Triple negative breast cancer is a sub-type of the disease for which there are currently no targeted treatments. In addition, this form of breast cancer can be more aggressive than others.

Patients with hormone-positive breast cancer are usually treated with hormone therapies such as tamoxifen or aromatase inhibitors. However, many of these patient's breast camcer become resistant to these drugs or develop resistance during treatment, allowing their breast cancer to return.

Patients with triple negative breast cancer have limited treatment options because their breast tumours lack the receptors which targeted therapies like tamoxifen and Herceptin act against.