Case Report: Unilateral Hemispheric Hemorrhage with Bilateral Ptosis and Upgaze Palsy.

Significance: Determining the anatomic location of insult in cases of concurrent bilateral upgaze palsy with bilateral ptosis can be challenging because of the various overlapping pathways and shared functions. It is more commonly related to bilateral oculomotor nerve palsies and myasthenia gravis. However, the possibility of unilateral cerebrovascular events may be overlooked because of the lack of laterality of disease manifestations.

Purpose: This report documents the uncommon presentation of bilateral ptosis and upgaze palsy in unilateral hemispheric hemorrhage with the corresponding clinical and anatomical review.

Case Report: A 46-year-old gentleman presented to the emergency department with left-sided hemiplegia, concurrent bilateral ptosis, and upgaze palsy. He was found to have acute hemorrhagic stroke secondary to significantly elevated blood pressure. Computed tomography of the brain revealed acute extensive intraparenchymal hemorrhage involving the right basal ganglia, frontal lobe, and temporal lobe. There was an extension of hemorrhage into the third ventricle and subarachnoid extension to the Sylvian fissure with obstructive hydrocephalus. An emergency right craniotomy was performed to evacuate the blood clot, and the hydrocephalus subsequently resolved. Post-operatively, bilateral ptosis and upgaze palsy improved and then resolved.

Conclusions: Acute bilateral ptosis and upgaze palsy suggest the possibility of unilateral hemispheric hemorrhage, even though there is no direct involvement of the brainstem and its nuclei.