title: Symptomatic atlantoaxial dislocation in Down syndrome.
mesh_terms: D001368:Axis, Cervical Vertebra / Q000293:injuries*; D001270:Cervical Atlas / Q000293:injuries*; D002648:Child; D004314:Down Syndrome / Q000150:complications*; D006801:Humans; D004204:Joint Dislocations / Q000150:complications* / Q000601:surgery; D008297:Male; D010243:Paralysis / Q000209:etiology; D013117:Spinal Cord Compression / Q000209:etiology