Isolated Oculomotor Nerve Palsy due to Midbrain Cavernous Malfomation

ABSTRACT

A 36-year-old previously healthy woman developed diplopia and right-sided ptosis. Neurological examinations were normal except for palsy in the right third cranial nerve with pupil involvement. CT and MRI revealed a cavernous hemangioma with recent bleeding in the right midbrain. This case indicates that midbrain cavernous hemangioma can be a rare cause of isolated pupil involving palsy of the third cranial nerve.