title: Rotary fixation of the atlantoaxial joint.
abstract: Rotary fixation of the atlanto-axial joint is a rare disorder in which the atlas gets fixed in a position normally achieved during rotation. A persistent asymmetrical position of the dens in relation to the atlas during head rotation is the clue to the diagnosis. Rotary fixation can be demonstrated by radiography/fluoroscopy and computed tomography (CT). However it is easily overlooked, largely by inattention. We present a typical case in an adult in whom the rotary fixation was demonstrated by radiography/fluoroscopy and CT.
authors.affiliation: Department of Radiology, Ghent University Hospital, Ghent, Belgium.
authors.forename: G
authors.initials: G
authors.lastname: De Temmerman
mesh_terms: D000328:Adult; D001268:Atlanto-Axial Joint / Q000000981:diagnostic imaging / Q000293:injuries*; D019416:Head Movements; D006801:Humans; D008297:Male; D012399:Rotation; D014057:Tomography, X-Ray Computed