Rectal pressure: Causes and when to see a doctor
Anal Cancer: How to Diagnose, Staging & Treatment - Dana-Farber Cancer Institute | Boston, MA
When cancer cells form into benign or malignant tumors in the tissues of the anus, anal cancer has occurred. The anus is the opening at the bottom of your intestines where stool exits the body. Anal cancer is rare, but when it occurs, it may spread to other parts of the body. Some noncancerous forms of anal cancer can also turn cancerous over time. If you have any of the below symptoms and risk factors, talk to your doctor about your concerns. There are various forms of anal cancer, each defined by the type of tumor that develops. A tumor is an abnormal growth in the body.
Anal pre-cancer (anal intraepithelial neoplasia)
The inner lining of the anal canal is the mucosa. Most anal cancers start from cells in the mucosa. Glands and ducts tubes leading from the glands are found under the mucosa. The glands make mucus, which acts as a lubricating fluid.
The rate of progression from pre-cancer to cancer is not known, but may be of the order of 1 in per year for HIV negative people and 1 in per year for those with HIV. Grade 3 is regarded as more serious than grade 2. Many AIN1 lesions are entirely benign and never progress. Most people are likely to be unaware they have the condition, unless they have special tests performed on the anus It has been estimated that around 1 in such men will progress to cancer each year.