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Uptodate Reference Title
Arterial wall edema in giant cell arteritis
Arterial wall edema in giant cell arteritis
Ultrasound showing circumferential dark areas about the vascular lumens of the common superficial temporal artery and its parietal branch ("halo signs") in a patient with GCA. The halo sign results from hypoechogenicity of the vessel wall, attributed to mural edema.
GCA: giant cell arteritis, also known as Horton disease, cranial arteritis, and temporal arteritis.
