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Fig. 14. —59-year-old woman with multifocal great vessel stenoses due to Takayasu's arteritis (TA). Maximum-intensity-projection coronal MR angiogram shows occlusion of right brachiocephalic artery (arrow), severe stenosis of right subclavian artery (single arrowhead), and occlusion of proximal left subclavian artery (double arrowheads). Subclavian arteries are reconstituted by collateral vessel formation bilaterally. Note relatively proximal great vessel involvement; whereas giant cell arteritis may have imaging appearance similar to that of TA, lesions are usually located more distally in latter disorder.