Stages and grades of breast cancer

The stage tells you how big your cancer is and whether it has spread. The grade means how abnormal the cells look under a microscope.

The TNM system is a way of staging breast cancer. TNM stands for Tumour, Node, Metastasis. It is the most common way to stage breast cancer in the UK.

The stage of a cancer tells you how big it is and how far it has spread. There are 4 number stages for breast cancer - stage 1, stage 2, stage 3 and stage 4.