|Anal cancer is highly treatable and often curable mostly in the early ages. Its first sign is bleeding. It is often discovered by pathologist. Anal cancer starts in the anus. Anal cancer is fairly rare, much less common than cancer of the colon or rectum. Most squamous cell anal cancers are linked to infection with the human papillomavirus (HPV)|
|Antibody is a protein molecule produced by the immune system in the blood to fight diseases by attacking and killing harmful bacteria.|
Apoptosis is also called programmed cell death. Apoptosis is a genetically regulated process leading to the death of cells.