Superior divisional oculomotor nerve palsy caused by midbrain neurocysticercosis.

Superior divisional oculomotor nerve palsy caused by intrinsic brainstem disease occurs rarely. We herein report, to our knowledge, the first case of midbrain neurocysticercosis presenting as isolated superior divisional paresis of the oculomotor nerve. A 25-year-old woman presented with acute onset of headache and ptosis-upgaze palsy of the right eye. Results of the CT scan and MRI of the brain were compatible with neurocysticercosis at the left midbrain. She was dramatically responded to albendazole treatment. The diagnosis was confirmed by positive enzyme-linked immunosorbent assay (ELISA) test for cysticercus in her serum.