FIGURE 112.19 Normal pediatric lateral cervical spine radiographs A: Three-month-old child B: Twenty-month-old child A, predental (predontoid) space; B, anterior ring of C1 (note apparent override of C1 over dens); C, posterior ring of C1; D, dens synchondrosis (growth plate); E, posterior element C2; F, normal prevertebral space (C3 level); G, wedged vertebral appearance caused by cartilage artifact; H, intervertebral disc space; I, normal prevertebral space below the glottis (thickened because of radiopaque-collapsed esophagus); and J, vertebral body C7