Fig. 4From: Brain arteriovenous malformations of the middle cerebral artery region: image characteristics and endovascular treatment based on a new classification systemEVT targeting weak structures of BAVMs. A CT shows subarachnoid hemorrhage (asterisks) in the left Sylvian fissure. B Three-dimensional reconstruction angiogram of the left ICA shows that the BAVM is supplied by the M3 segment with aneurysmal structures (forks) and a venous dilation (arrowhead). C Roadmap navigation angiogram shows the microcatheter (arrow) accessed to the BAVM. D Unsubtracted angiogram of the left ICA showing Onyx casting in the aneurysmal structures (forks). Abbreviations: BAVM: brain arteriovenous malformation, CT: computed tomography, EVT: endovascular treatment, ICA: internal carotid artery, MCA: middle cerebral artery, M3: third segment of the MCABack to article page