Most breast cancers are adenocarcinomas.
This term is used for several types of breast cancer that start in the glandular tissues of the breast, such as the lobules and ducts.
Breast angiosarcoma is a rare type of cancer.
This kind of breast cancer develops in the walls of blood vessels or the vessels of the lymphatic system.
Ductal carcinoma in situ (DCIS)
DCIS is a very treatable form of breast cancer.
It develops in the ducts of your breasts but remains “in situ.” This means it hasn’t spread to other areas.
Inflammatory breast cancer (IBC)
This rare form of breast cancer doesn’t typically cause a lump in the breast.
Instead, you may notice an unusual texture, swelling or redness. Because it can spread quickly, early care is important.
Invasive ductal carcinoma (IDC)
IDC begins in the milk ducts. Then, it spreads to other areas of the breast outside of the duct.
It’s the most common type of breast cancer.
Invasive lobular carcinoma (ILC)
ILC is a common form of breast cancer.
It develops in the lobules, which are the parts of the breasts that make milk.
It’s called “invasive” because cancer has spread outside the lobules.
Metastatic breast cancer (MBC)
As breast cancer grows, it can spread to other areas of the body, such as the brain or bones.
In MBC, cancer has spread outside the breast tissue and nearby tissue.
It’s also called stage IV breast cancer.
In Paget’s disease, cancer cells form around or in your nipple.
It makes up a small percentage of breast cancers.
In many cases, women have Paget’s disease along with another type of breast cancer.
Triple negative breast cancer (TNBC)
TNBC is negative for three receptors found in other breast cancers—estrogen, progesterone and the HER2 protein.
Because of this, it may not respond to the same treatments as other types of cancer.