NCI Cancer Bulletin: (U.S.) FDA Approves Test to Identify Candidates for Breast Cancer Drug - Trastuzumab (Herceptin) - HER2 gene

FDA Approves Test to Identify Candidates for Breast Cancer Drug

The Food and Drug Administration (FDA) has approved a genetic test that doctors can use to help identify women with breast cancer who have extra copies of the HER2 gene and therefore may benefit from the drug trastuzumab (Herceptin).
Trastuzumab targets the protein made by the HER2 gene, which is located on chromosome 17. Approximately 25 percent of breast cancers have extra copies of the HER2 gene and produce higher levels of the HER2 protein. These tumors tend to grow faster and are more likely to recur than tumors that don’t overexpress HER2........cont'd