One major way of defining your type of breast cancer is whether or not it is:
Endocrine receptor (estrogen or progesterone receptor) positive
Triple negative, not positive to receptors for estrogen, progesterone, or HER2
Triple positive, positive for estrogen receptors, progesterone receptors and HER2
These classifications provide doctors with valuable information about how the tumor acts and what kind of treatments may work best.
In general, surgical and...