YAP-1 protein is overexpressed in various cancers, including colorectal cancer, gastric cancer, hepatocellular carcinoma, breast cancer, hedgehog-associated medulloblastoma, esophageal and oral squamous cell carcinoma (SCC), leukemia and other solid tumors (7, 8, 12–35), and has been referred to as an oncogene. Here, YAP1 is linked to breast carcinoma.