Arteriovenous malformations = Tangle of abnormal blood vessels in the brain or spinal cord AVM are rare, complex vascular structures that can occur within the parenchyma (ie pial malformations), dura, or both. Most commonly patients present with seizures or symptoms resulting from hemorrhage. Presentation: Hemorrhage- 53% Seizures- 20-25% Headaches Learning disorders- thought to be secondary…