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The page below is a sample from the LabCE course HER2 Testing in Breast Cancer. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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HER2 by Immunohistochemistry (IHC)

All of the following are FDA approved IHC testing methods for HER2:
HercepTest- Agilent Dako (Santa Clara, California)
Semi-quantitative IHC assay for the determination of HER2 protein overexpression in breast cancer tissues routinely processed for histological evaluation. The HercepTest™, developed by Dako Cytomation, can be used on Agilent Dako automated staining platforms and consists of ready to use reagents. It is a two-step IHC procedure for routinely processed, formalin-fixed, paraffin embedded (FFPE) tissue specimens. Agilent Dako was the first company to offer an FDA approved testing kit and is/was considered the 'gold standard'. The c-erbB-2 antibody is a rabbit polyclonal product.

Bond Oracle HER2 IHC System- Leica Biosystems (Buffalo Grove, Illinois)
Semi-quantitative immunohistochemical (IHC) assay that uses a mouse monoclonal antibody to determine HER2 (Human Epidermal Growth Factor Receptor 2) oncoprotein status in formalin-fixed, paraffin-embedded breast cancer tissue processed for histological evaluation following automated staining on Leica BOND automated slide staining instruments. The antibody is directed against the internal domain of the HER2 oncoprotein.

Pathway anti-HER2/neu (Clone 4B5) - Ventana Medical Systems of ROCHE Diagnostics (Indianapolis, Indiana)
Semi-quantitative IHC assay using a rabbit monoclonal antibody directed against the internal domain of the c-erbB-2 oncoprotein (HER2) in sections of formalin-fixed, paraffin-embedded normal and neoplastic tissue on a Ventana automated immunohistochemistry slide staining instrument.