Which arteries are most likely to be affected in giant cell arteritis (GCA) (temporal arteritis)?

Updated: Sep 03, 2020
  • Author: Mythili Seetharaman, MD; Chief Editor: Herbert S Diamond, MD  more...
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In GCA, vertebral arteries are more likely affected than internal carotid arteries, especially in the extradural portion, where there is more elastic tissue. [139] The vertebral and external carotid arteries (including the superficial temporal artery) may show vasculitic changes of alternating stenotic segments or occlusion. The internal carotid arteries may be occluded, but they rarely demonstrate a characteristic vasculitic pattern.

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