Gene Predicts Breast Cancer Treatment Success Oct. 12, 2010 -- Scientists have identified a gene that could help predict whether a breast cancer patient will respond to the drug tamoxifen.

A study published today in the British Journal of Cancer showed a potential link between the activity of a gene called BCAR4 and the likelihood that a breast cancer tumor will not respond to tamoxifen hormone therapy.

The study also found that the level of BCAR4 in a tumour was linked to a poor prognosis regardless of whether the patient received tamoxifen.

A Visual Guide to Breast Cancer