Carolina Medeiros Rimkus1,2, Vernica Arajo Zanardi3, Alberto Cliquet Jr2
1Radiology and Diagnostic Imaging, State University of Campinas, Sao Paulo, SP, Brazil; 2Orthopaedics Department, State University of Campinas, Campinas, SP, Brazil; 3Radiology and Diagnostic Imaging, State University of Campinas, Campinas, SP, Brazil
Some aspects of the craniocervical junction malformations are trully congenital. But the chronical instability and the articular overload imposed by the skeletal deformities add biomechanical disturbances that can be correlated to acquired disorders. 20.7% of the patients presented atlanto-axial subluxation, correlated to morphological abnormalities classified as manifestations of the occipital vertebrae. Signals of degeneration of the atlanto-axial joints were shown in 42.6%, correlated to atlanto-occipital assimilation.