Os odontoideum; a congenital abnormality of the axis; case report.
D001368:Axis, Cervical Vertebra / Q000002:abnormalities*; D001270:Cervical Atlas / Q000002:abnormalities*; D000013:Congenital Abnormalities; D006801:Humans; D013122:Spinal Diseases
ABNORMALITIES; ATLAS AND AXIS/abnormalities