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Department of Neurosurgery, Dokuz Eylül University, Izmir, Türkiye Persistent trigeminal artery that leads blood flow rostrocaudally between the primitive internal carotid artery and the parallel longitudinal neural plexus during embryogenic development, may sometimes be associated with other vascular anomalies due to the same congenital developmental cerebrovascular disturbance. Persistent trigeminal artery and aneurysm combination is most frequently seen, but the association with arteriovenous malformation is rare. A 12-year old girl with a right parietal arteriovenous malformation which led to intracerebral and intraventricular haemorrhage, was admitted with a left hemiparesis involving the face. After successful excision of the arteriovenous malformation, the left hemiparesis improved and persistent trigeminal artery had disappeared on late control carotid angiogram. This rare association is discussed with the relevant literature. Keywords : Carotid-basilar anastomosis, cerebral arteries, persistent trigeminal artery, vascular malformations