• Amplification of the CCND1 gene is present in: non-small cell lung cancers (30-46%) head and neck squamous cell carcinomas (30-50%) pancreatic carcinomas (25%) bladder cancer (15%) pituitary adenomas (49-54%) breast carcinoma (13%) Cyclin D1 overexpression is strongly correlated to ER+ breast cancer and deregulation of cyclin D1 is associated with hormone therapy resistance in breast cancer. (wikipedia.org)