Congenital atlanto - axial dislocations.
D000293:Adolescent; D000328:Adult; D001368:Axis, Cervical Vertebra; D001270:Cervical Atlas; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D004204:Joint Dislocations / Q000151:congenital* / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D011859:Radiography