# Vasculitis syndromes: large vessel vasculitides and ANCA-associated vasculitides from a neuroradiologist’s perspective

## TL;DR

This paper reviews vasculitis syndromes and updated classification criteria from a neuroradiologist's viewpoint.

## Contribution

The paper highlights the updated 2022 ACR/EULAR criteria and emphasizes the role of imaging in diagnosing vasculitis.

## Key findings

- The 2022 classification criteria for vasculitis emphasize diagnostic imaging advancements.
- Key clinical and imaging clues for large vessel vasculitis and AAVs are reviewed.
- Neuroradiologists play a crucial role in identifying vasculitis syndromes.

## Abstract

The 2022 version of the American College of Rheumatology (ACR)-European Alliance of Associations for Rheumatology (EULAR) classification criteria for large vessel vasculitis and antineutrophil cytoplasmic antibody (ANCA)-associated vasculitides (AAVs) was substantially updated from the previous 1990 ACR criteria, with the role of diagnostic imaging significantly increased in accordance with the development of imaging modalities and expanding knowledge of the imaging findings. This review illustrates the basic characteristics of vasculitis syndromes in adults involving large vessels such as Takayasu arteritis, giant cell arteritis, and AAVs, with a brief introduction to the updated 2022 ACR/EULAR classification criteria, along with key clinical and imaging clues from a neuroradiologist’s perspective.