title: Acute perforated appendicitis--an unusual variant simulating acute acalculous cholecystitis.
authors.affiliation: Department of Radiology, Auckland Hospital, New Zealand.
authors.forename: R H
authors.initials: RH
authors.lastname: Evans
authors.forename: R F
authors.initials: RF
authors.lastname: Colbert
mesh_terms: D000208:Acute Disease; D000368:Aged; D001064:Appendicitis / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D002764:Cholecystitis / Q000175:diagnosis*; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D007416:Intestinal Perforation / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D014463:Ultrasonography