The abnormal lump or spot may be found using mammography or other testing methods. A procedure called a biopsy removes a piece of tissue from the lump or spot to find out if cancer cells are present. The pathology report will tell you what kinds of cells are present. is the breast cancer invasive? If breast cancer is found, it’s important to know whether the cancer has spread outside the milk ducts or lobules of the breast where it started. Non-invasive cancers stay within the milk ducts or milk lobules in the breast. They do not grow into or invade normal.
