Types of Breast Cancer
- There are several types of breast cancer. The most common one begins in the lining of the ducts and is called ductal carcinoma. Another type, called lobular carcinoma, arises in the lobules.
- When breast cancer spreads outside the breast, cancer cells are often found in the lymph nodes under the arm (axillary lymph nodes). If the cancer has reached these nodes, it may mean that cancer cells have spread to other parts of the body—other lymph nodes and other organs, such as the bones, liver, or lungs.
- Cancer that spreads is the same disease and has the same name as the original (primary) cancer. When breast cancer spreads, it is called metastatic breast cancer, even though the secondary tumor is another organ. Doctors call this "distant" disease.