title: Perianal Crohn's disease: overview.
authors.affiliation: Department of Clinical Science, L. Sacco University Hospital, Milan, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Ardizzone
authors.forename: G Bianchi
authors.initials: GB
authors.lastname: Porro
mesh_terms: D001004:Anus Diseases / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D003424:Crohn Disease / Q000150:complications* / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D015994:Incidence