title: Hypoplasia of C-1 in children with Down syndrome.
authors.forename: Arnold H
authors.initials: AH
authors.lastname: Menezes
mesh_terms: D001268:Atlanto-Axial Joint / Q000002:abnormalities* / Q000000981:diagnostic imaging; D001270:Cervical Atlas / Q000002:abnormalities* / Q000000981:diagnostic imaging; D002648:Child; D004314:Down Syndrome / Q000150:complications* / Q000453:epidemiology; D006801:Humans; D011859:Radiography; D013130:Spinal Stenosis / Q000453:epidemiology / Q000209:etiology* / Q000503:physiopathology