Fig. 2

Angiographic characteristics of MCA-BAVMs. A Two-dimensional angiogram (left) and three-dimensional angiogram (right) of the ICA show that the BAVM with a simple architecture was supplied only by the MCA (arrow); the only draining vein (arrowhead) is normal, without dilation. B The arterial phase angiogram (left) and venous phase angiogram (right) of the ICA show that the BAVM is supplied only by the MCA (arrow), but it has multiple draining veins (arrowheads), and almost all superficial veins of the hemisphere surface are involved. C Arterial phase angiogram (left) and late arterial phase angiogram (right) of the ICA show that the BAVM is supplied by the MCA and PCA, it has multiple draining veins (arrowheads), and the primary vein (blue arrowhead) is dilated. D Arterial phase angiogram (left) and late arterial phase angiogram (right) of the ICA show a venous aneurysm (forks) on the primary varicose superficial draining vein (arrowhead). E Arterial phase angiogram (left) and venous phase angiogram (right) of the ICA show an intranidal aneurysm (fork in left image) in the BAVM; the arrowhead in right image indicates a superficial draining vein. F Three-dimensional angiogram of the ICA (left) showing that the BAVM is supplied by the MCA, and an aneurysm (arrow) can be seen on the posterior communicating artery. The aneurysm was coiled (right), and the BAVM was partially embolized. Abbreviations: BAVM: brain arteriovenous malformation, ICA: internal carotid artery, MCA: middle cerebral artery, PCA: posterior cerebral artery