Once breast cancer is detected through imaging tests and a biopsy, the cancer cells are tested for certain proteins. If they lack estrogen and progesterone receptors and do not have much HER2 protein, the cancer is classified as triple-negative.
Once breast cancer is detected through imaging tests and a biopsy, the cancer cells are tested for certain proteins. If they lack estrogen and progesterone receptors and do not have much HER2 protein, the cancer is classified as triple-negative.