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Song HH, Park H, Cho D, Bang HI, Oh HJ, Kim J. Optimization of a Protocol for Isolating Cell-free DNA From Cerebrospinal Fluid. Ann Lab Med 2024; 44:294-298. [PMID: 38151854 PMCID: PMC10813833 DOI: 10.3343/alm.2023.0267] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 11/01/2023] [Accepted: 12/08/2023] [Indexed: 12/29/2023] Open
Abstract
A standardized protocol for the isolation of cell-free DNA (cfDNA) from cerebrospinal fluid (CSF) is lacking. Therefore, we established a cfDNA isolation protocol optimized for clinical CSF specimens, integrating acceptable modifications and using artificial CSF generated from remnant CSF spiked with reference cell-free tumor DNA (ctDNA). We compared the isolation yields of in vitro diagnostic (IVD)-certified column-based (CB) and magnetic bead-based (MB) isolation. Furthermore, we modified both methods, including pre- and post-elution steps. To confirm ctDNA integrity and quantify the variant allele frequency after isolation, we performed droplet digital PCR (ddPCR) targeting IDH1 R132C in the reference ctDNA. MB isolation had a higher yield than CB isolation (P<0.0001), and post-isolation vacuum increased the final concentration in both methods, with little effect on cfDNA integrity. Our study provides a protocol to maximize CSF-ctDNA concentrations in IVD testing and future studies.
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Affiliation(s)
- Ho Hyun Song
- Department of Interdisciplinary Program in Biomedical Science, Graduate School, Soonchunhyang University, Asan, Korea
| | - Hyeran Park
- Department of Neurosurgery, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Doohwan Cho
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Hyuk-Jin Oh
- Department of Neurosurgery, Soonchunhyang University Cheonan Hospital, Cheonan, Korea
| | - Jieun Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
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2
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Bang HI, Lee JY, Kim HY, Shin S, Nam MH, Kim IS, Kim JM, Yoon JH, Shin MG, Hwang SM, Kong SY. Coagulation Testing in Real-World Setting: Insights From a Comprehensive Survey. Clin Appl Thromb Hemost 2024; 30:10760296241228239. [PMID: 38321776 PMCID: PMC10851719 DOI: 10.1177/10760296241228239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 12/18/2023] [Accepted: 01/07/2024] [Indexed: 02/08/2024] Open
Abstract
The objective of this survey was to gain a real-world perspective on coagulation testing by evaluating the availability of various coagulation laboratory tests, assessing specific analytic and postanalytic steps in clinical laboratories in Korea.Participants were surveyed using a 65-question questionnaire specifically focused on their coagulation testing practices related to prothrombin time (PT), activated partial thromboplastin time (aPTT), plasma-mixing studies, lupus anticoagulant (LA) tests, platelet function tests, coagulation factor assays, and the composition of hemostasis and thrombosis test panels. The survey was performed between July and September 2022.The survey achieved a 77.9% (81 of 104) response rate. PT or aPTT tests were performed directly at all participating institutions, followed by D-dimer and fibrinogen tests, platelet function test, and plasma-mixing studies in order of frequency. Variations existed in the performance of mixing test and LA assessment. Patterns of coagulating testing differed depending on the size of the hospital. The survey revealed that most laboratories conducted coagulation tests following the international guidelines such as Clinical Laboratory Standards Institute guidelines and the Korean Laboratory Certification system. However, some coagulation tests, including mixing test and LA tests, are yet to be standardized in Korea.Continuous education on coagulation test methods and internal and external quality control are required to encourage laboratories to enhance the performance of coagulation testing.
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Affiliation(s)
- Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, The Republic of Korea
| | - Ja Young Lee
- Department of Laboratory Medicine, Inje University Busan Paik Hospital, Busan, The Republic of Korea
| | - Hyun-Young Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, The Republic of Korea
| | - Saeam Shin
- Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, The Republic of Korea
| | - Myung Hyun Nam
- Department of Laboratory Medicine, Korea University Anam Hospital, Seoul, The Republic of Korea
| | - In-Suk Kim
- Department of Laboratory Medicine, Pusan National University Yangsan Hospital, Yangsan, The Republic of Korea
| | - Ji Myung Kim
- Department of Laboratory Medicine, Chungnam National University College of Medicine, Daejeon, The Republic of Korea
| | - Jong-Hyun Yoon
- Department of Laboratory Medicine, Seoul National University Boramae Medical Center, Seoul, The Republic of Korea
| | - Myung-Geun Shin
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital, Hwasun, The Republic of Korea
| | - Sang Mee Hwang
- Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, The Republic of Korea
| | - Sun-Young Kong
- Department of Laboratory Medicine, National Cancer Center Hospital, Goyang, The Republic of Korea
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3
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Bang HI, Choi S, Seo M, Park MY, Im HY. Identification of a novel HLA-B allele, HLA-B*54:47, in a Korean individual. HLA 2023; 102:758-760. [PMID: 37749977 DOI: 10.1111/tan.15230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 09/11/2023] [Accepted: 09/13/2023] [Indexed: 09/27/2023]
Abstract
B*54:47 allele differs from B*54:01:01:01 in codon 74 in exon 2.
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Affiliation(s)
- Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Sooin Choi
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Miyeon Seo
- Department of Laboratory Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Moo-Yong Park
- Division of Nephrology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
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4
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Choi S, Bang HI, Chae S, Young IH, Kim JA. The new HLA-DQA1*03:50Q allele discovered by next-generation sequencing in a Korean family. HLA 2023; 102:770-772. [PMID: 37608499 DOI: 10.1111/tan.15210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 08/11/2023] [Accepted: 08/15/2023] [Indexed: 08/24/2023]
Abstract
DQA1*03:50Q differs from DQA1*03:02:01:01 by a three-nucleotide insertion at gDNA position 3968 in exon 2.
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Affiliation(s)
- Sooin Choi
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
| | - Soobin Chae
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea
| | - Im Hwa Young
- Division of Field Application Specialist, Dow Biomedica Inc., Seoul, Republic of Korea
| | - Jung-Ah Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
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5
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Park S, Kim YH, Bang HI, Park Y. Sample size calculation in clinical trial using R. J Minim Invasive Surg 2023; 26:9-18. [PMID: 36936043 PMCID: PMC10020745 DOI: 10.7602/jmis.2023.26.1.9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/12/2023] [Accepted: 03/12/2023] [Indexed: 03/18/2023]
Abstract
Since the era of evidence-based medicine, it has become a matter of course to use statistics to create objective evidence in clinical research. As an extension of this, it has become essential in clinical research to calculate the correct sample size to demonstrate a clinically significant difference before starting the study. Also, because sample size calculation methods vary from study design to study design, there is no formula for sample size calculation that applies to all designs. It is very important for us to understand this. In this review, each sample size calculation method suitable for various study designs was introduced using the R program (R Foundation for Statistical Computing). In order for clinical researchers to directly utilize it according to future research, we presented practice codes, output results, and interpretation of results for each situation.
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Affiliation(s)
- Suyeon Park
- Department of Biostatistics, Academic Research Office, Soonchunhyang University Seoul Hospital, Seoul, Korea
- International Development and Cooperation, Graduate School of Multidisciplinary Studies Toward Future, Soonchunhyang University, Asan, Korea
- Department of Applied Statistics, Chung-Ang University, Seoul, Korea
| | - Yeong-Haw Kim
- Department of Applied Statistics, Chung-Ang University, Seoul, Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
- Corresponding author Hae In Bang, Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, 59 Daesagwan-ro, Yongsan-gu, Seoul 04401, Korea, E-mail: , ORCID: https://orcid.org/0000-0001-7854-3011
| | - Youngho Park
- Department of Big Data Application, College of Smart Interdisciplinary Engineering, Hannam University, Daejeon, Korea
- Youngho Park, Department of Big Data Application, College of Smart Interdisciplinary Engineering, Hannam University, 70 Hannamro, Daedeok-gu, Daejeon 34430, Korea, E-mail: , ORCID: https://orcid.org/0000-0002-7096-3967
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6
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Kim JA, Bang HI, Shin JW, Park Y, Kim S, Kim MY, Jang EY, Shin WY, Kim J, Park R, Choi TY. Immunogenicity of Third-dose BNT162b2 mRNA Vaccine Following Two Doses of ChAdOx1 in Health Care Workers: A Prospective Longitudinal Study. Ann Lab Med 2022; 42:688-692. [PMID: 35765878 PMCID: PMC9277035 DOI: 10.3343/alm.2022.42.6.688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/24/2022] [Accepted: 06/07/2022] [Indexed: 11/19/2022] Open
Abstract
Following the original severe acute respiratory syndrome coronavirus 2 strain (Wuhan-Hu-1) in December 2019, the Delta variant in May 2021 and the Omicron variant in December 2021 were classified as variants of concern. The pandemic has been ongoing for more than two years, and the three-dose vaccination rate has reached approximately 50% in Korea. We analyzed anti-S antibodies (Abs) and neutralizing Abs (NAbs) in 32 healthcare workers at a university hospital, focusing on the first to third doses of ChAdOx1-ChAdOx1-BNT162b2, which is the most common vaccination regimen in Korea. Antibodies were analyzed at eight time points according to the vaccine regimen. The first to third doses of ChAdOx1-ChAdOx1-BNT162b2 produced high Ab concentrations; NAb concentrations after the third dose were predicted to remain high for a longer period than those after the first and second doses. The effectiveness of a second dose of ChAdOx1 in the real world was demonstrated by analyzing samples collected during an outbreak that occurred in the study period, 4-5 months after the second dose. The relative risk ratio was 88.0%, and the efficacy of the second ChAdOx1 dose was 12.0% (P<0.05). Therefore, maintaining appropriate Ab concentrations through regular vaccination will help protect against coronavirus disease-19.
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Affiliation(s)
- Jung-Ah Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Jeong Won Shin
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Yoonhye Park
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Saerom Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Mi-Young Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Eui Young Jang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Woo Yong Shin
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Jieun Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Rojin Park
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Tae Youn Choi
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
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7
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Shin WY, Kim JA, Yoon SY, Bang HI, Won JH, Song HH, Kim J, Park R. Co-existence of a novel translocation t(11;22)(q23;q12.1) with PML-RARA in acute promyelocytic leukemia: a case report. Ann Hematol 2022; 101:2369-2371. [PMID: 35780252 DOI: 10.1007/s00277-022-04911-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 06/27/2022] [Indexed: 11/25/2022]
MESH Headings
- Chromosomes, Human, Pair 15/genetics
- Chromosomes, Human, Pair 17/genetics
- Humans
- Leukemia, Promyelocytic, Acute/drug therapy
- Leukemia, Promyelocytic, Acute/genetics
- Oncogene Proteins, Fusion/genetics
- Promyelocytic Leukemia Protein
- Translocation, Genetic
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Affiliation(s)
- Woo Yong Shin
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, 59 Daesaqwan-ro, Yongsan-gu, Seoul, 04401, Republic of Korea
| | - Jung-Ah Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, 59 Daesaqwan-ro, Yongsan-gu, Seoul, 04401, Republic of Korea
| | - Seug Yun Yoon
- Division of Hematology and Oncology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, 59 Daesaqwan-ro, Yongsan-gu, Seoul, 04401, Republic of Korea
| | - Jong-Ho Won
- Division of Hematology and Oncology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
| | - Ho Hyun Song
- Department of Interdisciplinary Program in Biomedical Science, Graduate School, Soonchunhyang University, Asan, Chungcheongnam-do, Republic of Korea
| | - Jieun Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, 59 Daesaqwan-ro, Yongsan-gu, Seoul, 04401, Republic of Korea.
| | - Rojin Park
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, 59 Daesaqwan-ro, Yongsan-gu, Seoul, 04401, Republic of Korea
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8
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Kim JA, Shin WY, Kim J, Bang HI, Yoon SY, Park R. A rare case of primary plasma cell leukemia exhibiting the small-cell variant of plasma cells. Blood Res 2022; 57:161-164. [PMID: 35620908 PMCID: PMC9242829 DOI: 10.5045/br.2022.2022059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/12/2022] [Accepted: 04/18/2022] [Indexed: 11/23/2022] Open
Affiliation(s)
- Jung-Ah Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Woo Yong Shin
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Jieun Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Seug Yun Yoon
- Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Rojin Park
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
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9
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Shin WY, Bang HI, Kim JA, Kim J, Park R. Angioimmunoblastic T-Cell Lymphoma with Polyclonal Proliferation of Plasma Cells: A Cautionary Note for Flow Cytometry Interpretations. Korean J Clin Lab Sci 2022. [DOI: 10.15324/kjcls.2022.54.1.68] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Woo Yong Shin
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Jung-Ah Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Jieun Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Rojin Park
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
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10
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Shin WY, Yoon SY, Park R, Kim JA, Song HH, Bang HI, Won JH, Kim J. A novel bi-alleleic DDX41 mutations in B-cell lymphoblastic leukemia: case report. BMC Med Genomics 2022; 15:46. [PMID: 35246110 PMCID: PMC8897883 DOI: 10.1186/s12920-022-01191-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 02/22/2022] [Indexed: 11/10/2022] Open
Abstract
Background The germline mutations of DDX41, also known as DEAD box RNA helicase 41, have been found in about 1.5% of myeloid neoplasms (MNs). Development of MDS/AML is relatively common in germline DDX41 mutations. However, a variety of hematological malignancies (HMs) have been reported. Case presentation We report a novel case of bi-alleleic DDX41 mutations in B-cell lymphoblastic leukemia (B-ALL), with unusual location of DDX41 mutations. The gene expression profile (GEP) of Ph + B-ALL with bi-alleleic DDX41 mutations showed heterogeneously transitional GEP and altered gene expression levels of genes involved in the process essential for red blood cells and myeloid cell differentiation were noted. Conclusions We report that DDX41 mutations are unusual but can be an underlying event in Ph + B-ALL and screening DDX41 mutations can be also informative for patients awaiting for haploidentical stem cell transplantation and choosing the therapy. Supplementary Information The online version contains supplementary material available at 10.1186/s12920-022-01191-2.
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Affiliation(s)
- Woo Yong Shin
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Seug Yun Yoon
- Division of Hematology and Oncology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Rojin Park
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Jung-Ah Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Ho Hyun Song
- Department of Interdisciplinary Program in Biomedical Science, Graduate School, Soonchunhyang University, Asan, Chungcheongnam-do, Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Jong-Ho Won
- Division of Hematology and Oncology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Jieun Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.
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11
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Kim JA, Shin WY, Kim J, Bang HI, Yoon SY, Won JH, Park R. A Case of Acute Myeloid Leukemia With inv(16)(p13.1q22);C BFB-MYH11 Presenting With Faggot Cells. Ann Lab Med 2021; 41:333-335. [PMID: 33303720 PMCID: PMC7748095 DOI: 10.3343/alm.2021.41.3.333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/02/2020] [Accepted: 11/17/2020] [Indexed: 11/19/2022] Open
Affiliation(s)
- Jung-Ah Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Woo Yong Shin
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Jieun Kim
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Seug Yun Yoon
- Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Jong-Ho Won
- Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Rojin Park
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
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12
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Bang HI, Choi IH, Park R. Bone Marrow Gouty Tophi With Plasma Cell Myeloma. Ann Lab Med 2021; 40:414-416. [PMID: 32311855 PMCID: PMC7169628 DOI: 10.3343/alm.2020.40.5.414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/23/2019] [Accepted: 03/20/2020] [Indexed: 11/23/2022] Open
Affiliation(s)
- Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - In Ho Choi
- Department of Pathology, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Rojin Park
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
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Abstract
INTRODUCTION Peripheral T cell lymphoma, not otherwise specified (PTCL-NOS) is a heterogeneous group of mature T cell lymphomas which do not correspond to any specific subtype of mature T-cell lymphoma in current classifications. Some researchers have suggested that PTCL with low Ki-67 labeling index should be classified as indolent PTCL PATIENT CONCERNS:: A 58-year old man diagnosed with alcoholic fatty liver 3 months prior complained of tenesmus and abdominal distension. Colonoscopy of the small and large intestines revealed multiple polyps, which were histologically diagnosed as lymphoid hyperplasia. One month later, he re-visited with a weight loss of 3 to 4 kg over 2 months. Radiologic examination revealed numerous small, homogenous, hypovascular lymph node enlargement in the para-aortic, mesenteric, and both inguinal areas, suggesting malignant lymphoma. DIAGNOSIS Laparoscopic biopsy of an omental lymph node was performed, which was histologically confirmed as PTCL-NOS. INTERVENTIONS The patient was administered 3 cycles of cyclophosphamide, doxorubicin, vincristine, and prednisone, but his general condition did not improve. Therefore, treatment was changed to ifosfamide, carboplatin, and etoposide -dexamethasone (4 cycles) followed by allogeneic stem cell transplantation. OUTCOME Even after allogeneic stem cell transplantation, fluorodeoxyglucose uptake in his abdominal lymph nodes and small bowel in positron emission tomography- computed tomography persisted at a Deauville score of 4. The patient has been followed-up for 2 years without progression. CONCLUSION These indolent PTCLs histologically show diffuse infiltrated small lymphoid cells with low KI-67 labeling index and have a relatively good prognosis, although the epidemiology and pathogenesis are not fully elucidated. We report a case of indolent PTCL with cytogenetic abnormalities and poor response to chemotherapy, along with a brief review of the literature.
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Affiliation(s)
- Jisoo Lee
- Soonchunhyang University College of Medicine
| | | | - Kyoung Ha Kim
- Division of Hematology and Oncology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital
| | - Seug Yun Yoon
- Division of Hematology and Oncology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital
| | - In Ho Choi
- Department of Pathology, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
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Jung H, Bang HI, Choi TY. Evaluation of the Effectiveness of a Re-decontaminating Process with Bacterial Contaminated Specimens Showing a Positive MGIT Signal for the Detection of Mycobacteria. Korean J Clin Lab Sci 2019. [DOI: 10.15324/kjcls.2019.51.2.171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Haeyong Jung
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Tae Youn Choi
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
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15
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Park SY, Yu SN, Lee EJ, Kim T, Jeon MH, Choo EJ, Park S, Chae JW, In Bang H, Kim TH. Monomicrobial gram-negative necrotizing fasciitis: An uncommon but fatal syndrome. Diagn Microbiol Infect Dis 2019; 94:183-187. [PMID: 30713116 DOI: 10.1016/j.diagmicrobio.2018.12.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Revised: 12/17/2018] [Accepted: 12/26/2018] [Indexed: 12/20/2022]
Abstract
This study aimed to characterize patients with monomicrobial gram-negative necrotizing fasciitis in three university hospitals in Korea. In this study, of the 115 patients with community-acquired necrotizing fasciitis, 67 (58%) had monomicrobial infections: 31 (27%) in the gram-negative group and 36 (31%) in the gram-positive group. The majority of patients in the gram-negative group were infected with Escherichia coli followed by Klebsiella pneumoniae and Vibrio vulnificus. More patients in the gram-negative group showed liver cirrhosis than those in the gram-positive group (39% vs. 14%, P = 0.02). In a multivariable logistic regression analysis, liver cirrhosis (adjusted odds ratio [aOR], 13.7; 95% confidence interval [CI], 2.9-67.0), treatment with antibiotics without surgery (aOR, 10.2; 95% CI, 2.1-48.3), and lower level of albumin (aOR 4.9; 95% CI, 1.6-14.9) were associated with 30-day mortality. Our findings suggest that gram-negative necrotizing fasciitis is more often associated with liver cirrhosis and has poorer outcomes than gram-positive necrotizing fasciitis.
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Affiliation(s)
- Se Yoon Park
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
| | - Shi Nae Yu
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Cheonan Hospital, Cheonan, Republic of Korea
| | - Eun Jung Lee
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
| | - Tark Kim
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Min Hyok Jeon
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Cheonan Hospital, Cheonan, Republic of Korea
| | - Eun Ju Choo
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Republic of Korea
| | - Suyeon Park
- Department of Biostatistics, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea
| | - Joon Won Chae
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea
| | - Tae Hyong Kim
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Republic of Korea.
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Park SY, Yu SN, Lee EJ, Kim T, Jeon MH, Choo EJ, Park S, Bang HI, Han J, Park J, Kim TH. 2371. Monomicrobial Gram-Negative Necrotizing Fasciitis: An Uncommon but Fatal Syndrome. Open Forum Infect Dis 2018. [PMCID: PMC6253981 DOI: 10.1093/ofid/ofy210.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background Necrotizing fasciitis is a rapid progressive and potentially life-threatening infection. Although the relative emergence of non-synergistic single Gram-negative organisms as pathogen could be a therapeutic issue for clinicians, limited studies so far described the characteristics due to the low incidence. Methods We retrospectively reviewed clinical data of necrotizing fasciitis patients who were clinically diagnosed between May 2001 and December 2015 in university hospitals of three different cities of the Republic of Korea. We compared clinical characteristics and outcomes of patients with monomicrobial Gram-negative with those of the Gram-positive counterpart. Results A total of 115 patients with community acquired necrotizing fasciitis were identified. Among them, monomicrobial infections were 67 (58%) cases: 31 (27%) in the Gram-negative group and 36 (31%) in the Gram-positive group. The majority of Gram-negative group was E. coli followed by K. pneumonia and V. vulnificus. There were more cases of the Gram-negative group showing liver cirrhosis (39% vs. 14%, P = 0.02) and bacteremia (52% vs. 16%, P = 0.02). A total of 23 (10%) patients died within 30 days, including 15 (19%) in the Gram-negative group and 8 (10%) in the Gram-positive group (P = 0.02). In multivariable logistic regression, liver cirrhosis (adjusted odds ratio [aOR], 13.7; 95% confidence interval [CI], 2.9–67.0), treatment with antibiotics without surgery (aOR, 10.2; 95% CI, 2.1–48.3), and lower level of albumin (aOR 4.9; 95% CI, 1.6–14.9) were significantly associated with 30-day mortality. Conclusion Our findings suggest that necrotizing fasciitis caused by Gram-negative pathogen more often associated with liver cirrhosis and has poorer outcomes than the Gram-positive counterpart. Disclosures All authors: No reported disclosures.
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Affiliation(s)
- Se Yoon Park
- Department of Infectious Diseases, Soonchunhyang University Seoul Hospital, Seoul, Korea, Republic of (South)
| | - Shi Nae Yu
- Division of Infectious Diseases, Soonchunhyang University Cheonan Hospital, Cheonan, Korea, Republic of (South)
| | - Eun Jung Lee
- Infectious Diseases, SoonChunHyang University Hospital, Seoul, Korea, Republic of (South)
| | - Tark Kim
- Division of Infectious Diseases, Soonchunhyang University Bucheon Hospital, Bucheon, Korea, Republic of (South)
| | - Min Hyok Jeon
- Division of Infectious Diseases, Soonchunhyang University Cheonan Hospital, Cheonan, Korea, Republic of (South)
| | - Eun Ju Choo
- Division of Infectious Diseases, Soonchunhyang University Bucheon Hospital, Bucheon, Korea, Republic of (South)
| | - Suyeon Park
- Department of Biostatistics, Soonchunhyang University Seoul Hospital, Seoul, Korea, Republic of (South)
| | - Hae In Bang
- Department of Laboratory Medicine, SoonchunhyangUniversity Seoul Hospital, Seoul, Korea, Republic of (South)
| | - Jaijun Han
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea, Republic of (South)
| | - Jebyung Park
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea, Republic of (South)
| | - Tae Hyong Kim
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea, Republic of (South)
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Jung H, Aum SS, Kim MY, Bang HI, Choi TY. Evaluation of the Usefulness of the Decontamination-Reprocessing in Liquid Medium for Recovery of Mycobacteria. Am J Clin Pathol 2018. [DOI: 10.1093/ajcp/aqy101.307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bang HI, Jang MA, Lee YW. Evaluation of the Triage TOX Drug Screen Assay for Detection of 11 Drugs of Abuse and Therapeutic Drugs. Ann Lab Med 2018; 37:522-525. [PMID: 28840991 PMCID: PMC5587826 DOI: 10.3343/alm.2017.37.6.522] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 03/02/2017] [Accepted: 06/25/2017] [Indexed: 11/27/2022] Open
Abstract
The demand for rapid and broad clinical toxicology screens is on the rise. Recently, a new rapid toxicology screening test, the Triage TOX Drug Screen (Alere Inc., USA), which can simultaneously detect 11 drugs of abuse and therapeutic drugs with an instrument-read cartridge, was developed. In the present study, we evaluated the efficacy of this new on-site immunoassay using 105 urine specimens; the results were compared with those obtained by using ultra-performance liquid chromatography with tandem mass spectrometry (UPLC-TMS). Precision was evaluated according to the CLSI EP12-A2 for analyte concentrations near the cutoff, including C50 and±30% of C50, for each drug using standard materials. The C50 specimens yielded 35–65% positive results and the ±30% concentration range of all evaluated drugs encompassed the C5–C95 interval. The overall percent agreement of the Triage TOX Drug Screen was 92.4–100% compared with UPLC-TMS; however, the Triage TOX Drug Screen results showed some discordant cases including acetaminophen, amphetamine, benzodiazepine, opiates, and tricyclic antidepressants. The overall performance of the Triage TOX Drug Screen assay was comparable to that of UPLC-TMS for screening of drug intoxication in hospitals. This assay could constitute a useful screening method for drugs of abuse and therapeutic drugs in urine.
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Affiliation(s)
- Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Mi Ae Jang
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Yong Wha Lee
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea.
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Park SJ, Jang JY, Jeong SW, Cho YK, Lee SH, Kim SG, Cha SW, Kim YS, Cho YD, Kim HS, Kim BS, Park S, Bang HI. Usefulness of AFP, AFP-L3, and PIVKA-II, and their combinations in diagnosing hepatocellular carcinoma. Medicine (Baltimore) 2017; 96:e5811. [PMID: 28296720 PMCID: PMC5369875 DOI: 10.1097/md.0000000000005811] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Alpha-fetoprotein (AFP), Lens culinaris-agglutinin-reactive fraction of AFP (AFP-L3), and protein induced by vitamin K absence or antagonist-II (PIVKA-II) are widely used as tumor markers for the diagnosis of hepatocellular carcinoma (HCC). This study compared the diagnostic values of AFP, AFP-L3, and PIVKA-II individually and in combination to find the best biomarker or biomarker panel.Seventy-nine patients with newly diagnosed HCC and 77 non-HCC control patients with liver cirrhosis were enrolled. AFP, AFP-L3, and PIVKA-II were measured in the same serum samples using microchip capillary electrophoresis and a liquid-phase binding assay on an automatic analyzer. Receiver-operating characteristic curve analyses were also applied to all combinations of the markers.When the 3 biomarkers were analyzed individually, AFP showed the largest area under the receiver-operating characteristic curve (AUC) (0.751). For combinations of the biomarkers, the AUC was highest (0.765) for "PIVKA-II > 40 mAU/mL and AFP > 10 ng/mL." The combination of "PIVKA-II > 40 mAU/mL and AFP > 10 ng/mL and AFP-L3 > 10%" had worse sensitivity and lower AUC (P = 0.001). The highest AUC of a single biomarker was highest for AFP and of a combination was "PIVKA-II > 40 mAU/mL and AFP > 10 ng/mL," with this also being the case when the cut-off value of AFP and AFP-L3 was changed.Alpha-fetoprotein showed the best diagnostic performance as a single biomarker for HCC. The diagnostic value of AFP was improved by combining it with PIVKA-II, but adding AFP-L3 did not contribute to the ability to distinguish between HCC and non-HCC liver cirrhosis. These findings were not altered when the cut-off value of AFP and AFP-L3 was changed.
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Affiliation(s)
- Sang Joon Park
- Institute for Digestive Research, Digestive Disease Center, Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul
| | - Jae Young Jang
- Institute for Digestive Research, Digestive Disease Center, Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul
| | - Soung Won Jeong
- Institute for Digestive Research, Digestive Disease Center, Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul
| | - Young Kyu Cho
- Institute for Digestive Research, Digestive Disease Center, Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul
| | - Sae Hwan Lee
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Cheonan
| | - Sang Gyune Kim
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Bucheon
| | - Sang-Woo Cha
- Institute for Digestive Research, Digestive Disease Center, Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul
| | - Young Seok Kim
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Bucheon
| | - Young Deok Cho
- Institute for Digestive Research, Digestive Disease Center, Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul
| | - Hong Soo Kim
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Cheonan
| | - Boo Sung Kim
- Institute for Digestive Research, Digestive Disease Center, Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul
| | | | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University, Seoul, Republic of Korea
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Yun SG, Shin JW, Park ES, Bang HI, Kang JG. Efficiency of an automated reception and turnaround time management system for the phlebotomy room. Ann Lab Med 2017; 36:49-54. [PMID: 26522759 PMCID: PMC4697343 DOI: 10.3343/alm.2016.36.1.49] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 03/31/2015] [Accepted: 09/08/2015] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Recent advances in laboratory information systems have largely been focused on automation. However, the phlebotomy services have not been completely automated. To address this issue, we introduced an automated reception and turnaround time (TAT) management system, for the first time in Korea, whereby the patient's information is transmitted directly to the actual phlebotomy site and the TAT for each phlebotomy step can be monitored at a glance. METHODS The GNT5 system (Energium Co., Ltd., Korea) was installed in June 2013. The automated reception and TAT management system has been in operation since February 2014. Integration of the automated reception machine with the GNT5 allowed for direct transmission of laboratory order information to the GNT5 without involving any manual reception step. We used the mean TAT from reception to actual phlebotomy as the parameter for evaluating the efficiency of our system. RESULTS Mean TAT decreased from 5:45 min to 2:42 min after operationalization of the system. The mean number of patients in queue decreased from 2.9 to 1.0. Further, the number of cases taking more than five minutes from reception to phlebotomy, defined as the defect rate, decreased from 20.1% to 9.7%. CONCLUSIONS The use of automated reception and TAT management system was associated with a decrease of overall TAT and an improved workflow at the phlebotomy room.
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Affiliation(s)
- Soon Gyu Yun
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea.,Department of Laboratory Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Jeong Won Shin
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea.
| | - Eun Su Park
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Jung Gu Kang
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
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21
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Lee J, Rhee M, Min TK, Bang HI, Jang MA, Kang ES, Kim HJ, Yang HJ, Pyun BY. A novel BTK gene mutation, c.82delC (p.Arg28 Alafs *5), in a Korean family with X-linked agammaglobulinemia. Korean J Pediatr 2016; 59:S49-S52. [PMID: 28018445 PMCID: PMC5177711 DOI: 10.3345/kjp.2016.59.11.s49] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 10/23/2014] [Accepted: 10/28/2014] [Indexed: 11/27/2022]
Abstract
X-linked agammaglobulinemia (XLA) is a hereditary humoral immunodeficiency that results from Bruton’s tyrosine kinase (BTK) gene mutations. These mutations cause defects in B-cell development, resulting in the virtual absence of these lymphocytes from the peripheral circulation. Consequently, this absence leads to a profound deficiency of lg all isotypes, and an increased susceptibility to encapsulated bacterial infections. A 15-month-old Korean boy presented with recurrent sinusitis and otitis media after 6 months of age, and had a family history of 2 maternal uncles with XLA. Laboratory tests revealed a profound deficiency of Ig isotypes, and a decreased count of CD19+ B cells in the peripheral circulation. Based on his family history and our laboratory test results, he was diagnosed with XLA. We performed BTK gene analysis of peripheral blood samples obtained from family members to confirm the diagnosis. Mutational analysis revealed a novel hemizygous frameshift mutation (c.82delC, p.Arg28Alafs*5), in the BTK gene. His mother and maternal grandmother were heterozygous carriers of this mutation and his two maternal uncles were hemizygous at the same position. After XLA diagnosis, intravenous immunoglobulin (400 mg/kg, monthly) treatment was initiated; recurrent sinusitis and otitis media were subsequently brought under control. To our knowledge, this is the first reported case of a Korean pedigree with a novel mutation in the BTK gene.
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Affiliation(s)
- Jeongeun Lee
- Department of Pediatrics, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.; Pediatric Allergy and Respiratory Center, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Minhee Rhee
- Department of Pediatrics, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.; Pediatric Allergy and Respiratory Center, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Taek Ki Min
- Department of Pediatrics, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.; Pediatric Allergy and Respiratory Center, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Mi-Ae Jang
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Eun-Suk Kang
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hyeon-Jong Yang
- Department of Pediatrics, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.; Pediatric Allergy and Respiratory Center, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Bok Yang Pyun
- Department of Pediatrics, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea.; Pediatric Allergy and Respiratory Center, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
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Bang HI, Park R, Park ES, Choi IH, Kim KH, Shin JW, Choi TY, Han K, Won JH. De novo leukemic variant of mast cell leukemia with KIT D816V. Ann Lab Med 2015; 35:260-2. [PMID: 25729733 PMCID: PMC4330181 DOI: 10.3343/alm.2015.35.2.260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 09/30/2014] [Accepted: 12/29/2014] [Indexed: 11/19/2022] Open
Affiliation(s)
- Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Rojin Park
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Eun Su Park
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - In Ho Choi
- Department of Pathology, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Kyoung Ha Kim
- Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Jeong Won Shin
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Tae Youn Choi
- Department of Laboratory Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Kyungja Han
- Department of Laboratory Medicine, The Catholic University College of Medicine, Seoul, Korea
| | - Jong-Ho Won
- Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
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Bang HI, Lim HM, Jang EY, Park ES, Lee EJ, Kim TH, Park R, Shin JW, Choi TY. Activities of Quality Improvement for Blood Culture at a University Hospital. Ann Clin Microbiol 2015. [DOI: 10.5145/acm.2015.18.3.88] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Hyun Mi Lim
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Eui Young Jang
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Eun Su Park
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Eun Jung Lee
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Tae Hyong Kim
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Rojin Park
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Jeong Won Shin
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Tae Youn Choi
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
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Park ES, Jo KI, Shin JW, Park R, Choi TY, Bang HI, Chai GR, Yun SG. Comparison of total and IgG ABO antibody titers in healthy individuals by using tube and column agglutination techniques. Ann Lab Med 2014; 34:223-9. [PMID: 24790910 PMCID: PMC3999321 DOI: 10.3343/alm.2014.34.3.223] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 10/22/2013] [Accepted: 02/24/2014] [Indexed: 11/19/2022] Open
Abstract
Background Most immune reactions related to transfusion and transplantation are caused by IgM ABO antibodies. However, IgG also plays an important role in these reactions. Therefore, a method to measure antibodies, including IgG, is necessary. We investigated ABO antibody titers of healthy individuals using a column agglutination technique (CAT) with or without dithiothreitol (DTT) and compared them with titers obtained using a conventional tube method. Methods Among healthy adults who underwent a medical examination, 180 individuals (60 with blood group A, 60 with group B, and 60 with group O) were selected. Antibody titrations were performed using the immediate spin (IS) tube, anti-human globulin (AHG) tube, and CAT with or without DTT methods. Results Higher median values of anti-B and anti-A titers in groups A and B individuals, respectively, were obtained using the IS method than using the AHG method. Higher values for group O individuals were obtained using the AHG method. Higher median titers of anti-B and anti-A in group O individuals were obtained using CAT without DTT than using the AHG method. Median titers of anti-B and anti-A in all blood groups were higher in CAT without DTT than in CAT with DTT, especially for group O individuals. Conclusions We recommend CAT with and without DTT for titration of anti-A and anti-B, especially in group O individuals, to provide more sensitive results that include IgG data. Adjustment of insurance coverage of fees associated with antibody titration might be necessary, considering the actual cost of reagents and personnel.
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Affiliation(s)
- Eun Su Park
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Kyung Il Jo
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Jeong Won Shin
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Rojin Park
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Tae Yoon Choi
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Gum Ran Chai
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
| | - Soon Gyu Yun
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea. ; Department of Laboratory Medicine, Kangwon National University School of Medicine, Chuncheon, Korea
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Choi HJ, Bang HI, Ki CS, Lee SY, Kim JW, Song J, Shin MR, Lee YW, Lee DH, Park HD. Two novel FAH gene mutations in a patient with hereditary tyrosinemia type I. Ann Clin Lab Sci 2014; 44:317-323. [PMID: 25117105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Hereditary tyrosinemia type I (HT I) is a severe inborn metabolic disorder affecting the tyrosine degradation pathway. Most untreated patients die within the first two years of life. HT I results from fumarylacetoacetate hydrolase (FAH) deficiency caused by mutations in the FAH gene. The diagnosis of HT I is confirmed by measuring FAH enzyme activity in cultured fibroblasts or liver tissue and/or detecting disease-causing mutations in the FAH gene. METHODS A female neonate was referred to our hospital for further evaluation of an abnormal newborn screening test that showed elevated tyrosine levels. We analyzed amino acids and organic acids in the patient's blood and urine. To identify the genetic abnormality, all the coding exons and flanking introns of the FAH gene were analyzed via PCR. RESULTS A repeat newborn screening test and plasma amino acid analysis revealed increased tyrosine levels in the patient. Urine organic acid analysis showed increased urinary excretion of 4-hydroxyphenyllactate, 4-hydroxyphenylpyruvate, and succinylacetone. Sequence analysis of the FAH gene identified two novel variations (c.536A>G (p.Gln179Arg) and c.913+5G>A) that had not been previously reported and that were not found in 170 healthy controls. CONCLUSIONS HT I was confirmed in this patient by molecular genetic analysis of the FAH gene, with highly suggestive biochemical findings. The novel sequence variations detected in the present study should be considered disease-causing mutations by in silico analysis. In the Korean population, this is the first described case of HT I caused by a point mutation in the FAH gene.
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Affiliation(s)
- Hyun-Jung Choi
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - Hae In Bang
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Seoul Hospital, Seoul
| | - Chang-Seok Ki
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - Soo-Youn Lee
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - Jong-Won Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - Junghan Song
- Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul
| | - Mee-Ran Shin
- Departments of Prosthodontics, Dentistry, Dongtan Sacred Heart Hospital, Graduated school of Clinical Dentistry, Hallym University, Seoul
| | - Yong-Wha Lee
- Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon
| | - Dong Hwan Lee
- Department of Pediatrics, Soonchunhyang University College of Medicine, Seoul, Korea.
| | - Hyung-Doo Park
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
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Bang HI, Choi TY, Shin JW. Comparison of Ogawa Media, BACTEC MGIT 960 System and TB/NTM Real-Time PCR for DetectingMycobacteriumSpecies. Tuberc Respir Dis (Seoul) 2011. [DOI: 10.4046/trd.2011.71.4.249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Tae Youn Choi
- Department of Laboratory Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Jeong Won Shin
- Department of Laboratory Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
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Bang HI, Yoo JY, Kim KH, Park R, Shin JW, Choi TY, Lee SC, Park HS, Won JH. [A case of central nervous system myelomatosis with complex chromosome aberrations]. Korean J Lab Med 2010; 30:334-8. [PMID: 20805703 DOI: 10.3343/kjlm.2010.30.4.334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Involvement of the central nervous system is very uncommon in multiple myeloma, observed in approximately 1% of the multiple myeloma patients. We report a case of central nervous system myelomatosis with complex chromosome aberrations in a 62-yr-old female patient, who had previously been diagnosed as multiple myeloma. Fluorescent in situ hybridization revealed 13q deletion, p53 gene deletion and IGH/FGFR3 rearrangement and chromosomal study showed complex chromosome aberrations. After four cycles of chemotherapy, the patient was admitted to the hematology department with severe headache. Plasma cells were found in the cerebrospinal fluid (CSF), and CSF immunoelectrophoresis revealed abnormal precipitin arcs against anti-IgG and anti-lambda antisera. She was given systemic chemotherapy and eight courses of intrathecal chemotherapy, which cleared plasma cells in the CSF. Two months later, she was given autologous stem cell transplantation. Three months after stem cell transplantation, central nervous system myelomatosis progressed to plasma cell leukemia and two months later, the patient expired.
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Affiliation(s)
- Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University Hospital, Seoul, Korea
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Bang HI, Shin JW, Choi TY, Park R, Shin YJ. Comparison of SD BIOLINE Rapid Influenza Antigen Test Using Two Different Specimens, Nasopharyngeal Swabs and Nasopharyngeal Aspirates. ACTA ACUST UNITED AC 2010. [DOI: 10.5145/kjcm.2010.13.4.147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hae In Bang
- Department of Laboratory Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Jeong Won Shin
- Department of Laboratory Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Tae Youn Choi
- Department of Laboratory Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Rojin Park
- Department of Laboratory Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Yu Jeong Shin
- Department of Laboratory Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
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