title: Lower gastrointestinal hemorrhage pathologic physiology and surgical considerations.
mesh_terms: D003137:Common Bile Duct Diseases / Q000150:complications / Q000175:diagnosis; D003937:Diagnosis, Differential; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D006801:Humans; D007410:Intestinal Diseases / Q000150:complications / Q000175:diagnosis; D012002:Rectal Diseases / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery