Persistent primitive dorsal ophthalmic artery associated with paraclinoid internal carotid artery aneurysm

Abstract

Case: A 55-year-old woman presented with a coincidental unruptured asymptomatic aneurysm originating from the left supero-lateral wall of the supraclinoid segment of the ICA (Fig. 1). This aneurysm was located on the anterior clinoid process. Left internal carotid angiography showed that the ophthalmic artery (OA) arose from the intracavernous portion of the ICA and entered the orbital cavity via the superior orbital fissure (SOF). This was also confirmed with high resolution multi detector CT and could be recognized as a persistent of the ILT (infero lateral trunk).