====== Superior hypophyseal artery aneurysm ====== The [[superior hypophyseal artery]] (SHA) forms the largest branching artery arising from the medial wall of the paraclinoid segment of the [[internal carotid artery]] (ICA; encompassing the entire length of the ICA, distal to the proximal dural ring, and including the clinoidal and supraclinoidal segment of ICA, up to the origin of the [[posterior communicating artery]]). [[Paraclinoid aneurysm]]s, arising from either the clinoidal or supraclinoidal segment of the internal carotid artery, constitute 5–14% of all [[intracranial aneurysm]]s ((Guidetti B, La Torre E. Management of carotid-ophthalmic aneurysms. J Neurosurg. 1975 Apr;42(4):438-42. PubMed PMID: 1123662. )) ((Hoh BL, Carter BS, Budzik RF, Putman CM, Ogilvy CS. Results after surgical and endovascular treatment of paraclinoid aneurysms by a combined neurovascular team. Neurosurgery. 2001 Jan;48(1):78-89; discussion 89-90. PubMed PMID: 11152364. )).