Anal cancer is a type of cancer that develops in the cells of the ****, which is the opening at the end of the ****. It is a relatively rare form of cancer, accounting for less than 2% of all gastrointestinal cancers.
The main risk factors for anal cancer include infection with the human papillomavirus (HPV), a weakened immune system, engaging in receptive anal intercourse, having multiple ****ual partners, and smoking.