Journal of Pathology and Translational Medicine

Original Articles

Diagnostic proficiency test using digital cytopathology and comparative assessment of whole slide images of cytologic samples for quality assurance program in Korea: Yosep Chong, Soon Auck Hong, Hoon Kyu Oh, Soo Jin Jung, Bo-Sung Kim, Ji Yun Jeong, Ho-Chang Lee, Gyungyub Gong; J Pathol Transl Med. 2023;57(5):251-264. Published online August 24, 2023; DOI: https://doi.org/10.4132/jptm.2023.07.17

1,808 View
258 Download

Abstract PDF Supplementary Material: Background
The Korean Society for Cytopathology introduced a digital proficiency test (PT) in 2021. However, many doubtful opinions remain on whether digitally scanned images can satisfactorily present subtle differences in the nuclear features and chromatin patterns of cytological samples.
Methods
We prepared 30 whole-slide images (WSIs) from the conventional PT archive by a selection process for digital PT. Digital and conventional PT were performed in parallel for volunteer institutes, and the results were compared using feedback. To assess the quality of cytological assessment WSIs, 12 slides were collected and scanned using five different scanners, with four cytopathologists evaluating image quality through a questionnaire.
Results
Among the 215 institutes, 108 and 107 participated in glass and digital PT, respectively. No significant difference was noted in category C (major discordance), although the number of discordant cases was slightly higher in the digital PT group. Leica, 3DHistech Pannoramic 250 Flash, and Hamamatsu NanoZoomer 360 systems showed comparable results in terms of image quality, feature presentation, and error rates for most cytological samples. Overall satisfaction was observed with the general convenience and image quality of digital PT.
Conclusions
As three-dimensional clusters are common and nuclear/chromatin features are critical for cytological interpretation, careful selection of scanners and optimal conditions are mandatory for the successful establishment of digital quality assurance programs in cytology.

Development of quality assurance program for digital pathology by the Korean Society of Pathologists: Yosep Chong, Jeong Mo Bae, Dong Wook Kang, Gwangil Kim, Hye Seung Han; J Pathol Transl Med. 2022;56(6):370-382. Published online November 15, 2022; DOI: https://doi.org/10.4132/jptm.2022.09.30

1,637 View
110 Download
1 Web of Science
1 Crossref

Background
Digital pathology (DP) using whole slide imaging is a recently emerging game changer technology that can fundamentally change the way of working in pathology. The Digital Pathology Study Group (DPSG) of the Korean Society of Pathologists (KSP) published a consensus report on the recommendations for pathologic practice using DP. Accordingly, the need for the development and implementation of a quality assurance program (QAP) for DP has been raised.
Methods
To provide a standard baseline reference for internal and external QAP for DP, the members of the Committee of Quality Assurance of the KSP developed a checklist for the Redbook and a QAP trial for DP based on the prior DPSG consensus report. Four leading institutes participated in the QAP trial in the first year, and we gathered feedback from these institutes afterwards.
Results
The newly developed checklists of QAP for DP contain 39 items (216 score): eight items for quality control of DP systems; three for DP personnel; nine for hardware and software requirements for DP systems; 15 for validation, operation, and management of DP systems; and four for data security and personal information protection. Most participants in the QAP trial replied that continuous education on unfamiliar terminology and more practical experience is demanding.
Conclusions
The QAP for DP is essential for the safe implementation of DP in pathologic practice. Each laboratory should prepare an institutional QAP according to this checklist, and consecutive revision of the checklist with feedback from the QAP trial for DP needs to follow.

Citations

Citations to this article as recorded by

Diagnostic proficiency test using digital cytopathology and comparative assessment of whole slide images of cytologic samples for quality assurance program in Korea
Yosep Chong, Soon Auck Hong, Hoon Kyu Oh, Soo Jin Jung, Bo-Sung Kim, Ji Yun Jeong, Ho-Chang Lee, Gyungyub Gong
Journal of Pathology and Translational Medicine.2023; 57(5): 251. CrossRef

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

1,854 View
87 Download
3 Web of Science
2 Crossref

Abstract PDF Supplementary Material

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

Citations

Citations to this article as recorded by

A stepwise approach to fine needle aspiration cytology of lymph nodes
Yosep Chong, Gyeongsin Park, Hee Jeong Cha, Hyun-Jung Kim, Chang Suk Kang, Jamshid Abdul-Ghafar, Seung-Sook Lee
Journal of Pathology and Translational Medicine.2023; 57(4): 196. CrossRef
Diagnostic proficiency test using digital cytopathology and comparative assessment of whole slide images of cytologic samples for quality assurance program in Korea
Yosep Chong, Soon Auck Hong, Hoon Kyu Oh, Soo Jin Jung, Bo-Sung Kim, Ji Yun Jeong, Ho-Chang Lee, Gyungyub Gong
Journal of Pathology and Translational Medicine.2023; 57(5): 251. CrossRef

Review

Recommendations for pathologic practice using digital pathology: consensus report of the Korean Society of Pathologists: Yosep Chong, Dae Cheol Kim, Chan Kwon Jung, Dong-chul Kim, Sang Yong Song, Hee Jae Joo, Sang-Yeop Yi; J Pathol Transl Med. 2020;54(6):437-452. Published online October 8, 2020; DOI: https://doi.org/10.4132/jptm.2020.08.27

6,580 View
283 Download
17 Web of Science
18 Crossref

Abstract PDF Supplementary Material

Digital pathology (DP) using whole slide imaging (WSI) is becoming a fundamental issue in pathology with recent advances and the rapid development of associated technologies. However, the available evidence on its diagnostic uses and practical advice for pathologists on implementing DP remains insufficient, particularly in light of the exponential growth of this industry. To inform DP implementation in Korea, we developed relevant and timely recommendations. We first performed a literature review of DP guidelines, recommendations, and position papers from major countries, as well as a review of relevant studies validating WSI. Based on that information, we prepared a draft. After several revisions, we released this draft to the public and the members of the Korean Society of Pathologists through our homepage and held an open forum for interested parties. Through that process, this final manuscript has been prepared. This recommendation contains an overview describing the background, objectives, scope of application, and basic terminology; guidelines and considerations for the hardware and software used in DP systems and the validation required for DP implementation; conclusions; and references and appendices, including literature on DP from major countries and WSI validation studies.

Citations

Citations to this article as recorded by

Performance of externally validated machine learning models based on histopathology images for the diagnosis, classification, prognosis, or treatment outcome prediction in female breast cancer: A systematic review
Ricardo Gonzalez, Peyman Nejat, Ashirbani Saha, Clinton J.V. Campbell, Andrew P. Norgan, Cynthia Lokker
Journal of Pathology Informatics.2024; 15: 100348. CrossRef
ChatGPT as an aid for pathological diagnosis of cancer
Shaivy Malik, Sufian Zaheer
Pathology - Research and Practice.2024; 253: 154989. CrossRef
Remote Placental Sign-Out: What Digital Pathology Can Offer for Pediatric Pathologists
Casey P. Schukow, Jacqueline K. Macknis
Pediatric and Developmental Pathology.2024;[Epub] CrossRef
Digital Validation in Breast Cancer Needle Biopsies: Comparison of Histological Grade and Biomarker Expression Assessment Using Conventional Light Microscopy, Whole Slide Imaging, and Digital Image Analysis
Ji Eun Choi, Kyung-Hee Kim, Younju Lee, Dong-Wook Kang
Journal of Personalized Medicine.2024; 14(3): 312. CrossRef
Diagnostic Assessment of Deep Learning Algorithms for Frozen Tissue Section Analysis in Women with Breast Cancer
Young-Gon Kim, In Hye Song, Seung Yeon Cho, Sungchul Kim, Milim Kim, Soomin Ahn, Hyunna Lee, Dong Hyun Yang, Namkug Kim, Sungwan Kim, Taewoo Kim, Daeyoung Kim, Jonghyeon Choi, Ki-Sun Lee, Minuk Ma, Minki Jo, So Yeon Park, Gyungyub Gong
Cancer Research and Treatment.2023; 55(2): 513. CrossRef
Recent application of artificial intelligence on histopathologic image-based prediction of gene mutation in solid cancers
Mohammad Rizwan Alam, Kyung Jin Seo, Jamshid Abdul-Ghafar, Kwangil Yim, Sung Hak Lee, Hyun-Jong Jang, Chan Kwon Jung, Yosep Chong
Briefings in Bioinformatics.2023;[Epub] CrossRef
Sustainable development goals applied to digital pathology and artificial intelligence applications in low- to middle-income countries
Sumi Piya, Jochen K. Lennerz
Frontiers in Medicine.2023;[Epub] CrossRef
Diagnostic proficiency test using digital cytopathology and comparative assessment of whole slide images of cytologic samples for quality assurance program in Korea
Yosep Chong, Soon Auck Hong, Hoon Kyu Oh, Soo Jin Jung, Bo-Sung Kim, Ji Yun Jeong, Ho-Chang Lee, Gyungyub Gong
Journal of Pathology and Translational Medicine.2023; 57(5): 251. CrossRef
Real-World Implementation of Digital Pathology: Results From an Intercontinental Survey
Daniel Gomes Pinto, Andrey Bychkov, Naoko Tsuyama, Junya Fukuoka, Catarina Eloy
Laboratory Investigation.2023; 103(12): 100261. CrossRef
National digital pathology projects in Switzerland: A 2023 update
Rainer Grobholz, Andrew Janowczyk, Ana Leni Frei, Mario Kreutzfeldt, Viktor H. Koelzer, Inti Zlobec
Die Pathologie.2023; 44(S3): 225. CrossRef
Swiss digital pathology recommendations: results from a Delphi process conducted by the Swiss Digital Pathology Consortium of the Swiss Society of Pathology
Andrew Janowczyk, Inti Zlobec, Cedric Walker, Sabina Berezowska, Viola Huschauer, Marianne Tinguely, Joel Kupferschmid, Thomas Mallet, Doron Merkler, Mario Kreutzfeldt, Radivoje Gasic, Tilman T. Rau, Luca Mazzucchelli, Isgard Eyberg, Gieri Cathomas, Kirst
Virchows Archiv.2023;[Epub] CrossRef
Understanding the ethical and legal considerations of Digital Pathology
Cheryl Coulter, Francis McKay, Nina Hallowell, Lisa Browning, Richard Colling, Philip Macklin, Tom Sorell, Muhammad Aslam, Gareth Bryson, Darren Treanor, Clare Verrill
The Journal of Pathology: Clinical Research.2022; 8(2): 101. CrossRef
Current Trend of Artificial Intelligence Patents in Digital Pathology: A Systematic Evaluation of the Patent Landscape
Muhammad Joan Ailia, Nishant Thakur, Jamshid Abdul-Ghafar, Chan Kwon Jung, Kwangil Yim, Yosep Chong
Cancers.2022; 14(10): 2400. CrossRef
Recent Applications of Artificial Intelligence from Histopathologic Image-Based Prediction of Microsatellite Instability in Solid Cancers: A Systematic Review
Mohammad Rizwan Alam, Jamshid Abdul-Ghafar, Kwangil Yim, Nishant Thakur, Sung Hak Lee, Hyun-Jong Jang, Chan Kwon Jung, Yosep Chong
Cancers.2022; 14(11): 2590. CrossRef
Automated Hybrid Model for Detecting Perineural Invasion in the Histology of Colorectal Cancer
Jiyoon Jung, Eunsu Kim, Hyeseong Lee, Sung Hak Lee, Sangjeong Ahn
Applied Sciences.2022; 12(18): 9159. CrossRef
Development of quality assurance program for digital pathology by the Korean Society of Pathologists
Yosep Chong, Jeong Mo Bae, Dong Wook Kang, Gwangil Kim, Hye Seung Han
Journal of Pathology and Translational Medicine.2022; 56(6): 370. CrossRef
Improving quality control in the routine practice for histopathological interpretation of gastrointestinal endoscopic biopsies using artificial intelligence
Young Sin Ko, Yoo Mi Choi, Mujin Kim, Youngjin Park, Murtaza Ashraf, Willmer Rafell Quiñones Robles, Min-Ju Kim, Jiwook Jang, Seokju Yun, Yuri Hwang, Hani Jang, Mun Yong Yi, Anwar P.P. Abdul Majeed
PLOS ONE.2022; 17(12): e0278542. CrossRef
What is Essential is (No More) Invisible to the Eyes: The Introduction of BlocDoc in the Digital Pathology Workflow
Vincenzo L’Imperio, Fabio Gibilisco, Filippo Fraggetta
Journal of Pathology Informatics.2021; 12(1): 32. CrossRef

Original Articles

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

4,460 View
103 Download
4 Web of Science
4 Crossref

Abstract PDF Supplementary Material

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

Citations

Citations to this article as recorded by

Diagnostic proficiency test using digital cytopathology and comparative assessment of whole slide images of cytologic samples for quality assurance program in Korea
Yosep Chong, Soon Auck Hong, Hoon Kyu Oh, Soo Jin Jung, Bo-Sung Kim, Ji Yun Jeong, Ho-Chang Lee, Gyungyub Gong
Journal of Pathology and Translational Medicine.2023; 57(5): 251. CrossRef
Recent Application of Artificial Intelligence in Non-Gynecological Cancer Cytopathology: A Systematic Review
Nishant Thakur, Mohammad Rizwan Alam, Jamshid Abdul-Ghafar, Yosep Chong
Cancers.2022; 14(14): 3529. CrossRef
Re-Increasing Trends in Thyroid Cancer Incidence after a Short Period of Decrease in Korea: Reigniting the Debate on Ultrasound Screening
Chan Kwon Jung, Ja Seong Bae, Young Joo Park
Endocrinology and Metabolism.2022; 37(5): 816. CrossRef
Current status of cytopathology practice in Korea: impact of the coronavirus pandemic on cytopathology practice
Soon Auck Hong, Haeyoen Jung, Sung Sun Kim, Min-Sun Jin, Jung-Soo Pyo, Ji Yun Jeong, Younghee Choi, Gyungyub Gong, Yosep Chong
Journal of Pathology and Translational Medicine.2022; 56(6): 361. CrossRef

Continuous quality improvement program and its results of Korean Society for Cytopathology: Yoo-Duk Choi, Hoon-Kyu Oh, Su-Jin Kim, Kyung-Hee Kim, Yun-Kyung Lee, Bo-Sung Kim, Eun-Jeong Jang, Yoon-Jung Choi, Eun-Kyung Han, Dong-Hoon Kim, Younghee Choi, Chan-Kwon Jung, Sung-Nam Kim, Kyueng-Whan Min, Seok-Jin Yoon, Hun-Kyung Lee, Kyung Un Choi, Hye Kyoung Yoon; J Pathol Transl Med. 2020;54(3):246-252. Published online April 15, 2020; DOI: https://doi.org/10.4132/jptm.2020.02.22

4,261 View
118 Download
3 Web of Science
3 Crossref

Abstract PDF

Background
Since 1995, the Korean Society for Cytopathology has overseen the Continuous Quality Improvement program for cytopathology laboratories. The Committee of Quality Improvement has carried out an annual survey of cytology data for each laboratory and set standards for proficiency tests. Methods: Evaluations were conducted four times per year from 2008 to 2018 and comprised statistics regarding cytology diagnoses of previous years, proficiency tests using cytology slides provided by the committee, assessment of adequacy of gynecology (GYN) cytology slides, and submission of cytology slides for proficiency tests. Results: A total of 206 institutes participated in 2017, and the results were as follows. The number of cytology tests increased from year to year. The ratio of liquid-based cytology in GYN gradually decreased, as most of the GYN cytology had been performed at commercial laboratories. The distribution of GYN diagnoses demonstrated nearly 3.0% as atypical squamous cells. The rate for squamous cell carcinoma was less than 0.02%. The atypical squamous cell/squamous intraepithelial lesion ratio was about 3:1 and showed an upward trend. The major discordant rate of cytology-histology in GYN cytology was less than 1%. The proficiency test maintained a major discordant rate less than 2%. The rate of inappropriate specimens for GYN cytology slides gradually decreased. Conclusions: The Continuous Quality Improvement program should be included in quality assurance programs. Moreover, these data can contribute to development of national cancer examination guidelines and facilitate cancer prevention and treatment.

Citations

Citations to this article as recorded by

Diagnostic proficiency test using digital cytopathology and comparative assessment of whole slide images of cytologic samples for quality assurance program in Korea
Yosep Chong, Soon Auck Hong, Hoon Kyu Oh, Soo Jin Jung, Bo-Sung Kim, Ji Yun Jeong, Ho-Chang Lee, Gyungyub Gong
Journal of Pathology and Translational Medicine.2023; 57(5): 251. CrossRef
Re-Increasing Trends in Thyroid Cancer Incidence after a Short Period of Decrease in Korea: Reigniting the Debate on Ultrasound Screening
Chan Kwon Jung, Ja Seong Bae, Young Joo Park
Endocrinology and Metabolism.2022; 37(5): 816. CrossRef
Current status of cytopathology practice in Korea: impact of the coronavirus pandemic on cytopathology practice
Soon Auck Hong, Haeyoen Jung, Sung Sun Kim, Min-Sun Jin, Jung-Soo Pyo, Ji Yun Jeong, Younghee Choi, Gyungyub Gong, Yosep Chong
Journal of Pathology and Translational Medicine.2022; 56(6): 361. CrossRef

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

6,745 View
163 Download
12 Web of Science
13 Crossref

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.

Citations

Citations to this article as recorded by

Current state of cytopathology residency training: a Korean national survey of pathologists
Uiju Cho, Tae Jung Kim, Wan Seop Kim, Kyo Young Lee, Hye Kyoung Yoon, Hyun Joo Choi
Journal of Pathology and Translational Medicine.2023; 57(2): 95. CrossRef
Diagnostic proficiency test using digital cytopathology and comparative assessment of whole slide images of cytologic samples for quality assurance program in Korea
Yosep Chong, Soon Auck Hong, Hoon Kyu Oh, Soo Jin Jung, Bo-Sung Kim, Ji Yun Jeong, Ho-Chang Lee, Gyungyub Gong
Journal of Pathology and Translational Medicine.2023; 57(5): 251. CrossRef
Recent Application of Artificial Intelligence in Non-Gynecological Cancer Cytopathology: A Systematic Review
Nishant Thakur, Mohammad Rizwan Alam, Jamshid Abdul-Ghafar, Yosep Chong
Cancers.2022; 14(14): 3529. CrossRef
Re-Increasing Trends in Thyroid Cancer Incidence after a Short Period of Decrease in Korea: Reigniting the Debate on Ultrasound Screening
Chan Kwon Jung, Ja Seong Bae, Young Joo Park
Endocrinology and Metabolism.2022; 37(5): 816. CrossRef
Diagnostic distribution and pitfalls of glandular abnormalities in cervical cytology: a 25-year single-center study
Jung-A Sung, Ilias P. Nikas, Haeryoung Kim, Han Suk Ryu, Cheol Lee
Journal of Pathology and Translational Medicine.2022; 56(6): 354. CrossRef
Current status of cytopathology practice in Korea: impact of the coronavirus pandemic on cytopathology practice
Soon Auck Hong, Haeyoen Jung, Sung Sun Kim, Min-Sun Jin, Jung-Soo Pyo, Ji Yun Jeong, Younghee Choi, Gyungyub Gong, Yosep Chong
Journal of Pathology and Translational Medicine.2022; 56(6): 361. CrossRef
Systematic screening for cervical cancer in Dakar region: prevalence and correlation with biological and socio-demographic parameters
Dominique Diouf, Gora Diop, Cheikh Ahmadou Tidian Diarra, Aminata Issa Ngom, Khadija Niane, Moussa Ndiaye, Sidy Ka, Oumar Faye, Ahmadou Dem
Infectious Agents and Cancer.2020;[Epub] CrossRef
Continuous quality improvement program and its results of Korean Society for Cytopathology
Yoo-Duk Choi, Hoon-Kyu Oh, Su-Jin Kim, Kyung-Hee Kim, Yun-Kyung Lee, Bo-Sung Kim, Eun-Jeong Jang, Yoon-Jung Choi, Eun-Kyung Han, Dong-Hoon Kim, Younghee Choi, Chan-Kwon Jung, Sung-Nam Kim, Kyueng-Whan Min, Seok-Jin Yoon, Hun-Kyung Lee, Kyung Un Choi, Hye
Journal of Pathology and Translational Medicine.2020; 54(3): 246. CrossRef
Current status of cytopathology practices in Korea: annual report on the Continuous Quality Improvement program of the Korean Society for Cytopathology for 2018
Yosep Chong, Haeyoen Jung, Jung-Soo Pyo, Soon Won Hong, Hoon Kyu Oh
Journal of Pathology and Translational Medicine.2020; 54(4): 318. CrossRef
Current Status of and Perspectives on Cervical Cancer Screening in Korea
Sung-Chul Lim, Chong Woo Yoo
Journal of Pathology and Translational Medicine.2019; 53(4): 210. CrossRef
Cytomorphological Features of Hyperchromatic Crowded Groups in Liquid-Based Cervicovaginal Cytology: A Single Institutional Experience
Youngeun Lee, Cheol Lee, In Ae Park, Hyoung Jin An, Haeryoung Kim
Journal of Pathology and Translational Medicine.2019; 53(6): 393. CrossRef
Comparison Study of the Adequacy and Pain Scale of Ultrasound-Guided Fine-Needle Aspiration of Solid Thyroid Nodules with a 21- or 23-Gauge Needle for Liquid-Based Cytology: a Single-Center Study
Soo Jin Jung, Dong Wook Kim, Hye Jin Baek
Endocrine Pathology.2018; 29(1): 30. CrossRef
Thyroid Fine-Needle Aspiration Cytology Practice in Korea
Yoon Jin Cha, Ju Yeon Pyo, SoonWon Hong, Jae Yeon Seok, Kyung-Ju Kim, Jee-Young Han, Jeong Mo Bae, Hyeong Ju Kwon, Yeejeong Kim, Kyueng-Whan Min, Soonae Oak, Sunhee Chang
Journal of Pathology and Translational Medicine.2017; 51(6): 521. CrossRef

Review

Good Laboratory Standards for Clinical Next-Generation Sequencing Cancer Panel Tests: Jihun Kim, Woong-Yang Park, Nayoung K. D. Kim, Se Jin Jang, Sung-Min Chun, Chang-Ohk Sung, Jene Choi, Young-Hyeh Ko, Yoon-La Choi, Hyo Sup Shim, Jae-Kyung Won; J Pathol Transl Med. 2017;51(3):191-204. Published online May 10, 2017; DOI: https://doi.org/10.4132/jptm.2017.03.14

22,908 View
1,054 Download
30 Web of Science
31 Crossref

Abstract PDF

Next-generation sequencing (NGS) has recently emerged as an essential component of personalized cancer medicine due to its high throughput and low per-base cost. However, no sufficient guidelines for implementing NGS as a clinical molecular pathology test are established in Korea. To ensure clinical grade quality without inhibiting adoption of NGS, a taskforce team assembled by the Korean Society of Pathologists developed laboratory guidelines for NGS cancer panel testing procedures and requirements for clinical implementation of NGS. This consensus standard proposal consists of two parts: laboratory guidelines and requirements for clinical NGS laboratories. The laboratory guidelines part addressed several important issues across multistep NGS cancer panel tests including choice of gene panel and platform, sample handling, nucleic acid management, sample identity tracking, library preparation, sequencing, analysis and reporting. Requirements for clinical NGS tests were summarized in terms of documentation, validation, quality management, and other required written policies. Together with appropriate pathologist training and international laboratory standards, these laboratory standards would help molecular pathology laboratories to successfully implement NGS cancer panel tests in clinic. In this way, the oncology community would be able to help patients to benefit more from personalized cancer medicine.

Citations

Citations to this article as recorded by

Validation and Clinical Application of ONCOaccuPanel for Targeted Next-Generation Sequencing of Solid Tumors
Moonsik Kim, Changseon Lee, Juyeon Hong, Juhee Kim, Ji Yun Jeong, Nora Jee-Young Park, Ji-Eun Kim, Ji Young Park
Cancer Research and Treatment.2023; 55(2): 429. CrossRef
Establishing molecular pathology curriculum for pathology trainees and continued medical education: a collaborative work from the Molecular Pathology Study Group of the Korean Society of Pathologists
Jiwon Koh, Ha Young Park, Jeong Mo Bae, Jun Kang, Uiju Cho, Seung Eun Lee, Haeyoun Kang, Min Eui Hong, Jae Kyung Won, Youn-La Choi, Wan-Seop Kim, Ahwon Lee
Journal of Pathology and Translational Medicine.2023; 57(5): 265. CrossRef
Clinical applications of next-generation sequencing in the diagnosis of genetic disorders in Korea: a narrative review
Jihoon G. Yoon, Man Jin Kim, Yong Jin Kwon, Jong-Hee Chae
Journal of the Korean Medical Association.2023; 66(10): 613. CrossRef
Obtaining spatially resolved tumor purity maps using deep multiple instance learning in a pan-cancer study
Mustafa Umit Oner, Jianbin Chen, Egor Revkov, Anne James, Seow Ye Heng, Arife Neslihan Kaya, Jacob Josiah Santiago Alvarez, Angela Takano, Xin Min Cheng, Tony Kiat Hon Lim, Daniel Shao Weng Tan, Weiwei Zhai, Anders Jacobsen Skanderup, Wing-Kin Sung, Hwee
Patterns.2022; 3(2): 100399. CrossRef
Update on Molecular Diagnosis in Extranodal NK/T-Cell Lymphoma and Its Role in the Era of Personalized Medicine
Ka-Hei (Murphy) Sun, Yin-Ting (Heylie) Wong, Ka-Man (Carmen) Cheung, Carmen (Michelle) Yuen, Yun-Tat (Ted) Chan, Wing-Yan (Jennifer) Lai, Chun (David) Chao, Wing-Sum (Katie) Fan, Yuen-Kiu (Karen) Chow, Man-Fai Law, Ho-Chi (Tommy) Tam
Diagnostics.2022; 12(2): 409. CrossRef
Defining Novel DNA Virus-Tumor Associations and Genomic Correlates Using Prospective Clinical Tumor/Normal Matched Sequencing Data
Chad M. Vanderbilt, Anita S. Bowman, Sumit Middha, Kseniya Petrova-Drus, Yi-Wei Tang, Xin Chen, Youxiang Wang, Jason Chang, Natasha Rekhtman, Klaus J. Busam, Sounak Gupta, Meera Hameed, Maria E. Arcila, Marc Ladanyi, Michael F. Berger, Snjezana Dogan, Ahm
The Journal of Molecular Diagnostics.2022; 24(5): 515. CrossRef
Performance Evaluation of Three DNA Sample Tracking Tools in a Whole Exome Sequencing Workflow
Gertjan Wils, Céline Helsmoortel, Pieter-Jan Volders, Inge Vereecke, Mauro Milazzo, Jo Vandesompele, Frauke Coppieters, Kim De Leeneer, Steve Lefever
Molecular Diagnosis & Therapy.2022; 26(4): 411. CrossRef
Clinical Quality Considerations when Using Next-Generation Sequencing (NGS) in Clinical Drug Development
Timothé Ménard, Alaina Barros, Christopher Ganter
Therapeutic Innovation & Regulatory Science.2021; 55(5): 1066. CrossRef
Fast Healthcare Interoperability Resources (FHIR)–Based Quality Information Exchange for Clinical Next-Generation Sequencing Genomic Testing: Implementation Study
Donghyeong Seong, Sungwon Jung, Sungchul Bae, Jongsuk Chung, Dae-Soon Son, Byoung-Kee Yi
Journal of Medical Internet Research.2021; 23(4): e26261. CrossRef
Status of Next-Generation Sequencing-Based Genetic Diagnosis in Hematologic Malignancies in Korea (2017-2018)
JinJu Kim, Ja Young Lee, Jungwon Huh, Myung-Hyun Nam, Myungshin Kim, Young-Uk Cho, Sun-Young Kong, Seung-Tae Lee, In-Suk Kim
Laboratory Medicine Online.2021; 11(1): 25. CrossRef
MSI-Testung
Josef Rüschoff, Gustavo Baretton, Hendrik Bläker, Wolfgang Dietmaier, Manfred Dietel, Arndt Hartmann, Lars-Christian Horn, Korinna Jöhrens, Thomas Kirchner, Ruth Knüchel, Doris Mayr, Sabine Merkelbach-Bruse, Hans-Ulrich Schildhaus, Peter Schirmacher, Mark
Der Pathologe.2021; 42(4): 414. CrossRef
Molecular biomarker testing for non–small cell lung cancer: consensus statement of the Korean Cardiopulmonary Pathology Study Group
Sunhee Chang, Hyo Sup Shim, Tae Jung Kim, Yoon-La Choi, Wan Seop Kim, Dong Hoon Shin, Lucia Kim, Heae Surng Park, Geon Kook Lee, Chang Hun Lee
Journal of Pathology and Translational Medicine.2021; 55(3): 181. CrossRef
MSI testing
Josef Rüschoff, Gustavo Baretton, Hendrik Bläker, Wolfgang Dietmaier, Manfred Dietel, Arndt Hartmann, Lars-Christian Horn, Korinna Jöhrens, Thomas Kirchner, Ruth Knüchel, Doris Mayr, Sabine Merkelbach-Bruse, Hans-Ulrich Schildhaus, Peter Schirmacher, Mark
Der Pathologe.2021; 42(S1): 110. CrossRef
16S rDNA microbiome composition pattern analysis as a diagnostic biomarker for biliary tract cancer
Huisong Lee, Hyeon Kook Lee, Seog Ki Min, Won Hee Lee
World Journal of Surgical Oncology.2020;[Epub] CrossRef
Risk Stratification Using a Novel Genetic Classifier IncludingPLEKHS1Promoter Mutations for Differentiated Thyroid Cancer with Distant Metastasis
Chan Kwon Jung, Seung-Hyun Jung, Sora Jeon, Young Mun Jeong, Yourha Kim, Sohee Lee, Ja-Seong Bae, Yeun-Jun Chung
Thyroid.2020; 30(11): 1589. CrossRef
Biomarker testing for advanced lung cancer by next-generation sequencing; a valid method to achieve a comprehensive glimpse at mutational landscape
Anurag Mehta, Smreti Vasudevan, Sanjeev Kumar Sharma, Manoj Panigrahi, Moushumi Suryavanshi, Mumtaz Saifi, Ullas Batra
Applied Cancer Research.2020;[Epub] CrossRef
Application Areas of Traditional Molecular Genetic Methods and NGS in relation to Hereditary Urological Cancer Diagnosis
Dmitry S. Mikhaylenko, Alexander S. Tanas, Dmitry V. Zaletaev, Marina V. Nemtsova
Journal of Oncology.2020; 2020: 1. CrossRef
Assembling and Validating Bioinformatic Pipelines for Next-Generation Sequencing Clinical Assays
Jeffrey A SoRelle, Megan Wachsmann, Brandi L. Cantarel
Archives of Pathology & Laboratory Medicine.2020; 144(9): 1118. CrossRef
Standard operating procedure for somatic variant refinement of sequencing data with paired tumor and normal samples
Erica K. Barnell, Peter Ronning, Katie M. Campbell, Kilannin Krysiak, Benjamin J. Ainscough, Lana M. Sheta, Shahil P. Pema, Alina D. Schmidt, Megan Richters, Kelsy C. Cotto, Arpad M. Danos, Cody Ramirez, Zachary L. Skidmore, Nicholas C. Spies, Jasreet Hun
Genetics in Medicine.2019; 21(4): 972. CrossRef
A DNA pool of FLT3-ITD positive DNA samples can be used efficiently for analytical evaluation of NGS-based FLT3-ITD quantitation - Testing several different ITD sequences and rates, simultaneously
Zoltán A. Mezei, Dávid Tornai, Róza Földesi, László Madar, Andrea Sümegi, Mária Papp, Péter Antal-Szalmás
Journal of Biotechnology.2019; 303: 25. CrossRef
Pharmacogenomic Testing: Clinical Evidence and Implementation Challenges
Hippman, Nislow
Journal of Personalized Medicine.2019; 9(3): 40. CrossRef
Cancer Panel Assay for Precision Oncology Clinic: Results from a 1-Year Study
Dohee Kwon, Binnari Kim, Hyeong Chan Shin, Eun Ji Kim, Sang Yun Ha, Kee-Taek Jang, Seung Tae Kim, Jeeyun Lee, Won Ki Kang, Joon Oh Park, Kyoung-Mee Kim
Translational Oncology.2019; 12(11): 1488. CrossRef
Analytical Evaluation of an NGS Testing Method for Routine Molecular Diagnostics on Melanoma Formalin-Fixed, Paraffin-Embedded Tumor-Derived DNA
Mancini, Simi, Salvianti, Castiglione, Sonnati, Pinzani
Diagnostics.2019; 9(3): 117. CrossRef
Benchmark Database for Process Optimization and Quality Control of Clinical Cancer Panel Sequencing
Donghyeong Seong, Jongsuk Chung, Ki-Wook Lee, Sook-Young Kim, Byung-Suk Kim, Jung-Keun Song, Sungwon Jung, Taeseob Lee, Donghyun Park, Byoung-Kee Yi, Woong-Yang Park, Dae-Soon Son
Biotechnology and Bioprocess Engineering.2019; 24(5): 793. CrossRef
Use of the Ion PGM and the GeneReader NGS Systems in Daily Routine Practice for Advanced Lung Adenocarcinoma Patients: A Practical Point of View Reporting a Comparative Study and Assessment of 90 Patients
Simon Heeke, Véronique Hofman, Elodie Long-Mira, Virginie Lespinet, Salomé Lalvée, Olivier Bordone, Camille Ribeyre, Virginie Tanga, Jonathan Benzaquen, Sylvie Leroy, Charlotte Cohen, Jérôme Mouroux, Charles Marquette, Marius Ilié, Paul Hofman
Cancers.2018; 10(4): 88. CrossRef
Use of the Ion AmpliSeq Cancer Hotspot Panel in clinical molecular pathology laboratories for analysis of solid tumours: With emphasis on validation with relevant single molecular pathology tests and the Oncomine Focus Assay
Ahwon Lee, Sung-Hak Lee, Chan Kwon Jung, Gyungsin Park, Kyo Young Lee, Hyun Joo Choi, Ki Ouk Min, Tae Jung Kim, Eun Jung Lee, Youn Soo Lee
Pathology - Research and Practice.2018; 214(5): 713. CrossRef
Recent Advancement of the Molecular Diagnosis in Pediatric Brain Tumor
Jeong-Mo Bae, Jae-Kyung Won, Sung-Hye Park
Journal of Korean Neurosurgical Society.2018; 61(3): 376. CrossRef
The long tail of molecular alterations in non-small cell lung cancer: a single-institution experience of next-generation sequencing in clinical molecular diagnostics
Caterina Fumagalli, Davide Vacirca, Alessandra Rappa, Antonio Passaro, Juliana Guarize, Paola Rafaniello Raviele, Filippo de Marinis, Lorenzo Spaggiari, Chiara Casadio, Giuseppe Viale, Massimo Barberis, Elena Guerini-Rocco
Journal of Clinical Pathology.2018; 71(9): 767. CrossRef
Clinical laboratory utilization management and improved healthcare performance
Christopher Naugler, Deirdre L. Church
Critical Reviews in Clinical Laboratory Sciences.2018; 55(8): 535. CrossRef
Development of HLA-A, -B and -DR Typing Method Using Next-Generation Sequencing
Dong Hee Seo, Jeong Min Lee, Mi Ok Park, Hyun Ju Lee, Seo Yoon Moon, Mijin Oh, So Young Kim, Sang-Heon Lee, Ki-Eun Hyeong, Hae-Jin Hu, Dae-Yeon Cho
The Korean Journal of Blood Transfusion.2018; 29(3): 310. CrossRef
Value-based genomics
Jun Gong, Kathy Pan, Marwan Fakih, Sumanta Pal, Ravi Salgia
Oncotarget.2018; 9(21): 15792. CrossRef

Original Article

Quality Control Program for Fresh Frozen Tissue and Its Results of Chonbuk National University Hospital National Biobank of Korea.: Shin Young Park, Hyun Ah Baek, Hyoung Jong Kwak, Sang Hyun Hong, Ho Sung Park, Kyu Yun Jang, Woo Sung Moon, Myoung Jae Kang, Dong Geun Lee, Myoung Ja Chung; Korean J Pathol. 2010;44(3):295-301.; DOI: https://doi.org/10.4132/KoreanJPathol.2010.44.3.295

3,920 View
42 Download
1 Crossref

Abstract PDF

BACKGROUND
Molecular tools for tissue profiling generally require collection of fresh frozen tissues (FFT) as sources of high-quality DNA and RNA. Nowadays, researchers carry out large-scale, multi-center studies and they request inter-institutional minimal intrinsic bias, some fundamental similarities, and the same standardized and validated procedures.
METHODS
This study reports standardized quality control procedure for fresh frozen tissue of the National Biobank of Korea.
RESULTS
The main procedures for quality control for FFT are as follows: records related to sample collection such as labeling of samples, transport temperature, lag time from excision of tissue to freezing, and sample size were reviewed for all fresh frozen samples. The stability of RNA and DNA in fresh frozen tissue was evaluated for 3% of collected samples and purity was assessed (ratio of the absorbance at 260 and 280 nm) as was integrity (agarose gel electrophoresis). Stained hematoxylin and eosin sections were reviewed by a pathologist to confirm the diagnosis and to assess how representative the frozen sample was.
CONCLUSIONS
We introduced that the quality-control criteria for fresh frozen tissue of the NBK. We expect that this study contributes to standardization of collection, storage, and quality control of fresh frozen tissue.

Citations

Citations to this article as recorded by

Influence of Cold Ischemia Time and Storage Period on DNA Quality and Biomarker Research in Biobanked Colorectal Cancer Tissues
Min Gyoung Pak, Mee Sook Roh
Kosin Medical Journal.2020; 35(1): 26. CrossRef

Review

Quality Control Program and Its Results of Korean Society for Cytopathologists.: Hye Kyung Lee, Sung Nam Kim, Shin Kwang Khang, Chang Suk Kang, Hye Kyoung Yoon; Korean J Cytopathol. 2008;19(2):65-71.; DOI: https://doi.org/10.3338/kjc.2008.19.2.65

2,348 View
21 Download
9 Crossref

Abstract PDF

In Korea, the quality control(QC) program forcytopathology was introduced in 1995. The program consists of a checklist for the cytolopathology departments, analysis data on all the participating institutions' QC data, including the annual data on cytologic examinations, the distribution of the gynecological cytologic diagnoses, as based on The Bethesda System 2001, and the data on cytologic-histolgical correlation of the gynecological field, and an evaluation for diagnostic accuracy. The diagnostic accuracy program has been performed 3 times per year with using gynecological, body fluid and fine needle aspiration cytologic slides. We report here on the institutional QC data and the evaluation for diagnostic accuracy since 2004, and also on the new strategy for quality control and assurance in the cytologic field. The diagnostic accuracy results of both the participating institutions and the QC committee were as follows; Category 0 and A: about 94%, Category B: 4~5%, Category C: less than 2%. As a whole, the cytologic daignostic accuracy is relatively satisfactory. In 2008, on site evaluation for pathology and cytology laboratories, as based on the "Quality Assurance Program for Pathology Services" is now going on, and a new method using virtual slides or image files for determining the diagnostic accuracy will be performed in November 2008.

Citations

Citations to this article as recorded by

Diagnostic proficiency test using digital cytopathology and comparative assessment of whole slide images of cytologic samples for quality assurance program in Korea
Yosep Chong, Soon Auck Hong, Hoon Kyu Oh, Soo Jin Jung, Bo-Sung Kim, Ji Yun Jeong, Ho-Chang Lee, Gyungyub Gong
Journal of Pathology and Translational Medicine.2023; 57(5): 251. CrossRef
Usefulness of p16INK4a Immunocytochemical staining for the Differentiation between Atrophy and ASCUS in Diagnosis of Uterine Cervical Cancer
Hye Ryoung Shin, Taekil Eom, Wan-Su Choi
Biomedical Science Letters.2023; 29(3): 144. CrossRef
Current status of cytopathology practice in Korea: impact of the coronavirus pandemic on cytopathology practice
Soon Auck Hong, Haeyoen Jung, Sung Sun Kim, Min-Sun Jin, Jung-Soo Pyo, Ji Yun Jeong, Younghee Choi, Gyungyub Gong, Yosep Chong
Journal of Pathology and Translational Medicine.2022; 56(6): 361. CrossRef
Current status of cytopathology practices in Korea: annual report on the Continuous Quality Improvement program of the Korean Society for Cytopathology for 2018
Yosep Chong, Haeyoen Jung, Jung-Soo Pyo, Soon Won Hong, Hoon Kyu Oh
Journal of Pathology and Translational Medicine.2020; 54(4): 318. CrossRef
Continuous quality improvement program and its results of Korean Society for Cytopathology
Yoo-Duk Choi, Hoon-Kyu Oh, Su-Jin Kim, Kyung-Hee Kim, Yun-Kyung Lee, Bo-Sung Kim, Eun-Jeong Jang, Yoon-Jung Choi, Eun-Kyung Han, Dong-Hoon Kim, Younghee Choi, Chan-Kwon Jung, Sung-Nam Kim, Kyueng-Whan Min, Seok-Jin Yoon, Hun-Kyung Lee, Kyung Un Choi, Hye
Journal of Pathology and Translational Medicine.2020; 54(3): 246. CrossRef
Current Status of and Perspectives on Cervical Cancer Screening in Korea
Sung-Chul Lim, Chong Woo Yoo
Journal of Pathology and Translational Medicine.2019; 53(4): 210. CrossRef
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
Journal of Pathology and Translational Medicine.2017; 51(6): 579. CrossRef
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
Journal of Pathology and Translational Medicine.2017; 51(3): 314. CrossRef
The Usefulness of p16INK4aImmunocytochemical Staining in ASC-H Patients
Kwang Il Yim, Yeo-Ju Kang, Tae Eun Kim, Gyeongsin Park, Eun Sun Jung, Yeong-Jin Choi, Kyo-Young Lee, Chang Seok Kang, Ahwon Lee
The Korean Journal of Pathology.2011; 45(3): 290. CrossRef

Original Articles

Quality Assurance of Intraoperative Consultation Review Analysis of 2,392 frozen sections.: Dong Hae Chung, Jae Hee Suh, On Ja Kim; Korean J Pathol. 1997;31(4):332-341.

1,907 View
46 Download

Abstract PDF: A retrospective quality assurance study of intraoperative consultation (frozen section) was carried out to assess the accuracy and to determine the reasons of discordance. Of 14,977 surgical pathology cases accessioned over a 6-month period in Asan Medical Center, frozen sections were done on 1,270 (8.5%) patients and 2,392 frozen sections (1.88 frozen sections/case) were performed. Discordance was noted in 106 cases (4.4%) and diagnosis was deferred in 26 cases (1.1%). All deferred cases were reviewed with the result of 53.8% justified and 46.2% unjustified. The discordant cases were divided into three categories as to their clinical significances: category A (no affect on patient care) 61.3%, B (minimal affect) 9.4%, and C (major affect) 29.2%. Of 31 category C cases, 7 cases were false positive and 24 cases were false negative. Misinterpretation (70.8%) was the leading cause of discordance, followed by sampling error (15.1%), failure to identify lesion (8.5%), and technical problem (5.7%). More than one-third (35.8%) of all discordances were of central nervous system cases. Total central nervous system cases were 403 (16.8%) with a significantly higher disordance rate (9.8%) and deferral rate (2.5%) in comparison to the other cases with 3.4% discordance rate and 0.8% deferral rate. There were 43 colorectal cancer cases of intraoperative consultation for adequacy of resectional margins. The surgical margins were between 0.4 cm and 28 cm (mean: 6.7 cm) away from the tumor and there was no tumor-positive case. The study indicates surgical pathology should 1) promote interpretative skills in cases involving minute fragments of neurosurgical cases, 2) defer the diagnosis and ask for more tissue on inadequate or inappropriate specimens and 3) give only gross opinions without unnecessary frozen section procedures in the event of simple, clear-cut cases.

Cytologic and Histologic Correlation for Quality Assurance in Aspiration Cytology.: Ho Jung Lee, Young Mee Cho, So Young Park, Joo ryung Huh, On Ja Kim, Gyung Yub Gong; Korean J Pathol. 1997;31(11):1214-1221.

2,140 View
11 Download

Abstract: For quality assurance purposes, the authors correlated aspiration cytology and subsequent tissue findings and examined the reasons for discrepancies. In three months from Jan. to Mar. 1996, 1,383 aspirations were performed, of which 285 (20.6%) had subsequent tissue diagnoses within two months. The aspiration sites were thyroid (483), lymph node (LN) (290), breast (250), soft tissue (154), liver (89), lung (49), salivary gland (26), pancreas (22), gallbladder (3), bone (3), joint (2), adrenal gland (2), scrotum (2), mediastinum (2), omentum (2), oral cavity (1), chest wall (1), and intraabdominal (1) and pelvic cavities (1). A total of 68 discrepancies were identified, and biopsies and smears from these cases were reviewed monthly. In 27 cases (40%), the discrepancy was attributed to sampling error. In five cases (9%), aspiration gave superior results with better sampling and preservation than biopsy. Thirty six cases (53% of discrepant cases) were errors in cytologic diagnosis. We categorized these discrepancies into "A", "B", and "C" ("A": minor disagreement with no affect on patient care, "B": minimal affect on patient care, "C": major affect on patient care), which were 9 (13%), 14 (21%) and 13 (19%) cases, respectively. In thirteen cases of category "C", there were eleven false negative and two false positive diagnoses. Eleven false negative cases included thyroid (3), lymph node (2), breast (2), bone (1), salivary gland (1), lung (1), and liver (1). Three cases of thyroid were papillary carcinomas diagnosed as nodular hyperplasia (1), occasional pleomorphic cells (1), and cystic change (1). Two breast cases of invasive ductal carcinomas were diagnosed as ductal hyperplasia. A malignant lymphoma was diagnosed as reactive hyperplasia and a metastatic carcinoma of LN was diagnosed as tuberculosis. Other cases were malignant tumors of bone, salivary gland, lung, and liver those were misinterpreted as benign lesion or normal. Of two false positive cases, one was nodular hyperplasia of thyroid diagnosed as papillary carcinoma and the other was normal islet cell of pancreas diagnosed as islet cell tumor. A continuous monitoring of laboratory performance is an essential component of the quality control and assurance, and the review of discrepant cases provides useful information for improvement of diagnosis.

The Current Practice of the Autopsy Services and the Autopsy Records at the Seoul National University Hospital.: Jeong Wook Seo, Yoon Sung Lee, Je Geun Chi, Ghee Young Choe, Soong Deok Lee, Chong Jai Kim, In Ae Park, Woo Ho Kim, Ja June Jang, Chul Woo Kim, Seong Hoe Park, Jung Bin Lee, Hyun Soon Lee, Yong Il Kim, Eui Keun Ham, Sang Kook Lee; Korean J Pathol. 1998;32(6):453-459.

1,652 View
10 Download

Abstract: This study outlines the current status of the autopsy practice and the medical records for autopsies at the Department of Pathology, Seoul National University Hospital. Total number of autopsy cases from 1954 to 1995 was 3,131. Adults aged over 17 were 371 cases and children were 2,515 cases. The demographic data in 245 cases was not available. The number of adult autopsies and its proportion among total number of autopsies during 10-year periods decreased from 144 cases (40%) during the 10-year-period from 1956 to 52 cases (3%) during the 10-year-period from 1986. The number of children cases during the same period groups increased slightly from 210 cases (58%) to 393 cases (25%). But the number of fetal cases increased rapidly from 7 cases (2%) to 1,146 cases (72%). Among fetal autopsies the proportion of fetuses died earlier than 24 weeks of gestation increased and this figure exceeds that of fetuses that died later than 24 weeks of gestation from 1992. Forty percent of the cases were submitted from the clinical departments of the Seoul National University Hospital but the remainders were referred from 73 hospitals. Final autopsy diagnoses were analysed according to the Korean Standard Classification of Disease (KCD)-3 coding system and by searching key words for all cases. Common diagnoses as coded among cases from 1990 were P9, P0, P2, Q2 and Q0. Common diseases by key words for adult cases were liver disease, tuberculosis and pneumonia. Common diseases for children cases were pneumonia, hyaline membrane disease, meningitis and tuberculosis. Through this study we could show the importance of autopsy services for fetuses. We could also establish a regular registration system for autopsies at general hospitals.

Image Standardization and Determination of Gray Level Threshold in the Assessment of the Myocardial Fibrosis by the Computerized Image Analysis.: Nam Young Lee, Young Sik Park, Jin Haeng Chung, Jeong Wook Seo; Korean J Pathol. 1998;32(7):494-503.

1,411 View
10 Download

Abstract: The computerized image analysis is a useful tool for the quantitative assessment of histopathologic findings. In contrast to the usual microscopic examination by pathologists, the computerization should be accompanied with the standardization process of the image. We developed an algorithm to standardize images and to determine the optimal gray level threshold, using a myocardial fibrosis model. Sirius red staining was more convenient for the image analysis than Masson's trichrome staining because of a better contrast with the surrounding structures. To get an optimal measurement, light intensity was standardized at each of the fibrosis, myocardium and background. In this study, the most promising method to determine the degree of fibrosis was that of revising the background without tissue to a gray level of 200, obtaining a green component of the color image, revising the myocardial fiber to 163, and defining a partial ratio as fibrosis index when the gray level threshold was 120. These threshold levels and parameters were determined after drawing the binarization index curves according to the change of the gray level threshold and by the morphological examination of the actual binarization figures overlaid to the original color image. Through these processes we could get a consistent result on the myocardial fibrosis and we expect a similar principle applies when we analyze color images in the histopathologic quantitation by computerized image analysis.

Quality Assurance of Frozen Section Diagnosis An analysis of 5,273 consecutive cases .: Sang Yong Song, Geunghwan Ahn; Korean J Pathol. 1999;33(12):1182-1190.

1,709 View
27 Download

Abstract PDF: Quality assurance analysis of frozen section diagnosis is very important for the pathologists to improve the diagnostic ability and the quality of medical service. We analysed 5,273 consecutive cases of frozen section diagnosis which were done in Samsung Medical Center during 10 months from June 1, 1998 to March 31. 1999 with special reference to the discordance between frozen section diagnosis and final diagnosis. The concordance rate was 97.65%, discordance rate 1.34%, and deferred diagnosis (type 1) rate 1.01%. Category A (discordant diagnosis without any effect on the patients) was 53 cases (1.01%), category B (discordant diagnosis with minimal but no serious effect on the patients) was 10 cases (0.19%), and category C (discordant diagnosis with serious effect on the patients) was 8 cases (0.15%). Type 2 (discordant diagnosis by extra-pathologist problem) was 22 cases (0.42%) and type 3 (discordant diagnosis by pathologist problem) was 49 cases (0.93%). The most frequent causes of type 2 and 3 discordant diagnosis were presence of new lesions on deeper sections and the misinterpretation of lesions. Discordant diagnosis was noted in lymphoreticular system, central nervous system, thyroid, gastric resection margin, breast, female genital organs, intestine, hepatobiliary system, upper aerodigestive tract, urinary tract, lung, and soft tissue in descending order of frequency. Frozen section diagnosis was deferred in central nervous system, lymphoreticular system, gastric resection margin, female genital organs, thyroid, intestine, upper aerodigestive tract, lung, and soft tissue in descending order of frequency. The most important cause of discordant diagnosis was a misinterpretation of the lesions. Based on our results, a continuous and careful follow-up of quality assurance analysis of frozen section diagnosis and a share of experience of problematic cases are mandatory for the pathologists to improve the quality of medical services.

First
Prev
Page of 2
Next
Last

Search