The stage of a cancer describes its size and how far it has spread. The results of your tests help your doctors decide on the stage. You and your doctors can then talk about the best treatment choices for you.
Your doctors also look at the grade of the cancer and your PSA level (see below). This helps them to decide the risk group you are in to help plan your treatment.
Doctors often use the TNM staging system or a number staging system for prostate cancer.