Highlights from the breakout session: vasculitis in paediatric rheumatology.

The 21st International Vasculitis Workshop, held in Barcelona, Spain, from April 7 to 10, 2024, highlighted advances in pediatric vasculitis, focusing on a holistic, multidisciplinary approach. Common childhood vasculitides, including IgA Vasculitis (IgAV) and Kawasaki Disease (KD), were discussed. The Ankara 2008 criteria for IgAV, endorsed by EULAR and PReS, were evaluated for their performance in adults, showing high sensitivity but necessitating further refinement for improved specificity. Studies on genetic associations, such as Human Leukocyte Antigen (HLA) polymorphisms in IgAV, and biomarkers like S100A8/A9, HMGB1, and RAGE, were presented. Kawasaki disease research included novel anti-apolipoprotein A-2 antibodies, showing promise in reducing coronary arteritis. Monogenic vasculitides, such as deficiency of ADA2, were addressed with new consensus-driven recommendations. The workshop underscored the importance of continued research and tailored therapeutic strategies to improve outcomes in pediatric vasculitis, paving the way for advancements in diagnosis, management, and understanding of these complex diseases.