Fig. 6From: Four collateral circulation pathways were observed after common carotid artery occlusionCTA results. CTA showed the occlusion of left CCA. Left ICA, ECA and carotid bifurcation (arrow①(a,b)) were well developed. No abnormality was found in the development of distal arteries. Vertebral artery and thyrocervical trunk (arrow② (a)) which participated in collateral circulation were also developedBack to article page