Detailed information on how the digestive system works, including a full-color, labeled illustration of the digestive system.
The anus is the last part of the digestive tract. Learn more about its anatomy, including where anal cancer is likely to start.
Anal cancer is cancer that starts in the cells of the anus. Learn more about this type of cancer.
A risk factor is anything that may increase your chance of having a disease. Learn about the risk factors for anal cancer.
Sometimes anal cancer does not cause any symptoms at all. Bleeding from your rectum is the most common symptom of anal cancer.
Screening tests are done to check for diseases in people who don't have symptoms. A digital rectal exam may be used to screen for anal cancer.
People who have AIDS are much more likely to get certain types of cancer than people without the disease.