Summary
A boy with a left-hemispheric cerebellar astrocytoma had upbeat nystagmus exhibiting increasing-velocity slow phases. The nystagmus improved after excision of the tumour.
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Traccis, S., Rosati, G., Aiello, I. et al. Upbeat nystagmus as an early sign of cerebellar astrocytoma. J Neurol 236, 359–360 (1989). https://doi.org/10.1007/BF00314382
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DOI: https://doi.org/10.1007/BF00314382