You should know that there are some breast cancer stages that divided into noninvasive tumor and invasive tumor. The invasive tumor divided localized stage, regional stage, and distant stage. You also need to give more attention to metastatic breast cancer because it can spread to other sites in the body so it can be more dangerous. For woman who suffering breast cancer, you can use herceptin as the breast cancer treatment. Herceptin is a therapy for women with breast cancer whose tumors have too much HER2 protein. Herceptin probably have some side effects and if you need more information about herceptin and breast cancer treatment, you will get it from herceptin.com.