Staging is the process of finding out how far the cancer has spread. This is very important because your treatment and the outlook for your recovery depend on the stage of your cancer. If you have anal cancer, ask your doctor to explain staging in a way that you understand. Knowing all you can about staging lets you take a more active role in making informed decisions about your treatment.
The staging system used for anal cancer describes the spread of the cancer through the layers of the wall of the anus. It also takes into account spread to nearby organs or to organs farther away.
Stages are often labeled using Roman numerals 0 through IV (0-4). As a rule, the lower the number, the less the cancer has spread. A higher number, such as stage IV (4), means a more advanced cancer.
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