Fig. 3From: Serum matrix metalloproteinase-13 as a diagnostic biomarker for cutaneous squamous cell carcinomaImmunohistochemical analysis of MMP-13. IHC analysis of the normal tissue from a healthy subject showed several MMP-13 positive cells (light brown staining indicated by the red arrow in panel a). Panel b is an IHC microphotograph for the cSCC tissue, and brown staining can be seen in most of tumor cellsBack to article page