1What Is Metastatic Breast Cancer?
Metastatic breast cancer is stage IV of breast cancer in which cancer cells have spread from the breasts to other areas of the body. This process of spreading is known as metastasis. Cancer cells travel through the lymphatic system or bloodstream to different parts, especially the liver, brain, lungs, and bones. Metastatic breast cancer may occur months or even years after the initial diagnosis or treatment. It is estimated that approximately 30 percent of women with breast cancer may develop metastasis later. It may also happen in men, but the exact statistics are still unknown. [1]
