title: How to diagnose anorectal disease.
mesh_terms: D001004:Anus Diseases / Q000175:diagnosis*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology; D006801:Humans; D010146:Pain / Q000209:etiology; D012002:Rectal Diseases / Q000175:diagnosis*; D012007:Rectum