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Objective:  Tomographic and anatomic analysis of cervical vertebrae in children from 0 to 12 years of age to verify the possibility of utilization of lateral mass screws.  Methods:  Twenty-five cervical spine tomographies of children between 0 and 12 years of age, admitted to the emergency room of Hospital das Clínicas of São Paulo were retrospectively analyzed. The following distances were measured: width and length of the lateral masses in the axial section; width and height in the coronal section; height, length and diagonal diameter in the sagittal section. The variables studied were correlated with age and sex and submitted to statistical analysis.  Results:  The analysis of tomographic measurements of 20 patients showed a correlation between age and dimensions of the lateral mass, which were higher after 6 years of age. In relation to sex, greater measures were observed in males in all axes. With regard to the passage of the screws, we only had 22 masses (11%) that prevented their use. However, when stratified by age, we noticed that no patients had restrictions on the use of the lateral mass screw after the age of 6.  Conclusion:  This study analyzed the measurements of 200 lateral masses, making it possible to infer that there is an increase of dimensions with age and in males. Through the data, it was possible to affirm that in this sample, considering the implants available in the market, the lateral mass screws could be used in 89% of the lateral masses

TOMOGRAPHIC ANALYSIS OF SUBAXIAL CERVICAL VERTEBRAE IN CHILDREN BETWEEN 0 AND 12 YEARS