Definitions for "Invasive breast cancer"
This type of breast cancer has broken through the wall of the duct and invaded the fatty tissue of the breast. At that point, it has the potential to metastasize, or spread, to other parts of the body through the lymphatic system (lymph nodes) and bloodstream. More information on types of breast can be found at the American Cancer Society’s Breast Cancer Resource Center at
Breast cancer that can spread beyond the breast to other parts of the body.
cancer that has spread beyond the layer of cells where it started to nearby tissue.