Anal high-risk human papillomavirus infection, squamous intraepithelial lesions and anal cancer in patients with inflammatory bowel disease: a systematic review and meta-analysis.

The incidence of anal cancer is higher in UC than in CD, with the exception of perianal CD. There is limited and heterogenous data on anal high-risk human papillomavirus infection and squamous intraepithelial lesions prevalence in this population.