Metastatic breast cancer is not a specific type of breast cancer, but rather the most advanced stage of breast cancer. The cancer has spread to other parts of the body. This usually includes the lungs, liver, bones or brain. Although metastatic breast cancer has spread to another part of the body, it’s considered and treated as breast cancer. The exact treatment for metastatic breast cancer varies from person to person, where; guidelines help to ensure high-quality care. If a breast cancer has metastasized beyond the lymph nodes it is termed a systemic disease. This means that the whole body must be treated and not just a particular area. The only way to effectively treat the whole body is usually through chemotherapy and hormonal therapy. However, there are still over half a million deaths worldwide from breast cancer and over 90% of these women die of metastasis. Systemic drugs are the main treatment for metastatic breast cancer, local and regional treatments such as surgery, radiation therapy, or regional chemotherapy is sometimes used as well. These can help treat breast cancer in a specific part of the body, but they are very unlikely to get rid of all of the cancer.