For prostate cancer there are 4 stages. Often the stages 1 to 4 are written as the Roman numerals I, II, III and IV. Generally, the higher the stage number, the more the cancer has spread. The stages can be further divided into A, B or C.
The most widely used staging system for prostate cancer is the AJCC (American Joint Committee on Cancer) TNM system. For prostate cancer there are 4 stages. Often the stages 1 to 4 are written as the Roman numerals I, II, III and IV.
This first prostate diagram shows the whole urinary tract system from the kidneys, down through the two ureters into the bladder, through the urethra tube passing inside the prostate gland and out the penis. That is why it sure feels good to go when you gotta go!