Atlanto-axial subluxation in Down syndrome.
D000293:Adolescent; D000328:Adult; D001268:Atlanto-Axial Joint; D002648:Child; D002675:Child, Preschool; D004314:Down Syndrome / Q000150:complications*; D006801:Humans; D004204:Joint Dislocations / Q000150:complications* / Q000000981:diagnostic imaging; D011859:Radiography