Researchers discover reason why breast cancer cells become drug resistant

[News]

Breast cancer treatments such as Herceptin that target a marker called HER2 have dramatically improved outcomes for women with this type of cancer. But nearly half of these cancers are resistant to Herceptin from the start and almost all of them will eventually become resistant.

More... (http://www.news-medical.net/news/20120721/Researchers-discover-reason-why-breast-cancer-cells-become-drug-resistant.aspx)