What is anal cancer?
A person with anal cancer has abnormal cells in the anus that multiply out of control. These cells can form tumors and spread to other parts of the body. The exact cause of anal cancer is unknown, but genetics may play a role in the determination of risk.

What are the symptoms of anal cancer?
Symptoms of anal cancer include swelling, discharge, pain and bleeding from the anus.

How does the doctor treat anal cancer?
Treatment for anal cancer usually includes some combination of surgery, chemotherapy, and radiation therapy.