What is metastatic breast cancer?

Metastatic breast cancer, often referred to as advanced breast cancer, is when breast cancer spreads beyond its original site to a different site in the body. Metastatic breast cancer, or metastasis, most often occurs in the bones, lungs, liver and brain, but can show up in other areas of the body. A breast cancer metastasis is still considered breast cancer, regardless of where it may spread. For example, breast cancer metastasis that spreads to the liver is not liver cancer.

Metastatic Disease