title: [Imitation of an Anderson type II dens fracture by a motion artefact in computed tomography : Four case examples].
abstract: Computed tomography (CT) is the method of choice in the diagnosis and classification of odontoid fractures with a sensitivity of more than 99 % and a specificity almost equally as high. In this article we report on four cases where CT-generated motion artefacts exactly mimicked an Anderson type II fracture of the dens axis, initially leading to a wrong diagnosis. Although this seems to be a very rare event, these cases indicate that overlooked CT motion artefacts can lead to severe consequences and attention must be paid to the radiological signs outlined in this report.
authors.affiliation: Abteilung für Unfallchirurgie, Berufsgenossenschaftliche Unfallklinik Murnau, Prof.-Kuentscher-Str. 8, 82418, Murnau am Staffelsee, Deutschland. Mario.Morgenstern@bgu-murnau.de.
authors.forename: M
authors.initials: M
authors.lastname: Morgenstern
authors.affiliation: Abteilung für Unfallchirurgie, Berufsgenossenschaftliche Unfallklinik Murnau, Prof.-Kuentscher-Str. 8, 82418, Murnau am Staffelsee, Deutschland.
authors.forename: J
authors.initials: J
authors.lastname: Friederichs
authors.affiliation: Abteilung für Radiologie, Berufsgenossenschaftliche Unfallklinik Murnau, Murnau am Staffelsee, Deutschland.
authors.forename: C
authors.initials: C
authors.lastname: Gärtner
authors.affiliation: Abteilung für Unfallchirurgie, Berufsgenossenschaftliche Unfallklinik Murnau, Prof.-Kuentscher-Str. 8, 82418, Murnau am Staffelsee, Deutschland.
authors.forename: V
authors.initials: V
authors.lastname: Bühren
authors.affiliation: Abteilung für Unfallchirurgie, Berufsgenossenschaftliche Unfallklinik Murnau, Prof.-Kuentscher-Str. 8, 82418, Murnau am Staffelsee, Deutschland.
authors.forename: O
authors.initials: O
authors.lastname: Gonschorek
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016477:Artifacts; D003937:Diagnosis, Differential; D003951:Diagnostic Errors / Q000517:prevention & control; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008297:Male; D009038:Motion; D009809:Odontoid Process / Q000000981:diagnostic imaging* / Q000293:injuries*; D056888:Patient Positioning / Q000379:methods; D016103:Spinal Fractures / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*
keywords: Anderson II; Computed tomography; Dens axis; Motion artefact; Swallowing