• See-saw nystagmus has been seen with tumors of the parasellar region and diencephalon, brain-stem vascular lesions, syringobulbia, and after trauma. We report see-saw nystagmus in an adult with a Chiari malformation that was diagnosed by magnetic resonance imaging and confirmed intraoperatively. This patient's condition improved after surgical decompression. An association between see-saw nystagmus and Chiari malformation is potentially important because early diagnosis and decompression may improve neurologic function and prevent further deterioration.
Zimmerman CF, Roach ES, Troost BT. See-saw Nystagmus Associated With Chiari Malformation. Arch Neurol. 1986;43(3):299–300. doi:10.1001/archneur.1986.00520030085024
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