Case report identifies nine syndrome with distinct neurological symptoms, suggesting a need for awareness.
Internuclear ophthalmoplegia with ipsilateral horizontal gaze palsy is called one and a half syndrome. There are a number of numerical one and a half spectrum disorders. One such syndrome is nine syndrome, which is characterized by one and a half syndrome, ipsilateral lower motor neuron type facial palsy, and contralateral hemiparesis or hemihypesthesia or hemiataxia. Here we describe a case of nine syndrome with left one and a half syndrome, left lower motor neuron type facial palsy, and right hemiataxia.
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Anandan et al. (2026) studied this question.
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