Fig. 2

DSA shows the left ICA severe stenosis and delayed perfusion in the distal portion of the stenosis (A anteroposterior view, B lateral view). Three dimensional-DSA shows diffuse stenosis with the lumen narrowing from the terminal portion of the ICA to the entire length of M1 (C). The arrows indicate stenosis proximal to the anterior choroidal artery. Arrowheads indicate posterior communicating artery. DSA, digital subtraction angiography; ICA, internal carotid artery