Ultrasound evaluation of the temporal and axillary arteries is currently well recognized in the field of giant cell arteritis (GCA), a disease primarily affecting medium- and large-caliber vessels. Structural ultrasound abnormalities are now well described in this pathology, but their association with relapse and clinical concordance is unknown. There is currently a follow-up score (the OGUS score) for medium- and large-caliber arteries that could also predict the clinical course of the disease.
Major patient
Patients meeting ACR 2022 criteria for giant cell arteritis.
No opposition expressed
Patients unable to understand the protocol, under guardianship or curatorship.
Patients not affiliated to the French Social Security system.
All patients with giant cell arteritis at disease diagnosis
Cohort
Prospective
Not listed
Relapse according to EULAR 2018 criteria
Relapse is defined with European League Against Rheumatism recommendations according to major or minor relapse criteria.
Relapse according to EULAR 2018 criteria
Relapse is defined with European League Against Rheumatism recommendations according to major or minor relapse criteria.
Clinical parameter : Age
One Clinical parameter is defined with the dichotomised variable : age \> 50 years (YES) and age \<=50 years (NO)
Other prognostic marker : C-Reactive Protein
Pronostic markers are defined with C-Reactive Protein (in mg/L)
OMERACT Giant Cells arteritis Ultrasonography Score (OGUS)
It is a score for ultrasound monitoring of temporal arteries by measuring the intima media complex of 8 vascular sites (common temporal trunk, frontal and parietal branches, axillary arteries). If OGUS score is \>= 1, the criteria is YES, if OGUS score \< 1, the criteria is NO
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