in paranuclear position, and a prominent nucleolus.

Ureteral Fibroepithelial Polyp: A report of four cases (One case with nephrogenic adenoma).: Won Mee Lee, Seung Sam Paik, Eun Kyung Hong, Moon Hyang Park, Jung Dal Lee; Korean J Pathol. 1996;30(8):715-720.

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Abstract PDF: Fibroepithelial polyps of the ureter are usually acquired rather than congenital. Most polyps are hamartomatous growths which tend to arise in the proximal portion of the left ureter. Most patients exibit either hematuria or persistent flank pain secondary to partial ureteral obstruction. Because of false positivity of urine cytology, as well as intravenous pyelogram, the correct diagnosis is confused with malignancy. Herein we report four cases of ureteral fibroepithelial polyp, which are associated with stones resulting in partial obstruction of the ureter. One of the four cases is associated with nephrogenic adenoma in the lamina propria of the adjacent ureter. The following report describes clinicopathologic findings of fibroepithelial polyp with review of literatures.

Inflammatory Myofibroblastic Tumor in Posterior Mediastinum.: Seung Sam Paik, Seok Hoon Jeon, Se Jin Jang, Moon Hyang Park, Jung Dal Lee; Korean J Pathol. 1997;31(1):63-67.

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Abstract PDF: Inflammatory myofibroblastic tumor(IMT) or inflammatory pseudotumor is a rare, solid tumor that most often affects children. This tumor is characterized by a spindle cell proliferation admixed with a variety of inflammatory cells. Although it has disputed nosology, a distinctive fibroinflammatory and even pseudosarcomatous appearance have been well appreciated. Herein, we report a case of IMT in the posterior mediastinum in a 19-year-old girl with clinical findings. The immunohistochemical and ultrastructural studies on the tumor cells are reported, and their distinctive characteristics are discussed in details.

Original Article

Clear Cell Islet Cell Tumor of the Pancreas: An Immunohistochemical and Ultrastructural study.: Seung Sam Paik, Young Ha Oh, Eun Kyung Hong, Moon Hyang Park, Jung Dal Lee; Korean J Pathol. 1997;31(2):162-166.

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Abstract PDF: A clear cell islet cell tumor of the pancreas is extremely rare and characterized by extensive clear cell components. Electron microscopic and immunohistochemical findings are essential to prove that the mass with clear cells is an unusual manifestation of an islet cell tumor. Herein, we report a case of clear cell islet cell tumor of a 54-year-old woman with abdominal pain. The tumor was composed of polygonal clear cells arranged in nests, trabeculae, and ribbon pattern with the extensively fibrous stroma. These tumor cells showed strong reactivity for chromogranin and weak reactivity for somatostatin and glucagon. An electron microscope revealed that the important contributing factor of the clear cytoplasmic change was mainly due to an accumulation of lipid droplets, coupled with cytoplasmic swelling in some areas. Some tumor cells showed many endosecretory granules ranging from 111 to 297nm in diameter. In the clinical and immunohistochemical findings these granules were consistent with somatostatin granules in morphology and size.

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