Atlantooccipital instability. Case report.
A patient is presented who had neck pain and transient episodes of visual-field defect followed by unconsciousness when he hyperextended his neck. Radiographic examination revealed atlantooccipital instability on flexion and extension views. Treatment by fusion of the occiput to C-2 resulted in relief of symptoms.
D000293:Adolescent; D001269:Atlanto-Occipital Joint / Q000002:abnormalities*; D006801:Humans; D004204:Joint Dislocations / Q000209:etiology*; D008297:Male