Figure 2 Illustration of case 1(A) Magnetic resonance imaging reveals an acute right posterior cerebral artery (PCA) territory infarction. (B) Angiography reveals chronic occlusion of the right intracerebral artery (ICA), and the left ICA flow was considered to supply to the right anterior cerebral artery, middle cerebral artery, and PCA through the anterior communicating artery. (C) Degree of left carotid stenosis is 80% on angiography. (D) Carotid artery stenting (9×50 mm) is performed for left carotid stenosis.