Abstract 463: When Small Vessels Become a Big Problem: Ruptured Arteriovenous Malformation from Lenticulostriate Artery

Cerebral arteriovenous malformations (AVMs) are rare vascular abnormalities resulting from embryonic errors, characterized by direct arterial‐to‐venous shunts without intervening capillaries. They carry a prevalence of 0.014%‐0.028% in patients under 20 years of age and often present with spontaneous hemorrhage. Their typical anatomy includes “feeding arteries,” “draining veins,” and an abnormal cluster of vessels, or “nidus,” between them. We present the case of a healthy 10‐year‐old girl who developed obstructive hydrocephalus secondary to a ruptured AVM, with an interesting anatomical contribution from arterial feeders originating in the lenticulostriate arteries.