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Figure 2: MR angiogram of neck and brain perfusion pattern (a) shows markedly hypoplastic carotid and vertebral arterial system; (b) Deficient left internal carotid artery at the level of circle of Willis

Figure 2: MR angiogram of neck and brain perfusion pattern (a) shows markedly hypoplastic carotid and vertebral arterial system; (b) Deficient left internal carotid artery at the level of circle of Willis