Preferential HER-2/neu overexpression and/or amplification in aggressive histological subtypes of invasive breast cancer

Aims:  To investigate whether alterations of the HER2 gene occur more frequently in histologically unfavourable subtypes of invasive breast cancer. Methods:  The study was composed of nine invasive apocrine, six lipid‐rich, 12 glycogen‐rich, 11 micropapillary and 33 pleomorphic lobular breast carcin...

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Veröffentlicht in:Histopathology 2004-04, Vol.44 (4), p.332-338
Hauptverfasser: Varga, Z, Zhao, J, Öhlschlegel, C, Odermatt, B, Heitz, P U
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container_end_page 338
container_issue 4
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container_title Histopathology
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creator Varga, Z
Zhao, J
Öhlschlegel, C
Odermatt, B
Heitz, P U
description Aims:  To investigate whether alterations of the HER2 gene occur more frequently in histologically unfavourable subtypes of invasive breast cancer. Methods:  The study was composed of nine invasive apocrine, six lipid‐rich, 12 glycogen‐rich, 11 micropapillary and 33 pleomorphic lobular breast carcinomas. Lymph node involvement was represented in all subgroups. HER2 status was confirmed in all cases by using immunohistochemistry (CB11, Herceptest) and fluorescent in‐situ hybridization (FISH) analysis (Vysis). Results:  Micropapillary and apocrine carcinomas showed the highest rate of protein overexpression (72% and 66%) and gene amplification (45% and 44%). Protein overexpression was common in poorly differentiated pleomorphic lobular carcinomas (56%); however, this subgroup failed to show an increased number of gene copies by FISH (31%). The incidence of HER2 overexpression (33% and 50%, respectively) and gene amplification (25% and 33%, respectively) among glycogen‐rich and lipid‐rich carcinomas was not higher than that observed in breast cancer generally. Conclusion:  Our data suggest that preferential involvement of the HER2 gene in micropapillary and apocrine breast carcinomas may contribute to their aggressive behaviour.
doi_str_mv 10.1111/j.1365-2559.2004.01843.x
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Methods:  The study was composed of nine invasive apocrine, six lipid‐rich, 12 glycogen‐rich, 11 micropapillary and 33 pleomorphic lobular breast carcinomas. Lymph node involvement was represented in all subgroups. HER2 status was confirmed in all cases by using immunohistochemistry (CB11, Herceptest) and fluorescent in‐situ hybridization (FISH) analysis (Vysis). Results:  Micropapillary and apocrine carcinomas showed the highest rate of protein overexpression (72% and 66%) and gene amplification (45% and 44%). Protein overexpression was common in poorly differentiated pleomorphic lobular carcinomas (56%); however, this subgroup failed to show an increased number of gene copies by FISH (31%). The incidence of HER2 overexpression (33% and 50%, respectively) and gene amplification (25% and 33%, respectively) among glycogen‐rich and lipid‐rich carcinomas was not higher than that observed in breast cancer generally. Conclusion:  Our data suggest that preferential involvement of the HER2 gene in micropapillary and apocrine breast carcinomas may contribute to their aggressive behaviour.</description><identifier>ISSN: 0309-0167</identifier><identifier>EISSN: 1365-2559</identifier><identifier>DOI: 10.1111/j.1365-2559.2004.01843.x</identifier><identifier>PMID: 15049898</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Science Ltd</publisher><subject>Aged ; Biological and medical sciences ; breast cancer ; Breast Neoplasms - metabolism ; Breast Neoplasms - pathology ; Carcinoma - metabolism ; Carcinoma - pathology ; Female ; FISH ; Fundamental and applied biological sciences. Psychology ; Fundamental immunology ; Gene Amplification ; HER-2/neu ; Humans ; Immunohistochemistry ; Medical sciences ; Middle Aged ; Neoplasm Invasiveness ; Receptor, ErbB-2 - biosynthesis ; Receptor, ErbB-2 - genetics ; Sarcoidosis. Granulomatous diseases of unproved etiology. Connective tissue diseases. 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Methods:  The study was composed of nine invasive apocrine, six lipid‐rich, 12 glycogen‐rich, 11 micropapillary and 33 pleomorphic lobular breast carcinomas. Lymph node involvement was represented in all subgroups. HER2 status was confirmed in all cases by using immunohistochemistry (CB11, Herceptest) and fluorescent in‐situ hybridization (FISH) analysis (Vysis). Results:  Micropapillary and apocrine carcinomas showed the highest rate of protein overexpression (72% and 66%) and gene amplification (45% and 44%). Protein overexpression was common in poorly differentiated pleomorphic lobular carcinomas (56%); however, this subgroup failed to show an increased number of gene copies by FISH (31%). The incidence of HER2 overexpression (33% and 50%, respectively) and gene amplification (25% and 33%, respectively) among glycogen‐rich and lipid‐rich carcinomas was not higher than that observed in breast cancer generally. Conclusion:  Our data suggest that preferential involvement of the HER2 gene in micropapillary and apocrine breast carcinomas may contribute to their aggressive behaviour.</description><subject>Aged</subject><subject>Biological and medical sciences</subject><subject>breast cancer</subject><subject>Breast Neoplasms - metabolism</subject><subject>Breast Neoplasms - pathology</subject><subject>Carcinoma - metabolism</subject><subject>Carcinoma - pathology</subject><subject>Female</subject><subject>FISH</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Fundamental immunology</subject><subject>Gene Amplification</subject><subject>HER-2/neu</subject><subject>Humans</subject><subject>Immunohistochemistry</subject><subject>Medical sciences</subject><subject>Middle Aged</subject><subject>Neoplasm Invasiveness</subject><subject>Receptor, ErbB-2 - biosynthesis</subject><subject>Receptor, ErbB-2 - genetics</subject><subject>Sarcoidosis. 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Psychology</topic><topic>Fundamental immunology</topic><topic>Gene Amplification</topic><topic>HER-2/neu</topic><topic>Humans</topic><topic>Immunohistochemistry</topic><topic>Medical sciences</topic><topic>Middle Aged</topic><topic>Neoplasm Invasiveness</topic><topic>Receptor, ErbB-2 - biosynthesis</topic><topic>Receptor, ErbB-2 - genetics</topic><topic>Sarcoidosis. Granulomatous diseases of unproved etiology. Connective tissue diseases. Elastic tissue diseases. Vasculitis</topic><topic>special type</topic><topic>Tumors</topic><topic>unfavourable prognosis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Varga, Z</creatorcontrib><creatorcontrib>Zhao, J</creatorcontrib><creatorcontrib>Öhlschlegel, C</creatorcontrib><creatorcontrib>Odermatt, B</creatorcontrib><creatorcontrib>Heitz, P U</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Histopathology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Varga, Z</au><au>Zhao, J</au><au>Öhlschlegel, C</au><au>Odermatt, B</au><au>Heitz, P U</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Preferential HER-2/neu overexpression and/or amplification in aggressive histological subtypes of invasive breast cancer</atitle><jtitle>Histopathology</jtitle><addtitle>Histopathology</addtitle><date>2004-04</date><risdate>2004</risdate><volume>44</volume><issue>4</issue><spage>332</spage><epage>338</epage><pages>332-338</pages><issn>0309-0167</issn><eissn>1365-2559</eissn><abstract>Aims:  To investigate whether alterations of the HER2 gene occur more frequently in histologically unfavourable subtypes of invasive breast cancer. Methods:  The study was composed of nine invasive apocrine, six lipid‐rich, 12 glycogen‐rich, 11 micropapillary and 33 pleomorphic lobular breast carcinomas. Lymph node involvement was represented in all subgroups. HER2 status was confirmed in all cases by using immunohistochemistry (CB11, Herceptest) and fluorescent in‐situ hybridization (FISH) analysis (Vysis). Results:  Micropapillary and apocrine carcinomas showed the highest rate of protein overexpression (72% and 66%) and gene amplification (45% and 44%). Protein overexpression was common in poorly differentiated pleomorphic lobular carcinomas (56%); however, this subgroup failed to show an increased number of gene copies by FISH (31%). The incidence of HER2 overexpression (33% and 50%, respectively) and gene amplification (25% and 33%, respectively) among glycogen‐rich and lipid‐rich carcinomas was not higher than that observed in breast cancer generally. 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subjects Aged
Biological and medical sciences
breast cancer
Breast Neoplasms - metabolism
Breast Neoplasms - pathology
Carcinoma - metabolism
Carcinoma - pathology
Female
FISH
Fundamental and applied biological sciences. Psychology
Fundamental immunology
Gene Amplification
HER-2/neu
Humans
Immunohistochemistry
Medical sciences
Middle Aged
Neoplasm Invasiveness
Receptor, ErbB-2 - biosynthesis
Receptor, ErbB-2 - genetics
Sarcoidosis. Granulomatous diseases of unproved etiology. Connective tissue diseases. Elastic tissue diseases. Vasculitis
special type
Tumors
unfavourable prognosis
title Preferential HER-2/neu overexpression and/or amplification in aggressive histological subtypes of invasive breast cancer
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