Anal ulceration.
D000368:Aged; D001004:Anus Diseases / Q000175:diagnosis*; D001528:Behcet Syndrome / Q000175:diagnosis; D003424:Crohn Disease / Q000175:diagnosis; D005401:Fissure in Ano / Q000175:diagnosis; D006801:Humans; D013587:Syphilis / Q000175:diagnosis; D014456:Ulcer