Types of Breast Cancer in Men
The most common types of breast cancer are ductal carcinoma in situ, invasive ductal carcinoma, and invasive lobular carcinoma.
Most breast cancers are carcinomas. In fact, breast cancers are often a type of carcinoma called adenocarcinoma, which starts in cells that make glands (glandular tissue). Breast adenocarcinomas start in the ducts (the milk ducts) or the lobules (milk-producing glands).
There are other, less common, types of breast cancers, too, such as sarcomas, phyllodes, Paget’s disease and angiosarcomas which start in the cells of the muscle, fat, or connective tissue.
Sometimes a single breast tumor can be a combination of different types. And in some very rare types of breast cancer, the cancer cells may not form a lump or tumor at all.
When a biopsy is done to find out the specific type of breast cancer, the pathologist also will say if the cancer has spread in to the surrounding tissues. The name of the breast cancer type will change depending on the extent of the cancer.
In situ breast cancers have not spread.
Invasive or infiltrating cancers have spread (invaded) into the surrounding breast tissue.