Skip to Content. Use the menu to see other pages. Doctors use many tests to find, or diagnose, cancer. They also do tests to learn if cancer has spread to another part of the body from where it started. If this happens, it is called metastasis.
Early Detection, Diagnosis, and Staging
Anal cancer - Symptoms and causes - Mayo Clinic
Sometimes anal cancer causes no symptoms at all. But bleeding is often the first sign of the disease. The bleeding is usually minor. At first, most people assume the bleeding is caused by hemorrhoids painful, swollen veins in the anus and rectum that may bleed. They are a benign and fairly common cause of rectal bleeding. Most often these types of symptoms are more likely to be caused by benign non-cancer conditions, like hemorrhoids, anal fissures, or anal warts. The American Cancer Society medical and editorial content team.
Muscles anal sphincters that surround the anal canal relax to allow waste to leave your body. Anal cancer is an uncommon type of cancer that occurs in the anal canal. The anal canal is a short tube at the end of your rectum through which stool leaves your body.
Anal cancer is a type of cancer that forms in tissues of the anus. The anus is the opening of the rectum to the outside of the body and at the end of the GI tract. Sometimes anal cancer causes no symptoms at all. But bleeding is often the first sign of the disease.