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.