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Accurate Assessment of HER2 Gene Status for Invasive Component of Breast Cancer by Combination of immunohistochemistry and Chromogenic In Situ Hybridization

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2013年第3期33卷 379-384页

作者：聂秀贺骏李燕潘丹珍潘华雄翁密霞杨秀萍刘春萍黄韬 Department of Pathology Union HospitalTongji Medical CollegeHuazhong University of Science and Technology Department of Surgery Union HospitalTongji Medical CollegeHuazhong University of Science and Technology

Summary： The specimens of ductal carcinoma in situ （DCIS） with early invasion, and specimens col- lected by core needle biopsy （CNB） tend to contain limited amount of invasive component, so it is im- perative to explore a new technique which can assess HER2 gene status accurately for the limited inva- sive cancer component in these specimens. Dual staining technique of combining immunohistochemis- try （IHC） for myoepithelial cells and single or dual probe chromogenic in situ hybridization （CISH） for HER2 gene was performed on routinely processed paraffin sections from 20 cases diagnosed as having DCIS with invasive cancer. Among them, 10 had fluorescence in situ hybridization （FISH）-confirmed amplification of HER2 and 10 had FISH-confirmed non-amplification of HER2. We successfully de- tected HER2 genetic signals and myoepithelial IHC markers （SMM-HC or CK5/6） simultaneously on a single section in all 20 specimens. Myoepithelial markers and HER2 signals detected by dual staining assay were consistent with those by individual technique performed alone. HER2 gene amplification results determined by dual staining assay were 100% consistent with those of FISH. Dual staining tech- nique which allows simultaneous detection of myoepithelial marker protein and cancerous HER2 gene is feasible, and it has potential to be used in clinical practice for effective determination of HER2 ampli- fication in limited invasive component.

关键词： human epidermal growth factor receptor 2 chromogenic in situ hybridization immunohis- tochemistry

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