The letter “M’ in the TNM breast cancer staging system shows the presence or absence of metastases.
Cancer has either spread beyond the breast and nearby lymph nodes to other areas of the body (M1) or it has not (MO).
Tests for metastases include:
Learn about treatment for metastatic breast cancer.
Learn more about breast cancer staging.
1-877 GO KOMEN(1-877-465-6636)