Fourth Nerve Palsy Due to Neurocysticercosis.

Neurocysticercosis is the most common disease of the nervous system caused by a parasite. Ophthalmological manifestations of cysticercosis typically are due to direct intraorbital or intraocular involvement, parenchymal brainstem involvement, or secondary to hydrocephalus or increased intracranial pressure. We describe a patient with a unilateral fourth nerve palsy, a rare presentation of neurocyticercosis.