Resolution of saccadic palsy after treatment of brain-stem metastasis

A 65-year-old man was unable to generate normal horizontal saccadic eye movements. Smooth pursuit of sinusoidal target motion was normal. The saccadic palsy resolved rapidly, twice, after treatment with intravenous corticosteroids. Computed tomography showed a lesion in the pons, and seven months later he was found to have metastatic adenocarcinoma.