FIG 1. Types of occlusion were defined on MRA, as follows: a + c was an occlusion of the ICA at the neck accompanied by an MCA embolism, or ICA/MCA occlusion; b, occlusion of the intracranial bifurcation of the ICA, or carotid T occlusion, which included one of 17 cases with an occlusion of the proximal anterior and middle cerebral artery; c, occlusion of the MCA trunk, which included nine of 48 occlusions of the bifurcation or trifurcation lateral to the medial lenticulostriate arteries; and d, occlusion of a single or multiple MCA branch occlusion with free trifurcation, which included three of 36 cases with an additional occlusion of the peripheral anterior cerebral artery.