Prostate-specific antigen (PSA) is an appropriate marker for PCa, and Cytokeratin 7 (CK7) and high-molecular-weight cytokeratin (HMWK) clone‎ ‎34β£12‎‏ ‏ are suitable markers for bladder carcinoma (11), and their combination can play a significant role in differentiating these cancers (12, 13). This evidence concerns the gene KRT7 and cancer.