Background/Purpose: Recently, a joint group of the American College of Rheumatology (ACR) and the European Alliance of Associations for Rheumatology (EULAR) proposed new criteria for Takayasu arteritis (TAK) (the 2022 ACR/EULAR criteria). This study applied the 2022 ACR/EULAR criteria to patients with previously diagnosed TAK based on the 1990 ACR criteria and investigated the concordance rate between the two criteria according to the four imaging modalities.

Methods: This study reviewed the medical records of 179 patients who met the 1990 ACR criteria for TAK. The imaging modalities included conventional angiography, computed tomography (CT) angiography, fluorodeoxyglucose-positron emission tomography (FDG-PET), and magnetic resonance (MR) angiography.

Results: Regardless of the imaging modalities, the concordance rate between the two criteria was 85.5% when including all patients, whereas, it increased to 98.1% when only patients aged ≤60 years were included. Among the four imaging modalities, CT angiography exhibited the highest concordance rate between the two criteria (85.6%). The concordance rate among patients aged >60 years was 95.7%. Only one patient aged 50—60 years was reclassified as having both TAK and giant cell arteritis (GCA).

Conclusion: The concordance rate was 85.5% regardless of the imaging modalities, and increased to 86.9% on simultaneous CT angiography and FDG-PET imaging. We suggest that the upward readjustment of the age requirement should be reconsidered not to miss patients with TAK over the age of 60.

« Back to ACR Convergence 2023

ACR Meeting Abstracts - https://acrabstracts.org/abstract/application-of-the-2022-acr-eular-criteria-for-takayasu-arteritis-to-previously-diagnosed-patients-based-on-the-1990-acr-criteria/