2022 ACR/EULAR Giant Cell Arteritis Classification Criteria

Applies the 2022 ACR/EULAR weighted classification criteria for giant cell arteritis in patients aged 50 or older with already-diagnosed large-vessel vasculitis after mimics are excluded, scoring clinical, lab, imaging, and biopsy findings, for research classification, not a diagnostic test.

Age at diagnosis (years)

Diagnosis of medium/large-vessel vasculitis with mimics excluded

Positive temporal artery biopsy OR temporal-artery halo on ultrasound (+5)

ESR ≥ 50 mm/h OR CRP ≥ 10 mg/L (+3)

Sudden visual loss (+3)

Morning stiffness in shoulders or neck (+2)

Jaw or tongue claudication (+2)

New temporal headache (+2)

Scalp tenderness (+2)

Abnormal temporal artery on vascular examination (+2)

Bilateral axillary involvement on imaging (+2)

FDG-PET activity throughout the aorta (+2)