title: Defects of the pedicle and spondylolisthesis of the second cervical vertebra.
mesh_terms: D002574:Cervical Vertebrae / Q000002:abnormalities*; D002675:Child, Preschool; D006801:Humans; D008297:Male; D011859:Radiography; D013123:Spinal Fusion; D013168:Spondylolisthesis / Q000000981:diagnostic imaging* / Q000601:surgery; D013169:Spondylolysis / Q000000981:diagnostic imaging