Unusual causes of acute abdomen.
D000006:Abdomen, Acute / Q000209:etiology*; D001064:Appendicitis / Q000175:diagnosis; D002764:Cholecystitis / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D007415:Intestinal Obstruction / Q000209:etiology; D010195:Pancreatitis / Q000175:diagnosis; D010439:Peptic Ulcer Perforation / Q000175:diagnosis