About 80% of all breast cancers are “ER-positive.” About 65% of these are also “PR-positive.”
Inflammatory breast cancer is a rare, aggressive form of breast cancer that often appears as a rash or skin irritation.
Invasive and metastatic both refer to cancer that has spread from the site in the breast where it first started.
Invasive lobular carcinoma is breast cancer that begins in one of the milk glands and spreads to other parts of the breast.
Ductal carcinoma is a common type of breast cancer that starts in cells that line the milk ducts.
Mucinous breast cancer is a rare type of cancer that makes up less than 2% of all breast cancer cases.
Paget's disease of the breast is a rare type of cancer that forms in or around your nipple.
When a tumor is hormone-sensitive, its cells have proteins on their surfaces called receptors.
HER2-negative and HER2-positive are types of breast cancer that share some things in common, but they differences, too.
The importance of HER2 status for survival will depend on how far the cancer has spread.
HER2 gene defects develop sometime during your life. Researchers aren’t sure what causes these mutations to happen.
Triple-negative breast cancer is any cancer that tests negative for the hormones estrogen and progesterone and HER2.
Some breast cancer cells have progesterone receptors on them. This is called progesterone-receptor positive breast cancer.