When Crohn's disease is not Crohn's disease.
D000328:Adult; D002169:Campylobacter Infections / Q000175:diagnosis*; D002168:Campylobacter fetus; D003424:Crohn Disease / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D007079:Ileitis / Q000175:diagnosis*; D008297:Male