Metastatic breast cancer is the most advanced stage of breast cancer (stage 4), in which cancer has spread beyond the breast to other organs in the body, including bones, liver, lungs or brain.
Even when diagnosed at an early stage, up to 30 percent of women with early stage breast cancer will eventually progress to metastatic disease. This occurs despite receiving appropriate medical intervention for the early stage diagnosis.
6-10% of NEWLY diagnosed breast cancer patients are diagnosed stage 4 or Metastatic.
Metastatic Breast Cancer can occur 5, 10, 15 years or more, after a persons original diagnosis and treatment.