Is HERmark appropriate for all types of invasive breast cancer?

The HERmark report is based on reference data from 1090 samples in both adjuvant and metastatic breast cancer patient cohorts. The patient data represent a large sample size and covers a broad range of HER-2 protein levels. Therefore, the HERmark Breast Cancer Assay can accurately quantify HER-2 total protein expression in most properly formalin-fixed paraffin-embedded (FFPE) breast cancer tumor tissue specimens.