title: Cancer in chronic perianal fistulas of Crohn's disease.
authors.forename: A M
authors.initials: AM
authors.lastname: Vernava
mesh_terms: D000230:Adenocarcinoma / Q000209:etiology*; D001005:Anus Neoplasms / Q000209:etiology*; D002908:Chronic Disease; D003424:Crohn Disease / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012003:Rectal Fistula / Q000150:complications*