A Novel Role for Cathepsin S as a Potential Biomarker in Triple Negative Breast Cancer

Figure 1

Representative images of CTSS expression in patient samples. CTSS-specific expression is indicated by brown staining versus blue nuclear counter staining. Samples represent either epithelial or stromal CTSS staining. Black arrows indicate areas of CTSS expression, which was separated according to high (3), moderate (2), low (1), or no expression (0).