title: Atlanto-axial rotatory fixation: improved demonstration using spiral CT.
abstract: Atlanto-axial rotatory fixation (AARF) is an uncommon condition which is often missed at presentation because of its rarity and the relative subtlety of plain film X-ray findings, but early detection and appropriate management are vital for a cure. We describe three cases in which the use of spiral computed tomography scanning with 3D and sagittal reconstructions greatly aided diagnosis and management. The 3D images gave a more graphic picture of the overall alignment of the upper cervical spine and the skull base, while the sagittal reconstructions demonstrated the presence or absence of compensatory atlanto-occipital subluxation. The literature is briefly reviewed.
authors.affiliation: Department of Radiology, Burwood Hospital Spinal Injury Unit, Christchurch, New Zealand.
authors.forename: I A
authors.initials: IA
authors.lastname: Cowan
authors.forename: G S
authors.initials: GS
authors.lastname: Inglis
mesh_terms: D000293:Adolescent; D001268:Atlanto-Axial Joint / Q000000981:diagnostic imaging / Q000293:injuries*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D004204:Joint Dislocations / Q000150:complications / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014103:Torticollis / Q000209:etiology