Colon cancer is caused by anal sex with an infected person, thus anal warts appear which if not treated and removed will morph into Crohn's disease, proctitis and proctocolitis. ColoRectalSTD's pdf.
Colon cancer is caused by anal sex with an infected person, thus anal warts appear which if not treated and removed will morph into Crohn's disease, proctitis and proctocolitis. [ColoRectalSTD's pdf](https://www.ijidonline.com/article/S1201-9712(18)34491-6/pdf).
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