See-saw nystagmus associated with retinitis pigmentosa.

Abstract

See-saw nystagmus is an uncommon form of nystagmus, and its pathophysiology remains poorly understood since the first case reported by Maddox in 1913. 1 Furthermore, see-saw nystagmus associated with retinitis pigmentosa is very rare. To the best of our knowledge, only 2 cases of see-saw nystagmus associated with retinitis pigmentosa have been reported since 1986. 2 Here, I report a case of seesaw nystagmus associated with retinitis pigmentosa. There were no clinical cranial nerve deficits and no cerebellar signs. Magnetic resonance imaging of the brain showed no lesions of the brainstem, cerebellum or evidence of demyelination. This case shows a rare association between see-saw nystagmus and retinitis pigmentosa. It is therefore important to recognise this, and future studies are needed to provide clarity on the underlying mechanism of this clinical entity.