title: Sonographic diagnosis of intussusception of the appendix vermiformis.
abstract: We present 2 cases of intussusception of the appendix vermiformis (IAV) in children. Sonographic examination demonstrated a lead point within a characteristic multiconcentric ring sign, and longitudinal sonograms showed the inverted appendix protruding into the cecal lumen. A contrast-enema study, using a water-soluble contrast medium, was performed in each case, and a "coiled-spring" sign or "spiral shell" appearance confirmed the diagnosis. A surgical reduction of the appendix and an appendectomy were performed in each case.
authors.affiliation: Division of Pediatric Surgery, University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria.
authors.forename: W
authors.initials: W
authors.lastname: Pumberger
authors.forename: M
authors.initials: M
authors.lastname: Hörmann
authors.forename: G
authors.initials: G
authors.lastname: Pomberger
authors.forename: U
authors.initials: U
authors.lastname: Hallwirth
mesh_terms: D001062:Appendectomy; D001065:Appendix / Q000000981:diagnostic imaging*; D002429:Cecal Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D002675:Child, Preschool; D003287:Contrast Media; D004733:Enema; D005260:Female; D005471:Fluoroscopy; D005500:Follow-Up Studies; D006801:Humans; D007443:Intussusception / Q000000981:diagnostic imaging* / Q000601:surgery; D008297:Male; D014463:Ultrasonography
chemical_list: D003287:Contrast Media