Tolosa-Hunt Syndrome With Proptosis Mimicked by Giant Aneurysm of Posterior Cerebral Artery

Abstract
• A case of chronic, steroid-responsive, painful ophthalmoplegia demonstrated proptosis and nodularity of the intracavernous carotid artery. However, the responsible lesion was an aneurysm of the posterior cerebral artery confined to the posterior fossa and definable only by vertebral angiography.