Breast Cancer: TNM Staging

Staging is a process that doctors use to describe how far a cancer has spread.

 

Although there are several methods of staging, most doctors use the TNM method. The TNM method is based on the size of the tumor (T), the spread of the cancer into nearby lymph nodes (N), and the spread of the cancer to other body parts (M, for metastasis).

 

TNM Staging Labels Chart