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  • Title: [Fractures of the atlantoaxial complex in the elderly: assessment of radiological spectrum of fractures and factors influencing imaging diagnosis].
    Author: Lomoschitz FM, Blackmore CC, Stadler A, Linnau KF, Mann FA.
    Journal: Rofo; 2004 Feb; 176(2):222-8. PubMed ID: 14872376.
    Abstract:
    OBJECTIVE: To describe patterns of atlantoaxial fractures in a population of consecutive elderly patients, including assessment of type, distribution and associated clinical and radiological findings, and to analyze any influence of the causative trauma mechanism on the individual fracture pattern. MATERIALS AND METHODS: The distribution and type of 123 atlantoaxial fractures in 95 subjects older than 65 years (range: 65 - 102; mean age: 79 years) were retrospectively assessed. For each subject, trauma mechanism and clinical and neurological status were recorded at admission. Initial imaging studies of the cervical spine were reviewed. Preexistent degenerative changes were assessed and the atlantoaxial fractures classified. Data were evaluated for the frequency of different types of fractures of C1 and C2 and for accompanying fractures of cervical vertebrae or the occipital condyles, respectively. RESULTS: The majority of patients with injuries of the atlantoaxial complex had fractures of C2 (90 of 95, 95 %). A large proportion of these patients (67 of 90, 74 %) had odontoid fractures. An isolated fracture of C1 was present in only 5 (5 %) patients. Associated fractures of the occipital condyles or other cervical vertebrae were rare (10 of 95, 11 %). The main trauma mechanism for atlantoaxial injuries was a fall (56 of 95, 59 %). Elderly patients injured in motor vehicle accidents were more likely to have isolated fractures of C2 and Type III fractures of the odontoid (p < 0.02). CONCLUSION: In elderly patients, fractures of the atlantoaxial complex are mainly caused by falls and almost always involve C2. The trauma mechanism influences the fracture pattern.
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