PT - JOURNAL ARTICLE AU - Samaniego, Edgar A AU - Dabus, Guilherme AU - Andreone, Vincenzo AU - Linfante, Italo TI - Rare anatomical variations of persistent trigeminal artery in two patients with non-aneurysmal subarachnoid hemorrhage AID - 10.1136/jnis.2010.003665 DP - 2011 Sep 01 TA - Journal of NeuroInterventional Surgery PG - 282--284 VI - 3 IP - 3 4099 - http://jnis.bmj.com/content/3/3/282.short 4100 - http://jnis.bmj.com/content/3/3/282.full SO - J NeuroIntervent Surg2011 Sep 01; 3 AB - Carotid–basilar anastomoses are remnants of the fetal circulation and although rare, they may become symptomatic and should be recognized during cerebral angiography. Two patients are described with non-aneurysmal subarachnoid hemorrhage and persistent trigeminal arteries (PTA) found on cerebral angiography. In the first patient, the PTA ended in the anterior inferior cerebellar artery (AICA) and posterior inferior cerebellar artery. The second patient had a PTA terminating in the AICA and superior cerebellar artery. These rare anatomical PTA variants should be recognized on cerebral angiography.