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. Cytokeratins 5/6 are 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 and adrenocortical tumours.