Test Details: Immunohistochemical testing is carried out on biopsy/resected tissue specimen. This testing helps to identify specific antigens (proteins) within tissue sections utilizing an antigen-specific antibody .Cytokeratin 5 is a type II cytokeratin and a main component of the cytoskeleton of basal cells of stratified epithelium. Cytokeratins 5, 6 are related cytokeratins expressed in stratified squamous epithelium, myoepithelium in prostatic and mammary glands, and mesothelium. It is expressed in Squamous cell carcinoma, mesothelioma, myoepithelial tumours, basal-like phenotype breast carcinoma, adrenocortical tumours.