32 year old woman with seizures and left hemicranial headaches was found to harbor a subcortical arteriovenous malformation in the left parietal lobe. A, Left carotid arteriography confirmed the presence of the AVM with multiple nidal aneurysms (arrow). B, Under local anesthesia only, a 0.5 mm diameter microcatheter is placed in close proximity to the arteriovenous malformation for injection of anesthetic agents, Amytal and lidocaine, for purposes of provocative neurological testing (arrow). Testing is performed in conjunction with members of the Neuropsychology service both to determine the risk of causing neurological deficits at embolization and surgical resection. In this case, no changes in neurological function were identified. C, Fluoro-radiography of the cranium following occlusion of the AVM with n-butyl-cyanoacrylate (NBCA “glue”) shows radio-opaque glue filling of the sinusoids within the AVM nidus (arrow). D, Control arteriography following occlusion of the AVM shows complete obliteration of the AVM nidus and no other branch vessel occlusion (arrow). The patient tolerated embolization and resection without any complication and returned to work in nine days.