Breast cancer markers
Triple negative breast cancer
Also written as TNBC, ER-negative PR-negative HER2-negative, Triple negative
What it means
In triple negative breast cancer the tumour cells do not have oestrogen receptors, progesterone receptors, or large amounts of the HER2 protein on their surface.
Why it matters
Knowing whether breast cancer is triple negative is important in planning treatment. Your oncologist explains the options.
Ask your oncologist
"Because my cancer is triple negative, what is the treatment plan and why?"
From NCI Dictionary of Cancer Terms: triple-negative breast cancer. Not medical advice: your oncologist decides.