Center for Diagnostic Oncology

Goyang, South Korea

Center for Diagnostic Oncology

Goyang, South Korea
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PubMed | Research Institute and Hospital of National Cancer Center, Center for Diagnostic Oncology and Research Institute and Hospital
Type: Journal Article | Journal: Annals of clinical biochemistry | Year: 2016

Anyplex II HPV HR (Anyplex_HR; Seegene, Seoul, Korea) is a new multiplex real-time polymerase chain reaction assay for screening cervical cancer, and it is designed to detect 14 high-risk human papillomaviruses along with all the genotype information in a single tube. The aim of this study was to evaluate the performance of the Anyplex_HR in comparison to that of the Cobas 4800 HPV (Cobas_4800; Roche Molecular Diagnostics, Pleasanton, CA, USA) and the Hybrid capture 2 (HC2; Qiagen GmbH, Hilden, Germany).The performance of the Anyplex_HR for high-risk human papillomavirus genotype detection was prospectively evaluated against that of the HC2 and the Cobas_4800 at the National Cancer Center using 400 cervical samples. All discrepant samples were confirmed by polymerase chain reaction with type-specific primers followed by sequencing.The overall agreement and kappa value of the Anyplex_HR with the Cobas_4800 were 98.0% and 0.96, respectively. The level of agreement between the two assays and the corresponding kappa values for human papillomavirus16, human papillomavirus18 and other high-risk human papillomaviruses were 99.5%, 99.8% and 98.8%, and 0.98, 0.96 and 0.97, respectively. The agreement and kappa value of the HC2 with the Cobas_4800 were 95.3% and 0.91. The human papillomavirus positivity of the Anyplex_HR and the Cobas_4800 in low-grade squamous intraepithelial lesion/high-grade squamous intraepithelial lesion samples demonstrated 100% concordance. Both the Anyplex_HR and the Cobas_4800 showed excellent results in the precision test.The Anyplex_HR is comparable with the Cobas_4800 and the HC2 for human papillomavirus DNA testing, and it may prove more useful for follow-up testing and patient management by providing genotyping information additional to human papillomavirus16 and human papillomavirus18.


Joung J.Y.,Center for Prostate Cancer | Park S.,Yonsei University | Yoon H.,National Cancer Center | Kwon W.-A.,Wonkwang University | And 6 more authors.
Urology | Year: 2013

Objective To confirm the hypothesis that nuclear matrix protein 22 (NMP22) is overestimated in concentrated urine, we compared the NMP22 values measured at different dietary states. Methods We retrospectively reviewed 531 healthy subjects who had had abnormal urinary NMP22 values ≥10 U/mL at the first test and underwent a second NMP22 test within 2 weeks. The first NMP22 test was performed after overnight fasting, and the second was performed with no dietary restrictions. We compared the NMP22 values between the 2 measurements and investigated the relationship between the NMP22 value and urine specific gravity. Results At the second test, 504 subjects (94.9%) had a normal NMP22 value of <10 U/mL and only 27 subjects (5.1%) persistently had an abnormal NMP22 value of ≥10 U/mL. Both NMP22 and urine specific gravity at the first test were significantly higher than at the second test (P <.0001). Subjects with an abnormal NMP22 value tended to have a more concentrated urine with a greater urine specific gravity than did the subjects with a normal NMP22 value. This difference was significant in the subgroup undergoing bowel preparation for colonoscopy (P <.001). Conclusion NMP22 will be overestimated in concentrated urine after overnight fasting. When interpreting the NMP22 value, we should consider the overestimation of NMP22 in concentrated urine. © 2013 Elsevier Inc.


PubMed | Center for Diagnostic Oncology, Catholic University of Daegu and National Cancer Control Institute
Type: Journal Article | Journal: Cancer research and treatment : official journal of Korean Cancer Association | Year: 2016

The objective of this study was to measure secondhand smoke (SHS) exposure in personal computer (PC) rooms with the purpose of determining the strength of scientific evidence supporting the legislative ban on smoking in PC rooms located in the Republic of Korea.From June to September 2012, particulate matter (PM2.5) and air nicotine concentration (ANC) were measured in the smoking and non-smoking areas of PC rooms in Goyang City, Korea. In 28 randomly sampled PC rooms, field investigators completed an observational questionnaire on building characteristics, smoking policies, and evidence of smoking. The geometric means (GM) of PM2.5 and ANC in smoking and non-smoking areas were compared.Evidence of smoking was identified in both the smoking and non-smoking areas of all PC rooms. The GMs of PM2.5 and ANC in both areas were high and did not differ significantly (174.77 g/m(3) and 48.95 g/m(3) in smoking areas; 93.38 g/m(3) and 41.30 g/m(3) in non-smoking areas). Overall PM2.5 concentrations were 5.5-fold higher than those listed in the World Health Organization guidelines.This study supported previous reports that a partial smoking ban did not protect individuals from SHS exposure. Furthermore, the results from our study suggest how research can support policy. Countries in which smoke-free policies are not yet comprehensive may find our results useful.


Park S.-J.,MG MED Inc. | Jung E.H.,MG MED Inc. | Ryu R.-S.,MG MED Inc. | Kang H.W.,Macrogen Inc. | And 5 more authors.
Molecular Cytogenetics | Year: 2011

Background: Array comparative genomic hybridization (CGH) is currently the most powerful method for detecting chromosomal alterations in pre and postnatal clinical cases. In this study, we developed a BAC based array CGH analysis platform for detecting whole genome DNA copy number changes including specific micro deletion and duplication chromosomal disorders. Additionally, we report our experience with the clinical implementation of our array CGH analysis platform. Array CGH was performed on 5080 pre and postnatal clinical samples from patients referred with a variety of clinical phenotypes. Results: A total of 4073 prenatal cases (4033 amniotic fluid and 40 chorionic villi specimens) and 1007 postnatal cases (407 peripheral blood and 600 cord blood) were studied with complete concordance between array CGH, karyotype and fluorescence in situ hybridization results. Among 75 positive prenatal cases with DNA copy number variations, 60 had an aneuploidy, seven had a deletion, and eight had a duplication. Among 39 positive postnatal cases samples, five had an aneuploidy, 23 had a deletion, and 11 had a duplication. Conclusions: This study demonstrates the utility of using our newly developed whole-genome array CGH as first-tier test in 5080 pre and postnatal cases. Array CGH has increased the ability to detect segmental deletion and duplication in patients with variable clinical features and is becoming a more powerful tool in pre and postnatal diagnostics. © 2011 Park et al; licensee BioMed Central Ltd.


Hwang S.-H.,Center for Diagnostic Oncology | Jung S.-K.,Center for Diagnostic Oncology | Kang S.-J.,Center for Diagnostic Oncology | Cha H.S.,Center for Clinical Specialty | And 2 more authors.
Annals of Laboratory Medicine | Year: 2013

Background: Documentation is very important; a considerable number of documents exist for use in accreditation inspection. However, most laboratories do not effectively manage the processes of documentation, organization, and storage. The purpose of this study was to facilitate the establishment of a strategically effective and sustainably standardized document management system. Methods: A document code formatting system was modified by comparing the document list data received from 3 major university hospitals. In addition, a questionnaire regarding document code standardization was created and sent to 268 institutes to establish document classifications and generate a standard coding scheme. A computerized document management system was developed. Results: Only 32% (8 out of 25 institutes) answered that they were able to identify all of the document types and their numbers. In total, 76% of institutes (19 out of 25) answered that a systematic document management system was necessary. Disorganized document files were systemized by classifying them into 8 major groups according to their characteristics: patient test records (T), test quality control (Q), manuals (M), equipment and environment management (E), statistics (S), division administration (A), department administration (R), and others (X). Conclusions: Our documentation system may serve as a basis for the standardization of documents and the creation of a document management system for all hospital laboratories. © The Korean Society for Laboratory Medicine.


Kim S.-Y.,Pusan National University | Kim J.-S.,Kyung Hee University | Hwang S.-H.,Center for Diagnostic Oncology | Park H.-K.,Pusan National University | And 4 more authors.
American Journal of Clinical Pathology | Year: 2012

For clinical epidemiologic and proteomic studies, the control of preanalytic variation, including sample processing and storage, is important. We evaluated the stability of progastrin-releasing peptide (ProGRP) as a marker for the quality control of stored serum and plasma samples. The ProGRP from 23 healthy volunteers was measured serially for 8 hours at room temperature, and the results were validated with clinical samples from the biobank. A significant difference in ΔProGRP was also noted between good-quality (time delay <4 hours before storage) and poor-quality (time delay ≥4 hours before storage) specimens (mean ± SD, 0.17 ± 0.08 vs 0.36 ± 0.14; P < .001; Wilcoxon signed-rank test). With a ΔProGRP cutoff of 0.22, the sensitivity and specificity of detection of the poor-quality samples were 85.7% and 75.0%, respectively, in clinical validations. We demonstrated that ΔProGRP could be used as a marker for quality control in sample processing and storage in biobanks. © American Society for Clinical Pathology.


Choi M.,Center for Diagnostic Oncology | Lee Y.,Center for Diagnostic Oncology | Hwang S.H.,Center for Diagnostic Oncology | Lee J.S.,Center for Diagnostic Oncology
Tuberculosis and Respiratory Diseases | Year: 2014

Disease flare-up after discontinuing epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI) has been considered as a critical issue in lung cancer patients who have experienced radiologic progression after showing initial durable response. This is a case of systemic nocardiosis that occurred after chronic steroid use for radionecrosis from stereotactic radiosurgery. It was initially thought as a disease flare-up after stopping EGFR-TKI. Copyright © 2014 The Korean Academy of Tuberculosis and Respiratory Diseases. All rights reserved.


PubMed | Center for Diagnostic Oncology
Type: Comparative Study | Journal: Annals of laboratory medicine | Year: 2013

Documentation is very important; a considerable number of documents exist for use in accreditation inspection. However, most laboratories do not effectively manage the processes of documentation, organization, and storage. The purpose of this study was to facilitate the establishment of a strategically effective and sustainably standardized document management system.A document code formatting system was modified by comparing the document list data received from 3 major university hospitals. In addition, a questionnaire regarding document code standardization was created and sent to 268 institutes to establish document classifications and generate a standard coding scheme. A computerized document management system was developed.Only 32% (8 out of 25 institutes) answered that they were able to identify all of the document types and their numbers. In total, 76% of institutes (19 out of 25) answered that a systematic document management system was necessary. Disorganized document files were systemized by classifying them into 8 major groups according to their characteristics: patient test records (T), test quality control (Q), manuals (M), equipment and environment management (E), statistics (S), division administration (A), department administration (R), and others (X).Our documentation system may serve as a basis for the standardization of documents and the creation of a document management system for all hospital laboratories.


PubMed | Center for Diagnostic Oncology
Type: Journal Article | Journal: Korean journal of pediatrics | Year: 2012

Passive exposure to tobacco smoke significantly contributes to morbidity and mortality in children. Children, in particular, seem to be the most susceptible population to the harmful effects of environmental tobacco smoke (ETS). Paternal smoking inside the home leads to significant maternal and fetal exposure to ETS and may subsequently affect fetal health. ETS has been associated with adverse effects on pediatric health, including preterm birth, intrauterine growth retardation, perinatal mortality, respiratory illness, neurobehavioral problems, and decreased performance in school. A valid estimation of the risks associated with tobacco exposure depends on accurate measurement. Nicotine and its major metabolite, cotinine, are commonly used as smoking biomarkers, and their levels can be determined in various biological specimens such as blood, saliva, and urine. Recently, hair analysis was found to be a convenient, noninvasive technique for detecting the presence of nicotine exposure. Because nicotine/cotinine accumulates in hair during hair growth, it is a unique measure of long-term, cumulative exposure to tobacco smoke. Although smoking ban policies result in considerable reductions in ETS exposure, children are still exposed significantly to tobacco smoke not only in their homes but also in schools, restaurants, child-care settings, cars, buses, and other public places. Therefore, more effective strategies and public policies to protect preschool children from ETS should be consolidated.


PubMed | Center for Diagnostic Oncology
Type: Comparative Study | Journal: Asian Pacific journal of cancer prevention : APJCP | Year: 2013

Environmental tobacco smoking (ETS) significantly contributes to morbidity and mortality and is a known risk factor for lung cancer development in lifelong nonsmokers. The metabolite 4-(methylnitrosamino)- 1-(3-pyridyl)-1-butanol (NNAL) and its glucuronides (NNAL-Glucs) have now emerged as leading biomarkers for the study of carcinogen exposure in non-smokers exposed to ETS.We carried out our study on NNAL in the urine of non-smokers exposed to ETS and the association between ETS and lung cancer. Subjects were enrolled from 2008-2010. NNAL was analyzed for 74 non-smoking lung cancer and 85 healthy controls. The main objective of this study was to provide an estimate of the risk of lung cancer from exposure to ETS in the Korean population.The mean NNAL concentration in urine was significantly lower in non-smoking patient groups (n=74) than in control groups (n=85) (4.715.0 pg/mg, 6.5 17.9 pg/mg, respectively, Mann-Whitney U test, p<0.001).The urine NNAL of non-smoking patients with lung cancer was not elevated with regard to the non-smoking control group. This may be due to life-style changes after diagnosis. A prospective study will be needed to evaluate the association of NNAL and non-smoking lung cancer.

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