The American Cancer Society estimates that about 8080 new cases of anal cancer (5160 in women and 2920 in men) occurred in 2016. Anal cancer accounts for only 2.4% of all gastrointestinal cancers.

Risk factors for anal cancer include any of the following, with combinations of two or more factors posing particular risk:
Active HPV infection
Smoking
Men having sex with men
Anoreceptive sex
Immunosuppression, with a correlation with low T-cell counts
HIV infection
Organ transplantation
For more on anal cancer, read here.
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Any views expressed above are the author's own and do not necessarily reflect the views of WebMD or Medscape.
Cite this: Elwyn C. Cabebe. Fast Five Quiz: How Much Do You Know About Anal Cancer? - Medscape - Oct 30, 2017.
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