Journal of Pathology and Translational Medicine

Reviews

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
Cancers.2024; 16(7): 1428. CrossRef
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
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Expression of claudin 18.2 in poorly cohesive carcinoma and its association with clinicopathologic parameters in East Asian patients
Moonsik Kim, Byung Woog Kang, Jihyun Park, Jin Ho Baek, Jong Gwang Kim
Pathology - Research and Practice.2024; 263: 155628. CrossRef
Pathological Interpretation of Gastric Tumors in Endoscopic Submucosal Dissection
Jung Yeon Kim
Journal of Digestive Cancer Research.2023; 11(1): 15. CrossRef
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
Tae-Se Kim, Jun Haeng Lee
Journal of Innovative Medical Technology.2023; 1(1): 5. CrossRef

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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Uncovering the Hidden Threat: Ileocolic Intussusception in an Adult With Appendicular Tumor
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Primary and secondary tumors of the peritoneum: key imaging features and differential diagnosis with surgical and pathological correlation
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Muzinöse Tumoren des Peritoneums
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Marian Constantin, Cristina Mătanie, Livia Petrescu, Alexandra Bolocan, Octavian Andronic, Coralia Bleotu, Mihaela Magdalena Mitache, Sorin Tudorache, Corneliu Ovidiu Vrancianu
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Original Article

A scoring system for the diagnosis of non-alcoholic steatohepatitis from liver biopsy: Kyoungbun Lee, Eun Sun Jung, Eunsil Yu, Yun Kyung Kang, Mee-Yon Cho, Joon Mee Kim, Woo Sung Moon, Jin Sook Jeong, Cheol Keun Park, Jae-Bok Park, Dae Young Kang, Jin Hee Sohn, So-Young Jin; J Pathol Transl Med. 2020;54(3):228-236. Published online April 15, 2020; DOI: https://doi.org/10.4132/jptm.2020.03.07

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Abstract PDF

Background
Liver biopsy is the essential method to diagnose non-alcoholic steatohepatitis (NASH), but histological features of NASH are too subjective to achieve reproducible diagnoses in early stages of disease. We aimed to identify the key histological features of NASH and devise a scoring model for diagnosis.
Methods
Thirteen pathologists blindly assessed 12 histological factors and final histological diagnoses (‘not-NASH,’ ‘borderline,’ and ‘NASH’) of 31 liver biopsies that were diagnosed as non-alcoholic fatty liver disease (NAFLD) or NASH before and after consensus. The main histological parameters to diagnose NASH were selected based on histological diagnoses and the diagnostic accuracy and agreement of 12 scoring models were compared for final diagnosis and the NAFLD Activity Score (NAS) system.
Results
Inter-observer agreement of final diagnosis was fair (κ = 0.25) before consensus and slightly improved after consensus (κ = 0.33). Steatosis at more than 5% was the essential parameter for diagnosis. Major diagnostic factors for diagnosis were fibrosis except 1C grade and presence of ballooned cells. Minor diagnostic factors were lobular inflammation ( ≥ 2 foci/ × 200 field), microgranuloma, and glycogenated nuclei. All 12 models showed higher inter-observer agreement rates than NAS and post-consensus diagnosis (κ = 0.52–0.69 vs. 0.33). Considering the reproducibility of factors and practicability of the model, summation of the scores of major (× 2) and minor factors may be used for the practical diagnosis of NASH.
Conclusions
A scoring system for the diagnosis of NAFLD would be helpful as guidelines for pathologists and clinicians by improving the reproducibility of histological diagnosis of NAFLD.

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Changes in indications for outpatient percutaneous liver biopsy over 5 years: from hepatitis C to fatty liver disease
Marlone Cunha-Silva, Luíza D. Torres, Mariana F. Fernandes, Tirzah de M. Lopes Secundo, Marina C.G. Moreira, Ademar Yamanaka, Leonardo T. Monici, Larissa B. Eloy da Costa, Daniel F. Mazo, Tiago Sevá-Pereira
Gastroenterología y Hepatología (English Edition).2022; 45(8): 579. CrossRef

Review

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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Original Articles

Current Cytology Practices in Korea: A Nationwide Survey by the Korean Society for Cytopathology: Eun Ji Oh, Chan Kwon Jung, Dong-Hoon Kim, Han Kyeom Kim, Wan Seop Kim, So-Young Jin, Hye Kyoung Yoon; J Pathol Transl Med. 2017;51(6):579-587. Published online September 27, 2017; DOI: https://doi.org/10.4132/jptm.2017.08.11

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Abstract PDF

Background
Limited data are available on the current status of cytology practices in Korea. This nationwide study presents Korean cytology statistics from 2015.
Methods
A nationwide survey was conducted in 2016 as a part of the mandatory quality-control program by the Korean Society for Cytopathology. The questionnaire was sent to 208 medical institutions performing cytopathologic examinations in Korea. Individual institutions were asked to submit their annual cytology statistical reports and gynecologic cytology-histology correlation data for 2015.
Results
Responses were obtained from 206 medical institutions including 83 university hospitals, 87 general hospitals, and 36 commercial laboratories. A total of 8,284,952 cytologic examinations were performed in 2015, primarily in commercial laboratories (74.9%). The most common cytology specimens were gynecologic samples (81.3%). Conventional smears and liquid-based cytology were performed in 6,190,526 (74.7%) and 2,094,426 (25.3%) cases, respectively. The overall diagnostic concordance rate between cytologic and histologic diagnoses of uterine cervical samples was 70.5%. Discordant cases were classified into three categories: category A (minimal clinical impact, 17.4%), category B (moderate clinical impact, 10.2%), and category C (major clinical impact, 1.9%). The ratio of atypical squamous cells of undetermined significance to squamous intraepithelial lesion was 1.6 in university hospitals, 2.9 in general hospitals, and 4.9 in commercial laboratories.
Conclusions
This survey reveals the current status and trend of cytology practices in Korea. The results of this study can serve as basic data for the establishment of nationwide cytopathology policies and quality improvement guidelines in Korean medical institutions.

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Comparison of Unsatisfactory Samples from Conventional Smear versus Liquid-Based Cytology in Uterine Cervical Cancer Screening Test: Hoiseon Jeong, Sung Ran Hong, Seoung-Wan Chae, So-Young Jin, Hye Kyoung Yoon, Juhie Lee, Eun Kyung Kim, Sook Tai Ha, Sung Nam Kim, Eun-Jung Park, Jong Jae Jung, Sun Hee Sung, Sung-chul Lim; J Pathol Transl Med. 2017;51(3):314-319. Published online April 17, 2017; DOI: https://doi.org/10.4132/jptm.2017.03.17

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Abstract PDF

Background
Cervical cytology for uterine cervical cancer screening has transitioned from conventional smear (CS) to liquid-based cytology (LBC), which has many advantages. The aim of this study was to compare the proportion of unsatisfactory specimens from CS versus LBC at multiple institutions including general hospitals and commercial laboratories.
Methods
Each participating institution provided a minimum of 500 Papanicolaou (Pap) test results for analysis. Pap tests were classified according to the participating institution (commercial laboratory or general hospital) and the processing method (CS, ThinPrep, SurePath, or CellPrep). The causes of unsatisfactory results were classified as technical problems, scant cellularity, or complete obscuring factors.
Results
A total of 38,956 Pap test results from eight general hospitals and three commercial laboratories were analyzed. The mean unsatisfactory rate of LBC was significantly lower than that of CS (1.26% and 3.31%, p = .018). In the LBC method, samples from general hospitals had lower unsatisfactory rates than those from commercial laboratories (0.65% vs 2.89%, p = .006). The reasons for unsatisfactory results were heterogeneous in CS. On the other hand, 66.2% of unsatisfactory results in LBC were due to the scant cellularity.
Conclusions
Unsatisfactory rate of cervical cancer screening test results varies according to the institution and the processing method. LBC has a significantly lower unsatisfactory rate than CS.

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Interobserver Agreement on Pathologic Features of Liver Biopsy Tissue in Patients with Nonalcoholic Fatty Liver Disease: Eun Sun Jung, Kyoungbun Lee, Eunsil Yu, Yun Kyung Kang, Mee-Yon Cho, Joon Mee Kim, Woo Sung Moon, Jin Sook Jeong, Cheol Keun Park, Jae-Bok Park, Dae Young Kang, Jin Hee Sohn, So-Young Jin; J Pathol Transl Med. 2016;50(3):190-196. Published online April 18, 2016; DOI: https://doi.org/10.4132/jptm.2016.03.01

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Abstract PDF

Background
The histomorphologic criteria for the pathological features of liver tissue from patients with non-alcoholic fatty liver disease (NAFLD) remain subjective, causing confusion among pathologists and clinicians. In this report, we studied interobserver agreement of NAFLD pathologic features and analyzed causes of disagreement.
Methods
Thirty-one cases of clinicopathologically diagnosed NAFLD from 10 hospitals were selected. One hematoxylin and eosin and one Masson’s trichrome-stained virtual slide from each case were blindly reviewed with regard to 12 histological parameters by 13 pathologists in a gastrointestinal study group of the Korean Society of Pathologists. After the first review, we analyzed the causes of disagreement and defined detailed morphological criteria. The glass slides from each case were reviewed a second time after a consensus meeting. The degree of interobserver agreement was determined by multi-rater kappa statistics.
Results
Kappa values of the first review ranged from 0.0091–0.7618. Acidophilic bodies (k = 0.7618) and portal inflammation (k = 0.5914) showed high levels of agreement, whereas microgranuloma (k = 0.0984) and microvesicular fatty change (k = 0.0091) showed low levels of agreement. After the second review, the kappa values of the four major pathological features increased from 0.3830 to 0.5638 for steatosis grade, from 0.1398 to 0.2815 for lobular inflammation, from 0.1923 to 0.3362 for ballooning degeneration, and from 0.3303 to 0.4664 for fibrosis.
Conclusions
More detailed histomorphological criteria must be defined for correct diagnosis and high interobserver agreement of NAFLD.

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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.

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Update on the Proposal for Creating a Guideline for Cancer Registration of the Gastrointestinal Tumors (I-2): Eun Sun Jung, Yun Kyung Kang, Mee-Yon Cho, Joon Mee Kim, Won Ae Lee, Hee Eun Lee, Sunhoo Park, Jin Hee Sohn, So-Young Jin; Korean J Pathol. 2012;46(5):443-453. Published online October 25, 2012; DOI: https://doi.org/10.4132/KoreanJPathol.2012.46.5.443

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Abstract PDF

Background

Cancer registries play a fundamental role in cancer control and multicenter collaborative research. Recently, the need for reassessment of cancer registry criteria has arisen due to the newly released 2010 World Health Organization (WHO) classification. Accordingly, development of new coding guidelines for cancer is necessary to improve the quality of cancer registries, as well as to prevent conflicts that may arise when seeking medical insurance compensation.

Methods

With funding from the Management Center for Health Promotion, 35 members of the Gastrointestinal Pathology Study Group and the Cancer Registration Committee of the Korean Society of Pathologists (KSP) participated in a second workshop for gastrointestinal tumor registration in Korea.

Results

The topics of gastric epithelial tumor, colonic intramucosal carcinoma, neuroendocrine tumor (NET), gastrointestinal stromal tumor (GIST) and appendiceal mucinous tumor were discussed for new coding guidelines. A survey was then conducted among 208 members of the KSP for a consensus of the guidelines proposed in the workshop.

Conclusions

Although a few issues were set aside for further discussion, such as coding for non-gastric GIST and some types of NET, the members agreed upon most of the proposed guidelines. Therefore, we suggest using the newly revised International Classification of Diseases for Oncology, 3rd edition (ICD-O-3) coding guidelines for registering gastrointestinal tumors in Korea.

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