Total alleviation of downbeat nystagmus in basilar impression by transoral removal of the odontoid process.
The presence of primary position downbeat nystagmus indicates disease at the cervicomedullary junction where craniovertebral anomalies are commonly encountered. This paper reports a patient whose only symptom was disabling oscillopsia and downbeat nystagmus secondary to basilar impression and Arnold-Chiari malformation. He experienced total resolution of his symptoms following transoral removal of the odontoid process. In the past it was felt that ocular signs and symptoms did not improve with surgery for craniovertebral anomalies. In light of this report, the ocular symptoms of craniovertebral anomalies may be considered indications in themselves for surgical intervention.
D000328:Adult; D001139:Arnold-Chiari Malformation / Q000150:complications; D001368:Axis, Cervical Vertebra / Q000601:surgery*; D006801:Humans; D008297:Male; D009055:Mouth / Q000601:surgery*; D009759:Nystagmus, Pathologic / Q000150:complications / Q000601:surgery*; D010985:Platybasia / Q000150:complications*