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The Implication of Cytogenetic Alterations in Pancreatic Ductal Adenocarcinoma and Intraductal Papillary Mucinous Neoplasm Identified by Fluorescence In Situ Hybridization and Their Potential Diagnostic Utility

Lim CS, Im K, Lee DS, Kwon W, Kim JR, Han Y, Kim SW, Jang JY

Background/Aims: We investigated chromosomal aberrations in patients with pancreatic ductal adenocarcinoma (PDAC) and intraductal papillary mucinous neoplasm (IPMN) by fluorescence in situ hybridization (FISH) to identify cytogenetic changes and molecular...
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Prevalence and Clinicopathological Significance of METOverexpression and Gene Amplification in Patients withGallbladder Carcinoma

Kim Y, Bang SS, Jee S, Park S, Shin SJ, Jang K

Purpose Mesenchymal epithelial transition (MET) is a proto-oncogene that encodes a heterodimeric transmembrane receptor tyrosine kinase for the hepatocyte growth factor. Aberrant MET signaling has been described in several solid tumors—especially non-small cell...
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Malignant transformation in a Breast Adenomyoepithelioma Caused by Amplification of c-MYC: A Common pathway to Cancer in a Rare Entity

Febres-Aldana CA, Mejia-Mejia O, Krishnamurthy K, Mesko T, Poppiti R

Breast adenomyoepitheliomas are composed of a biphasic proliferation of myoepithelial cells around small epithelial-lined spaces. Due to the rarity of adenomyoepitheliomas, the molecular data describing them are limited. Adenomyoepitheliomas are...
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A Case of Trisomy 9 Mosaicism Confirmed by Microarray Test

Park CE, Chung ML, Hwang JH, Lee MK

Trisomy 9 mosaicism syndrome is a rare chromosomal abnormality with a high incidence of natural abortion and perinatal death. This syndrome is characterized by intrauterine growth retardation, mental retardation, craniofacial...
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Screening for down syndrome using trophoblast retrieval and isolation of the cervix: preliminary study

Lee MJ, Kim SH, Park HJ, Shim SH, Jang HY, Cha DH

Purpose: Trisomy 21, the cause of Down syndrome (DS) with various medical problems, is the most common aneuploidy during the fetal period. For diagnosis, a non-invasive screening test using maternal...
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Multistaining Optimization for Epstein-Barr Virus–Encoded RNA In Situ Hybridization and Immunohistochemistry of Formalin-Fixed Paraffin-Embedded Tissues Using an Automated Immunostainer

Ko JN, Jung JK, Park YI, Shin HJ, Huh J, Back S, Kim YJ, Kim JH, Go H

BACKGROUND: Single staining is commonly performed for practical pathologic diagnoses. However, this method is limited in its ability to specify cellular morphology and immunophenotype and often requires consumption of limited...
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Overexpression of HER2/HER3 and clinical feature of ovarian cancer

Chung YW, Kim S, Hong JH, Lee JK, Lee NW, Lee YS, Song JY

OBJECTIVES: Human epidermal growth factor receptor-2 (HER2) and 3 (HER3) belong to the epidermal growth factor receptor (EGFR) family of transmembrane receptor tyrosine kinases. In this study, we assessed HER2/HER3...
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Benign Gastric Ulcer with Epstein-Barr Virus Infection Mimicking Malignant Gastric Ulcer

Gwak JW, Yoo J, Suh SO, Kim J, Oh IS, Bae JY

Epstein-Barr virus (EBV) is the cause of infectious mononucleosis, which is characterized by fever, lymphadenopathy, and sore throat. On the other hand, gastrointestinal symptoms of EBV infection like dyspepsia, abdominal...
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Necessity of In Situ Hybridization Test of Human Epidermal Growth Factor Receptor 2 (HER2) Status in Breast Cancer Patients with Equivocal HER2 Immunohistochemistry Results

Paik HJ, Choi HJ, Ryu JM, Park S, Kim I, Lee SK, Yu J, Kim SW, Nam SJ, Lee JE

PURPOSE: Accurate human epidermal growth factor receptor 2 (HER2) status is important in predicting prognosis and providing treatment for HER2-positive breast cancer patients. However, performing in situ hybridization (ISH) can...
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Clinical Utility of a Diagnostic Approach to Detect Genetic Abnormalities in Multiple Myeloma: A Single Institution Experience

Jung HA, Jang MA, Kim K, Kim SH

BACKGROUND: The identification of genetic abnormalities in patients with multiple myeloma (MM) has gained emphasis because genetics-based risk stratification significantly affects overall survival (OS). We investigated genetic abnormalities using conventional...
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Anaplastic Large Cell Lymphoma with Massive Eosinophilia and Complex Karyotype Initially Misdiagnosed as Chronic Eosinophilic Leukemia

So MK, Park S, Cho MS, Mun YC, Huh J

We report a patient with massive eosinophilia and a complex karyotype that was initially misdiagnosed as chronic eosinophilic leukemia (CEL), but later diagnosed as anaplastic large cell lymphoma (ALCL) masked...
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Report on the External Quality Assessment Scheme for Cytogenetics and Molecular Cytogenetics in Korea (2016–2017)

Kim J, Shin S, Kim B, Lee ST, Kim M, Choi JR

In both 2016 and 2017, the cytogenetic and molecular cytogenetic programs conducted three assessments for the Korean Association of External Quality Assessment Service. A total of six cases with chromosomal...
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Clinical Implications According to Diagnostic Methods of Human Epidermal Growth Factor Receptor 2 Positivity in Breast Cancer: A Retrospective Study

Kim BK, Jeong J, Han W, Yoon TI, Seong MK, Jung JH, Jung SH, Lee J, Sun WY, Korean Breast Cancer Society

PURPOSE: According to American Society of Clinical Oncology/College of American Pathologists guidelines, breast cancer is human epidermal growth factor receptor 2 (HER2) positive if there is HER2 protein overexpression at...
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Clinicohematological parameters and outcomes in a cohort of chronic lymphocytic leukemia patients with Deletion 17p from Pakistan

Mahmood R, Khan SA, Altaf C, Malik HS, Khadim MT

BACKGROUND: Chronic lymphocytic leukemia (CLL) exhibits profound heterogeneity in its clinical course. Its clinicohematological and cytogenetic features play a significant role in determining the clinical course and in predicting the...
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Ligand-Independent Epidermal Growth Factor Receptor Overexpression Correlates with Poor Prognosis in Colorectal Cancer

Yun S, Kwak Y, Nam SK, Seo AN, Oh HK, Kim DW, Kang SB, Lee HS

PURPOSE: Molecular treatments targeting epidermal growth factor receptors (EGFRs) are important strategies for advanced colorectal cancer (CRC). However, clinicopathologic implications of EGFRs and EGFR ligand signaling have not been fully...
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NanoString nCounter® Approach in Breast Cancer: A Comparative Analysis with Quantitative Real-Time Polymerase Chain Reaction, In Situ Hybridization, and Immunohistochemistry

Hyeon J, Cho SY, Hong ME, Kang SY, Do I, Im YH, Cho EY

PURPOSE: Accurate testing for estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2) is essential for breast cancer treatment. At present, immunohistochemistry (IHC)/florescence in situ...
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HER2 Status and Its Heterogeneity in Gastric Carcinoma of Vietnamese Patient

Phan DA, Nguyen VT, Hua TN, Ngo QD, Doan TP, Nguyen ST, Thai AT, Nguyen VT

BACKGROUND: Human epidermal growth factor receptor 2 (HER2) is related to the pathogenesis and poor outcome of numerous types of carcinomas, including gastric carcinoma. Gastric cancer patients with HER2 positivity...
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Comprehensive management of cholangiocarcinoma: Part I. Diagnosis

Papafragkakis C, Lee JH

Cholangiocarcinoma is the second most common primary hepatic malignancy and its incidence is increasing worldwide. Classification and staging of intrahepatic, perihilar, and distal cholangiocarcinomas provide useful prognostic information and further...
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Molecular Testing of Lymphoproliferative Disorders: Current Status and Perspectives

Jeon YK, Yoon SO, Paik JH, Kim YA, Shin BK, Kim HJ, Cha HJ, Kim JE, Huh J, Ko YH, The Hematopathology Study Group of the Korean Society of Pathologists, The Molecular Pathology Study Group of Korean Society of Pathologists

Molecular pathologic testing plays an important role for the diagnosis, prognostication and decision of treatment strategy in lymphoproliferative disease. Here, we briefly review the molecular tests currently used for lymphoproliferative...
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Dysregulation of Telomere Lengths and Telomerase Activity in Myelodysplastic Syndrome

Park HS, Choi J, See CJ, Kim JA, Park SN, Im K, Kim SM, Lee DS, Hwang SM

BACKGROUND: Telomere shortening is thought to be involved in the pathophysiology of myeloid malignancies, but telomere lengths (TL) during interphase and metaphase in hematopoietic malignancies have not been analyzed. We...
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