Journal of Pathology and Translational Medicine

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A standardized pathology report for gastric cancer: 2nd edition: Young Soo Park, Myeong-Cherl Kook, Baek-hui Kim, Hye Seung Lee, Dong-Wook Kang, Mi-Jin Gu, Ok Ran Shin, Younghee Choi, Wonae Lee, Hyunki Kim, In Hye Song, Kyoung-Mee Kim, Hee Sung Kim, Guhyun Kang, Do Youn Park, So-Young Jin, Joon Mee Kim, Yoon Jung Choi, Hee Kyung Chang, Soomin Ahn, Mee Soo Chang, Song-Hee Han, Yoonjin Kwak, An Na Seo, Sung Hak Lee, Mee-Yon Cho; J Pathol Transl Med. 2023;57(1):1-27. Published online January 15, 2023; DOI: https://doi.org/10.4132/jptm.2022.12.23

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The first edition of ‘A Standardized Pathology Report for Gastric Cancer’ was initiated by the Gastrointestinal Pathology Study Group of the Korean Society of Pathologists and published 17 years ago. Since then, significant advances have been made in the pathologic diagnosis, molecular genetics, and management of gastric cancer (GC). To reflect those changes, a committee for publishing a second edition of the report was formed within the Gastrointestinal Pathology Study Group of the Korean Society of Pathologists. This second edition consists of two parts: standard data elements and conditional data elements. The standard data elements contain the basic pathologic findings and items necessary to predict the prognosis of GC patients, and they are adequate for routine surgical pathology service. Other diagnostic and prognostic factors relevant to adjuvant therapy, including molecular biomarkers, are classified as conditional data elements to allow each pathologist to selectively choose items appropriate to the environment in their institution. We trust that the standardized pathology report will be helpful for GC diagnosis and facilitate large-scale multidisciplinary collaborative studies.

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Genomic and Transcriptomic Characterization of Gastric Cancer with Bone Metastasis
Sujin Oh, Soo Kyung Nam, Keun-Wook Lee, Hye Seung Lee, Yujun Park, Yoonjin Kwak, Kyu Sang Lee, Ji-Won Kim, Jin Won Kim, Minsu Kang, Young Suk Park, Sang-Hoon Ahn, Yun-Suhk Suh, Do Joong Park, Hyung Ho Kim
Cancer Research and Treatment.2024; 56(1): 219. CrossRef
Microscopic tumor mapping of post-neoadjuvant therapy pancreatic cancer specimens to predict post-surgical recurrence: A prospective cohort study
Yeshong Park, Yeon Bi Han, Jinju Kim, MeeYoung Kang, Boram Lee, Eun Sung Ahn, Saemi Han, Haeryoung Kim, Hee-Young Na, Ho-Seong Han, Yoo-Seok Yoon
Pancreatology.2024; 24(4): 562. CrossRef
Effect of Neoadjuvant Chemotherapy on Tumor-Infiltrating Lymphocytes in Resectable Gastric Cancer: Analysis from a Western Academic Center
Elliott J. Yee, Danielle Gilbert, Jeffrey Kaplan, Sachin Wani, Sunnie S. Kim, Martin D. McCarter, Camille L. Stewart
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Interpretation of PD-L1 expression in gastric cancer: summary of a consensus meeting of Korean gastrointestinal pathologists
Soomin Ahn, Yoonjin Kwak, Gui Young Kwon, Kyoung-Mee Kim, Moonsik Kim, Hyunki Kim, Young Soo Park, Hyeon Jeong Oh, Kyoungyul Lee, Sung Hak Lee, Hye Seung Lee
Journal of Pathology and Translational Medicine.2024; 58(3): 103. CrossRef
Expression of claudin 18.2 in poorly cohesive carcinoma and its association with clinicopathologic parameters in East Asian patients
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Pathological Interpretation of Gastric Tumors in Endoscopic Submucosal Dissection
Jung Yeon Kim
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Histopathology of Gastric Cancer
Baek-hui Kim, Sung Hak Lee
The Korean Journal of Helicobacter and Upper Gastrointestinal Research.2023; 23(2): 143. CrossRef
Endoscopic submucosal dissection hands-on training with artificial mucosal layer EndoGEL
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Standardization of the pathologic diagnosis of appendiceal mucinous neoplasms: Dong-Wook Kang, Baek-hui Kim, Joon Mee Kim, Jihun Kim, Hee Jin Chang, Mee Soo Chang, Jin-Hee Sohn, Mee-Yon Cho, So-Young Jin, Hee Kyung Chang, Hye Seung Han, Jung Yeon Kim, Hee Sung Kim, Do Youn Park, Ha Young Park, So Jeong Lee, Wonae Lee, Hye Seung Lee, Yoo Na Kang, Younghee Choi; J Pathol Transl Med. 2021;55(4):247-264. Published online July 8, 2021; DOI: https://doi.org/10.4132/jptm.2021.05.28

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Abstract PDF Supplementary Material

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

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

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Abstract PDF Supplementary Material

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

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

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Abstract PDF

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

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Original Articles

Differential Features of Microsatellite-Unstable Colorectal Carcinomas Depending on EPCAM Expression Status: Jung Ho Kim, Jeong Mo Bae, Kyung-Ju Kim, Ye-Young Rhee, Younghoon Kim, Nam-Yun Cho, Hye Seung Lee, Mee Soo Chang, Gyeong Hoon Kang; Korean J Pathol. 2014;48(4):276-282. Published online August 26, 2014; DOI: https://doi.org/10.4132/KoreanJPathol.2014.48.4.276

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Abstract PDF

Background

Recent studies have revealed that a small subset of Lynch syndrome-associated colorectal carcinomas (CRCs) is caused by a germline EPCAM deletion-induced MSH2 epimutation. Based on the finding of this genetic alteration, we investigated the implications of EPCAM expression changes in microsatellite instability-high (MSI-H) CRCs.

Methods

Expression of EPCAM and DNA mismatch repair proteins was assessed by immunohistochemistry in 168 MSI-H CRCs. Using DNA samples of these tumors, MLH1 promoter methylation status was also determined by methylation-specific real-time polymerase chain reaction method (MethyLight).

Results

Among 168 MSI-H CRCs, complete loss (CL) and focal loss (FL) of EPCAM expression was observed in two (1.2%) and 22 (13.1%) cases, respectively. Both of the EPCAM-CL cases were found in MSH2-negative tumors without MLH1 promoter methylation. However, only nine of the 22 EPCAM-FL tumors had MSH2 deficiency. Of the 22 EPCAM-FL tumors, 13 showed MLH1 loss, and among them, nine cases were determined to have MLH1 methylation. EPCAM-FL was significantly associated with advanced stage (p=.043), distant metastasis (p=.003), poor differentiation (p=.001), and signet ring cell component (p=.004).

Conclusions

Loss of EPCAM expression is differentially associated with clinicopathological and molecular features, depending on the completeness of the loss, in MSI-H CRCs.

Citations

Citations to this article as recorded by

Unraveling the multifaceted role of EpCAM in colorectal cancer: an integrated review of its function and interplay with non-coding RNAs
Xingyu Jiang, Sumeng Wang, Qi Liang, Yiqian Liu, Lingxiang Liu
Medical Oncology.2023;[Epub] CrossRef
Outcomes of Definitive Treatment of Signet Ring Cell Carcinoma of the Rectum: Is Minimal Invasive Surgery Detrimental in Signet Ring Rectal Cancers?
S. Raghavan, Deepak Kumar Singh, J. Rohila, A. DeSouza, R. Engineer, A. Ramaswamy, V. Ostwal, A. Saklani
Indian Journal of Surgical Oncology.2020; 11(4): 597. CrossRef
Evaluation of the Role of Circulating Tumor Cells and Microsatellite Instability Status in Predicting Outcome of Advanced CRC Patients
Ippokratis Messaritakis, Maria Sfakianaki, Konstantinos Vogiatzoglou, Asimina Koulouridi, Chara Koutoulaki, Dimitrios Mavroudis, Maria Tzardi, Nikolaos Gouvas, John Tsiaoussis, John Souglakos
Journal of Personalized Medicine.2020; 10(4): 235. CrossRef
Is Ep-CAM Expression a Diagnostic and Prognostic Biomarker for Colorectal Cancer? A Systematic Meta-Analysis
Susu Han, Shaoqi Zong, Qi Shi, Hongjia Li, Shanshan Liu, Wei Yang, Wen Li, Fenggang Hou
EBioMedicine.2017; 20: 61. CrossRef
Prognostic factors in sporadic colon cancer with high-level microsatellite instability
Bo Young Oh, Jung Wook Huh, Yoon Ah Park, Yong Beom Cho, Seong Hyeon Yun, Hee Cheol Kim, Woo Yong Lee, Ho-Kyung Chun
Surgery.2016; 159(5): 1372. CrossRef
Clinical significance of fibroblast growth factor receptor 2 expression in patients with residual rectal cancer after preoperative chemoradiotherapy: relationship with KRAS or BRAF mutations and MSI status
Ghilsuk Yoon, Hwayoung Lee, Jae-Hoon Kim, Keun Hur, An Na Seo
Tumor Biology.2016; 37(8): 10209. CrossRef
Subcellular differential expression of Ep-ICD in oral dysplasia and cancer is associated with disease progression and prognosis
Raj Thani Somasundaram, Jatinder Kaur, Iona Leong, Christina MacMillan, Ian J. Witterick, Paul G. Walfish, Ranju Ralhan
BMC Cancer.2016;[Epub] CrossRef
BRAF, PIK3CA, and HER2 Oncogenic Alterations According to KRAS Mutation Status in Advanced Colorectal Cancers with Distant Metastasis
Soo Kyung Nam, Sumi Yun, Jiwon Koh, Yoonjin Kwak, An Na Seo, Kyoung Un Park, Duck-Woo Kim, Sung-Bum Kang, Woo Ho Kim, Hye Seung Lee, Wayne A Phillips
PLOS ONE.2016; 11(3): e0151865. CrossRef
Twist1-induced epithelial-mesenchymal transition according to microsatellite instability status in colon cancer cells
Bo Young Oh, So-Young Kim, Yeo Song Lee, Hye Kyung Hong, Tae Won Kim, Seok Hyung Kim, Woo Yong Lee, Yong Beom Cho
Oncotarget.2016; 7(35): 57066. CrossRef
Clinicopathologic, molecular, and prognostic implications of the loss of EPCAM expression in colorectal carcinoma
Jung Ho Kim, Jeong Mo Bae, Young Seok Song, Nam-Yun Cho, Hye Seung Lee, Gyeong Hoon Kang
Oncotarget.2016; 7(12): 13372. CrossRef
Pathologic Factors Associated with Prognosis after Adjuvant Chemotherapy in Stage II/III Microsatellite-Unstable Colorectal Cancers
Jung Ho Kim, Jeong Mo Bae, Hyeon Jeong Oh, Hye Seung Lee, Gyeong Hoon Kang
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HER3 protein expression in relation to HER2 positivity in patients with primary colorectal cancer: clinical relevance and prognostic value
An Na Seo, Yoonjin Kwak, Woo Ho Kim, Duck-Woo Kim, Sung-Bum Kang, Gheeyoung Choe, Hye Seung Lee
Virchows Archiv.2015; 466(6): 645. CrossRef
Clinical and prognostic value of MET gene copy number gain and chromosome 7 polysomy in primary colorectal cancer patients
An Na Seo, Kyoung Un Park, Gheeyoung Choe, Woo Ho Kim, Duck-Woo Kim, Sung-Bum Kang, Hye Seung Lee
Tumor Biology.2015; 36(12): 9813. CrossRef
c-MYC Copy-Number Gain Is an Independent Prognostic Factor in Patients with Colorectal Cancer
Kyu Sang Lee, Yoonjin Kwak, Kyung Han Nam, Duck-Woo Kim, Sung-Bum Kang, Gheeyoung Choe, Woo Ho Kim, Hye Seung Lee, Andreas Krieg
PLOS ONE.2015; 10(10): e0139727. CrossRef
Nuclear Ep-ICD accumulation predicts aggressive clinical course in early stage breast cancer patients
Gunjan Srivastava, Jasmeet Assi, Lawrence Kashat, Ajay Matta, Martin Chang, Paul G Walfish, Ranju Ralhan
BMC Cancer.2014;[Epub] CrossRef

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

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Abstract PDF

Background

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

Methods

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

Results

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

Conclusions

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

Citations

Citations to this article as recorded by

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

Expression of P-glycoprotein and Apoptosis in Diffuse Large B-cell Lymphoma.: Ji Eun Kim, Young A Kim, Mee Soo Chang, Yunkyeong Jeon, JinHo Paik, Seon Og Yoon; Korean J Pathol. 2009;43(4):317-320.; DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.4.317

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Abstract PDF: BACKGROUND
Diffuse large B-cell lymphoma (DLBCL) is the most common type of malignant lymphoma which responds well to conventional chemotherapy. However, quite a few patients have a recurrence with more aggressive forms after completion of therapy. Multidrug resistance proteins (MRP) are related to this process in several ways such as cell cycle alteration and modulation of apoptosis. METHODS: We investigated the expression of P-glycoprotein (Gp), one of the well-known MRP, as well as apoptosis associated proteins in DLBCL. Immunohistochemical staining for Gp, p53, Bcl-2, Ki-67, active caspase 3 and FADD was done in forty DLBCL cases. The association between MRP and apoptosis associated proteins to clinical findings was also tested. RESULTS: Twenty-nine patients out of 40 (73%) with DLBCL were positive for Gp, and 26 cases (65%) had a strong positive for Gp. Gp expression was stronger in high-grade lesions than in low-grade lesions and was associated to Bcl-2 expression. However, we could not find an adverse impact of Gp expression on patients' overall survival or relapse free survival rate. CONCLUSIONS: Our study revealed a high frequency of expression for Gp in DLBCL with a possible relationship between the expressions of Gp to apoptosis associated proteins.

Experimental Study on Shark Liver Oil-Induced Lipoid Pneumonia in Rats.: Mee Soo Chang, Eui Keun Ham; Korean J Pathol. 1997;31(8):711-722.

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Abstract PDF: The purpose of this experiment is to evaluate the histopathologic findings of shark liver oil-induced lipoid pneumonia, and to determine whether shark liver oil is absorbed through lymphatics and the venous system or not. A single intratracheal administration of shark liver oil (0.6 ml/kg of B.W.) was given to Sprague-Dawley rats. They were then sacrificed sequentially from 1 hour to 12 weeks after injection. We investigated the chest radiographic findings, the serum total lipid concentration of blood obtained by cardiac puncture, lipid-laden alveolar macrophage index of the bronchoalveolar lavage fluid, and the histopathology of tracheobronchial lymph nodes and the lung (Oil red O stain & H&E stain). Chest radiographs showed no specific findings; ill-defined hazy, linear, small patch radioopacity, air space consolidation or collapse. Thirty-six percent of the experimental rats revealed normal findings. Within the lung, the shark liver oil appeared either as highly emulsified fine granules in the cytoplasm of the alveolar macrophage or as free, round oil masses. The area of the lung accumulated with lipid material was maximized 1 week after injection, and then decreased thereafter. The tissue reactions were cuboidal metaplasia of the alveolar lining, widening and lymphocytic infiltration of the alveolar septa and granuloma formation (3% of experimental rats) as a reaction to a foreign body. There were also lung abscesses due to superimposed bacterial infection (5% of experimental rats). With time after the injection of the oil, the serum total lipid tended to increase and the intracellular lipid of the alveolar macrophages in the bronchoalveolar lavage fluid tended to decrease. In summary, the histopathologic findings of the lung in the experimental lipoid pneumonia were interstitial chronic inflammation and granulomas with the presence of lipoid material in the lung parenchyma, and shark liver oil appeared to be absorbed in the blood and the lymph, then metabolized.

Gastrointestinal Polyposis in Koreans: A Nationwide Survey of Clinicopathologic Analysis of 112 Surgically Resected Cases.: Mee Soo Chang, Hoguen Kim, Woo Ho Kim, Chan Il Park, Eun Kyung Hong, Han Kyeom Kim, In Soo Suh, Byung Kee Kim, Ja June Jang, Woon Sub Han, Hyung Sik Shin, So Young Jin, Dae Young Kang, Yong Il Kim; Korean J Pathol. 1998;32(6):404-412.

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Abstract: Gastrointestinal polyposis (GIP) is a rare disease characterized by formation of the numerous polyps in the gastrointestinal tract and presenting several extraintestinal manifestations. Most of the diseases are transmitted in an autosomal dominant pattern. In Korea, the epidemiological study as well as the pathological analysis of the GIP is not well established. We therefore analysed 38 items of GIP using surgically resected specimens. The materials in this study were collected from the 12 institutions and case reports in Korean literature between 1980 and 1991. The clinicopathologic findings were reevaluated by several members of the study group for gastrointestinal pathology. The results are as follows: (1) A total of 112 cases were included in this study: 83 cases were collected from 12 institutions and 29 cases were collected from Korean literature. The cases were classified as familial adenomatous polyposis (FAP), 59 cases; Gardner's syndrome, 3 cases; juvenile polyposis, 12 cases; Peutz-Jeghers syndrome, 35 cases; multiple colonic adenomas, 3 cases. (2) Among 59 cases of FAP, the range of age at operation was 14 to 61 years, and a family history was positive in 25 cases. The number of polyps in colorectum was 100~8,000. Of the 37 cases in which the examination of polyp density was available, 16 cases (43%) showed the highest density in the rectum and the sigmoid colon. The carcinomatous change within polyp(s) was present in 18 cases (31%), and associated advanced single or multiple colonic carcinomas existed in 37 cases (63%). Twenty-six (45%) tumors out of total 58 carcinomas were in the rectum. Twenty-five patients were evaluated for the upper gastrointestinal lesions, and 11 patients (44%) had pathologic lesions; multiple fundic gland polyps in 3 cases (12%), gastric and duodenal adenomas in 2 cases (8%), gastric adenomas in 2 cases (8%), duodenal adenomas in 2 cases (8%), gastric carcinoma and adenoma in 1 case (4%), gastric carcinoma in 1 case (4%). (3) Among 3 cases of Gardner's syndrome, the range of age at operation was 25 to 31 years, a family history was identified in 2 cases. One case was associated with an advanced colonic carcinoma and carcinomatous change within polyp. Extra gastrointestinal lesions were sebaceous cyst, epidermal cyst, osteoma and desmoid tumor. (4) Among 12 juvenile polyposis, the range of age at operation was 8 to 51 years and 5 patients had a family history. The carcinomatous change within polyp was found in 2 cases (17%) and associated advanced colonic carcinoma was in 4 cases (33%). The associated different type of polyps was tubular adenomas in 9 cases (75%), hyperplastic polyps in 4 cases (33%) and villous adenomas in 2 cases (17%). (5) Among 35 Peutz-Jeghers syndrome, the range of age at first operation was 6 to 42 years, family history was positive in 11 cases. The carcinomatous change within polyp was found in 1 case (3%), and associated advanced colonic carcinoma in 1 case (3%). The epithelial misplacement was observed in 4 cases (11%), and tubular or villous adenomatous feature in 4 cases (11%). In summary, the most frequent GIP for the surgical resection in Korea is FAP and the FAP is associated with high incidence of coexisting advanced and intramucosal carcinomas. Hamartomatous polyposis syndromes, such as juvenile polyposis and Peutz-Jeghers syndrome are another frequent disease for the surgical resection and are also associated with an increased risk of cancer.

Pathologic Analysis of 2159 Cases of Appendix.: Chan Sik Park, Mee Soo Chang, In Ae Park, Yong Il Kim, Gheeyoung Choe; Korean J Pathol. 2000;34(1):39-49.

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Abstract PDF: We reviewed 2159 consecutive cases of surgically resected appendices. The appendectomy specimen consisted of 91 cases of acute focal appendicitis (5.4%), 926 cases of acute suppurative appendicitis (55.1%), 228 cases of acute gangrenous appendicitis (13.6%), 63 cases of periappendicitis (3.8%), 13 cases of pure fibrous obliteration of the lumen (FOL; 0.8%), 18 cases of other diseases (7 mucoceles, 2 mucinous cystic neoplasms, 4 carcinoids, 2 metastatic carcinomas, 2 tuberculous appendicitides, and 1 eosinophilic appendicitis; 1%), and 342 cases with no diagnostic abnormality (20.3%). Patients having acute appendicitis ranged from 3 to 84 years of age, and patients in their 10's and 20's occupied over half of 2159 cases. Diagnostic accuracy of the acute appendicitis was 79.7%. Incidence of the acute appendicitis was suspected to be 7.2/100,000/year. Twenty eight cases of acute appendicitis were associated with diverticula. In the former acute primary diverticulitis led to acute appendicitis in 14 of 28 cases. Among 478 incidental appendectomy cases, there were 3 acute focal appendicitides, 1 acute suppurative appendicitis, 1 eosinophilic appendicitis, 32 periappendicitides, 1 mucocele, 40 pure FOLs, 1 deciduosis, 1 endometriosis, and 1 diverticulosis without inflammation. There were 69 cases of FOL (32 complete forms and 37 incomplete forms), among which 13 cases were associated with acute appendicitis. FOL was more frequent in female patients as well as patients over 40 years of age. Incomplete FOL was considered to progress to complete form with age. The incidence of appendiceal diverticula was higher, whereas the incidences of carcinoid tumor and FOL were lower compared with that in the western report. In 14 of 28 cases the appendiceal diverticulum was the site in which acute appendicitis began.

Does the Colorectal Cancer Among Koreans Share the Same Pathological Features by Geographical Distribution: A Nationwide Survey of Surgically Resected 1,676 Cancers from 1,602 Patients.: Mee Soo Chang, Jin Hee Sohn, Dae Young Kang, Gyeong Hoon Kang, Myung Sook Kim, Woo Ho Kim, Jong Hee Nam, Woo Sung Moon, Sun Hoo Park, Cheol Jeun Park, Ro hyun Sung, Young Lyun Oh, Eun Sook Chang, Hee Kyung Chang, Mee Yon Cho, Kyung Ja Cho, Yong Il Kim; Korean J Pathol. 2001;35(1):14-19.

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Abstract PDF: BACKGROUND
This nationwide survey was undertaken to characterize the general pathological features of colorectal cancer in Korea, and especially to elucidate the geographical characteristics by means of their anatomical distribution.
METHODS
We analysed 1,676 colorectal cancers (from 1,602 patients) surgically resected in 1998 at 15 institutions from nine geographical sites in Korea.
RESULTS
The topographic incidence of colorectal cancer in seven out of the total nine geographical sites, was the highest in the rectum (32-54%); and those from Wonju and Cheongju were in the sigmoid colon (28% for both). The right colon cancer incidence was 42% in Wonju and 36% in Cheongju, while it was 17-22% in the other areas. The cecal cancer incidences in Wonju and in Taegu were 7% and 8%, respectively, but 0-4% in the other areas. As for histology, moderately differentiated adenocarcinoma was the most frequent (46-84%), except for in Wonju and Chonju, where the most predominant type was well differentiated (63% and 52%, respectively).
CONCLUSION
The incidence of right colon cancer was higher in Wonju and Cheongju, than in the other geographical sites. The cecal predilection was prominent in Taegu and Wonju. The Elucidation of geographical differences in degree of differentiation for tubular adenocarcinoma seems to require further cumulative study with strict guidelines.

Case Report

Fine Needle Aspiration Cytology of Osteoclast-like Giant Cell Tumor of the Liver: A Case Report .: Chan Sik Park, Ji Eun Kim, Mee Soo Chang; Korean J Cytopathol. 1999;10(1):79-84.

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Abstract PDF: Osteoclast-like giant cell tumor of the liver is an extremely rare malignancy with poor prognosis. To our knowledge, 5 cases have been reported in English literatures, but there was no report about fine needle aspiration cytologic(FNAC) features. We experienced a case of osteoclast-like giant cell tumor of the liver obtained by computed tomography(CT)-guided FNAC and needle biopsy. The cytologic findings mimicked giant cell tumor of the bone. A large hepatic mass of the left lobe with abdominal wall invasion was found by CT in a 46-year-old female complaining of epigastric pain. The FNAC showed moderately cellular smears consisting of osteoclast-like giant cells and mononuclear cells, which were individually scattered or intermingled in clusters. The osteoclast-like giant cells had abundant cytoplasms and multiple small round nuclei with fine chromatin and distinct nucleoli. The mononuclear cells had moderate amount of cytoplasm and relatively bland-looking oval nuclei with single small nucleoli. All of the cytologic features recapitulated the histologic findings of bland-looking osteoclast-like multinucleated giant cells evenly dispersed throughout the background of mononuclear cell. The immunohistochemical study showed positive reaction for CD68 and vimentin, but negative for cytokeratin in both osteoclast-like giant cells and mononuclear cells.

Multicenter Study

Porposal for Creating a Guideline for Cancer Registration of the Gastrointestinal Tumors (I).: Mee Yon Cho, Yun Kyung Kang, Kyoung Mee Kim, Hee Kyung Chang, Hee Jin Chang, Mee Soo Chang, Joon Mee Kim, Dae Young Kang, Chanil Park, Jin Hee Sohn; Korean J Pathol. 2008;42(3):140-150.

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Abstract PDF: BACKGROUND
Cancer registries are fundamental for cancer control and multicenter collaborative research. However, there have been discrepancies among pathologists in classifying cancer and assigning the codes according to the International Classification of Disease Oncology 3 (ICD-O3). To improve the quality of cancer registries as well as to prevent the conflict with medical insurance compensation, a guideline for the coding of cancer is mandatory.
METHODS
AND RESULTS: Funded by the Management Center for Health Promotion, 40 members of the Gastrointestinal Pathology Study Group and the Cancer Registration Committee of the Korean Society of Pathologists participated in the 1st workshop for gastrointestinal tumor registration. The subjects of gastric epithelial tumor, intramucosal carcinoma of the colon, carcinoid tumor, gastrointestinal stromal tumor and appendiceal mucinous tumor were discussed to create a guideline. A survey to obtain consensus for the guideline proposed by the workshop was carried out by the members of the Korean Society of Pathologists and 240 members completed the questionnaire.
CONCLUSION
Although there are some issues to be discussed further, such as coding of high grade dysplasia/adenoma and intramucosal carcinoma of stomach and colon, the members agreed upon most parts of the proposed guideline. Therefore, we suggest using the ICD-O3 coding guideline for gastrointestinal tumor.

Original Article

A Standardized Pathology Report for Colorectal Cancer.: Hee Jin Chang, Cheol Keun Park, Woo Ho Kim, Young Bae Kim, Youn Wha Kim, Ho Guen Kim, Han Ik Bae, Kyu Sang Song, Mee Soo Chang, Hee Kyung Chang, Yang Seok Chae; Korean J Pathol. 2006;40(3):193-203.

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Abstract PDF: BACKGROUND
AND METHODS: For standardizing the pathology report and diagnosis of colorectal cancers, the Gastrointestinal Pathology Study Group of the Korean Society of Pathologists has developed a pathology reporting format for colorectal cancer in collaboration with the Korean Society of Coloproctology.
RESULTS
The diagnostic parameters are divided into two parts: the standard part and the optional part. The standard part contains most of the items listed in the Japanese classification, the TNM classification by AJCC, and the WHO classification. We included detailed descriptions on each item.
CONCLUSIONS
The standardized pathology report for colorectal cancers is adequate for its application to routine surgical pathology reports, and it is also helpful to decrease the discrepancies that occur during the pathologic diagnosis of colorectal cancer. Furthermore, this reporting format could encourage nationwide multi-center collaborative studies.

Case Report

Bednar Tumor: A case report with discusion of histogenesis.: Mee Soo Chang, Kye Yong Song; Korean J Pathol. 1993;27(6):659-662.

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Abstract PDF: The authors examined a case of Bednar tumor(pigmented dermatofibrosarcoma protuberans). A 35-year-old woman presented with protruding black back mass 3x2.5 cm in surface dimension and 1 cm in heigh, which has grown slowly for 30 years. Microscopically the lesion is characterized by spindle cells arranged in storiform pattern and admixed with melanin containing dendritic cells. Ultrastructural study revealed three cell populations: (1) cells resembling fibroblasts, (2) cells resembling perineural cells, and (3) melanocytes. The immunohistochemical study using S-100 protein alpha-1 antitrypsin, antichymotrypsin and EMA revealed negative reaction in spindle fibroblastic tumor cells. The histogenesis of this neoplasm remains controversial; neuroectoderm, perineural cell, fibroblast and histiocyte. Through the ultrastructural study and immunohistochemical study, the authors suggested that Bedner tumor arises form the neuroectoderm with bidirectional to perineural and fibroblastic differentiation.

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