A Case Report of Isolated Oculomotor Nerve Nucleus Infarct: A Rare Cause of Parinaud's Syndrome.

Parinaud's syndrome, also known as dorsal midbrain syndrome, includes multiple clinical signs, with the most prominent being paralysis of upward gaze. This syndrome has most commonly been described in association with pineal region masses. Other relatively common causes of this syndrome include hydrocephalus, intrinsic midbrain masses, and ischemic lesions. MRI is very helpful in determining the cause and thus guiding appropriate treatment.