triple positive

Definition of triple-positive breast cancer

triple-positive breast cancer

(TRIH-pul-PAH-zih-tiv brest KAN-ser)
A type of breast cancer in which the tumor cells have estrogen receptors, progesterone receptors, and a larger than normal number of HER2 receptors on their surface. Knowing if breast cancer is triple positive may help plan the best treatment, which may include hormone therapy and drugs that target the HER2 receptor.

Source: NCI Dictionary of Cancer Terms