Luminal A: The most common subtype and represents 50% – 60% of all breast cancers.
Luminal B: Hormone-receptor positive (estrogen-receptor and/or progesterone-receptor positive Luminal B), and either HER2 positive or HER2 negative.
Triple-Negative: Cancer that tests negative for
- estrogen receptors
- progesterone receptors
- and HER2 protein
About 10 – 20% of breast cancers are triple-negative breast cancers.