title: Periumbilical pain.
authors.affiliation: Department of Emergency Medicine, Mackay Memorial Hospital, Taipei, Taiwan. yjsu@ms1.mmh.org.tw
authors.forename: Yu-Jang
authors.initials: YJ
authors.lastname: Su
authors.forename: Yen-Chun
authors.initials: YC
authors.lastname: Lai
mesh_terms: D015746:Abdominal Pain / Q000175:diagnosis*; D000208:Acute Disease; D000328:Adult; D001064:Appendicitis / Q000175:diagnosis* / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D008297:Male; D011859:Radiography