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  • 1
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aims: This study was performed to test the validity of different methods for determining the status of the erbB-2/HER-2 oncogene in breast cancer tissues for diagnostic use.Methods and results: Forty formalin-fixed, paraffin-embedded breast carcinomas were investigated by fluorescence in situ and comparative genomic hybridization (FISH, CGH) as well as by immunohistochemistry (IHC) using Dako-HercepTestTM and CB11 antibody (Ventana). Additionally, competitive-differential polymerase chain reaction (cdPCR) was performed on frozen samples to estimate gene dosage alterations of erbB-2/HER-2. Amplification was detected in 12–23% and protein overexpression in 16–68% of the cases, depending on the methodology and/or the reagent used. Perfect concordance (100%) was found between the results of cdPCR and CB11-IHC, and a 97% concordance between FISH and CB11-IHC. The concordance between Dako-HercepTestTM and CB11-IHC was 78%; seven of eight 2 + carcinomas with the Dako-HercepTestTM were classified as nonamplified using FISH.Conclusions: Our results indicate that high-level expression as well as normal erbB-2/HER-2 status of breast carcinomas can be detected reliably both by IHC and gene dosage assessment in paraffin material for diagnostic use. However, borderline results, especially those with 2 + immunopositivity, should be interpreted with caution and increased emphasis should be given to other clinical and prognostic information available.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1963
    Keywords: Schlüsselwörter Mammakarzinom ; DCIS ; CGH ; Progression ; Keywords Breast cancer ; Ductal carcinoma in situ ; Lobular carcinoma in situ ; Progression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Abstract Ductal carcinoma in situ of the female breast and lobular carcinoma in situ are regarded as precursor lesions of invasive breast cancer. We used comparative genomic hybridization to analyze the genetic relationship between these two types of lesion and invasive breast cancer. The series included 166 patients with ductal or lobular carcinoma in situ and invasive breast cancer. Our results reflect the broad heterogeneity of morphologically different subtypes of invasive and noninvasive breast cancer. The data also provide evidence of multiple genetic pathways of invasive breast cancer associated with different morphological subtypes. In conclusion, we propose a combined model of morphological-genetic progression with various parallel pathways in the pathogenesis of invasive breast cancer.
    Notes: Zusammenfassung Sowohl das duktale In-situ-Karzinom (DCIS) als auch das Carcinoma lobulare in situ (CLIS) werden als Vorläufer des invasiven Mammakarzinoms betrachtet. Mit der Zielsetzung, Einblicke in die genetische Entwicklung des Mammakarzinoms zu erhalten, untersuchten wir insgesamt 166 Fälle von DCIS, CLIS und invasiven Mammakarzinomen mittels der “Comparativen Genomischen Hybridisierung” (CGH). Unsere Ergebnisse spiegeln die große Vielfalt der Morphologie präinvasiver und invasiver Mammakarzinome wider. Darüber hinaus geben unsere Ergebnisse Hinweise auf unterschiedliche, mit distinkten morphologischen Subtypen assoziierte genetische Entstehungswege des invasiven Mammakarzinoms. Aufgrund unserer Ergebnisse schlagen wir ein erweitertes, zytogenetisch fundiertes Progressionsmodell mit parallelen Entstehungswegen des invasiven Mammakarzinoms vor.
    Type of Medium: Electronic Resource
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