Extracranial angiographic findings in giant cell (temporal) arteritis.

Angiograms of 10 patients with giant cell arteritis who had large-artery and aortic abnormalities were reviewed. The affected arteries had multiple stenotic areas, and occlusions were relatively common, usually located at the end of tapered stenotic segments. Bridging collateral arteries usually refilled the distal portion of the occluded artery. The laterations were seen most frequently in the subclavian, axillary, and brachial arters, and the arteriographic lesions reflected the clinical findings. Such arteriographic abnormalities are suggestive of giant cell arteritis in a patient over the age of 50. The differential diagnosis includes Takayasu's disease, arteriosclerosis, thoracic outlet syndrome, and ergotism.