AR and skin basal cell carcinoma: BCC is characterized by the expression of high-molecular-weight cytokeratins (HMWCKs) like CK-AE1/AE3, CK-5/6, CK-14, BerEP4/EpCAM (a membrane glycoprotein absent in normal squamous epithelium or SCC), BCL2, p63, CD10 (positive in tumor cells and negative in stroma), androgen receptor (AR) and p53.