The impossible aneurysm Canalicular and orbital apex aneurysms of the ophthalmic artery

Abstract

Aneurysms of the intracanalicular and intraorbital ophthalmic artery are rare but present as a mass lesion compressing the optic nerve and are in the differential diagnosis of the progressive unilateral optic neuropathy of unknown cause. A 44-year-old female presented an 18-month history of progressively worsening visual hallucinations followed by the sudden onset of decreased vision with impaired color vision and optic disc edema with segmental atrophy. Arteriography revealed an aneurysm of the ophthalmic artery at the orbital exit of the optic canal. Visual symptoms and signs fluctuated for six months before stabilizing with a mild residual optic neuropathy.

Key Words:

• aneurysm
• orbital apex
• ophthalmic artery