Subluxation of the atlas causing spinal cord compression in a case of Down's syndrome with a "manifestation of an occipital vertebra".
D001269:Atlanto-Occipital Joint / Q000002:abnormalities* / Q000000981:diagnostic imaging; D001270:Cervical Atlas / Q000002:abnormalities*; D002648:Child; D004314:Down Syndrome / Q000150:complications* / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging; D011859:Radiography; D013117:Spinal Cord Compression / Q000209:etiology*; D013122:Spinal Diseases / Q000150:complications* / Q000000981:diagnostic imaging