<qa>  What is the immunohistochemical assay?The anti Her2neu Kit is a semi-quantitative immunohistochemical IHC assay to identify the Human Epithelial growth factor receptor Her2neu expression in formalin-fixed, paraffin-embedded human breast cancer tissue specimens. Results from the Her-2 test is indicated as an aid in the assessment of patients for whom HERCEPTIN Trastuzumab treatment is being considered. While the Her-2 kit provides the antibodies that offer direct visualization and semi-quantification of the HER2 protein expression through a brightfield microscope, the GenASIs GoPath system is designed to complement the routine workflow of the pathologist in the review of immunohistochemically stained histologic slides. 