ACR/EULAR classification criteria for giant cell arteritis
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When to use
Evidence of medium- or large-vessel vasculitis on imaging
No
Yes
Alternative diagnoses mimicking vasculitis are excluded
No
Yes
Age ≥ 50 years at the time of diagnosis
No
Yes
Morning stiffness in shoulders/neck
No
Yes
Sudden visual loss
No
Yes
Jaw or tongue claudication
No
Yes
New temporal headache
No
Yes
Scalp tenderness
No
Yes
Abnormal examination of the temporal artery absent or diminished pulse, tenderness, or hard Cord-like appearance)
No
Yes
Maximum erythrocyte sedimentation rate ≥ 50 mm/hour or maximum C-reactive protein ≥ 10 mg/L before initiation of treatment
No
Yes
Positive temporal artery biopsy or halo sign on temporal artery ultrasound
No
Yes
Bilateral axillary involvement luminal damage, such as stenosis, occlusion, or aneurysm)
No
Yes
Fluorodeoxyglucose-positron emission tomography activity throughout descending thoracic and abdominal aorta fluorodeoxyglucose uptake in the arterial wall greater than liver uptake by visual inspection)
No
Yes
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