Introduction, epidemiology and classification of vasculitis

Area of Science:

• Rheumatology
• Immunology
• Epidemiology

Background:

• Traditional vasculitis classification relies on vessel size, predating modern diagnostics.
• Existing American College of Rheumatology (ACR) criteria (1990) are outdated due to advances like ANCA testing and advanced imaging (MRI, PET).
• The Chapel Hill Consensus Conference offered a framework, but a modern system is required.

Purpose of the Study:

• To highlight the limitations of current vasculitis classification criteria.
• To introduce the upcoming DCVAS study and its contribution to modern vasculitis classification.
• To discuss the current understanding and gaps in vasculitis epidemiology.

Main Methods:

• Review of historical and current classification systems for vasculitis.
• Discussion of epidemiological data and population-specific variations in vasculitis occurrence.
• Highlighting the impact of diagnostic advancements on classification.

Main Results:

• Current classification criteria are inadequate for contemporary clinical studies.
• The DCVAS study is set to release new, modern classification criteria within two years.
• Epidemiological knowledge of vasculitis is growing, but significant data gaps persist, particularly in developing regions.
• Specific vasculitides like giant cell arteritis and ANCA-associated vasculitis show population-specific prevalence patterns.
• Kawasaki disease disproportionately affects young Asian populations, being a leading cause of acquired heart disease in this demographic.

Conclusions:

• The evolution of diagnostic technologies necessitates updated vasculitis classification.
• The forthcoming DCVAS criteria promise to enhance clinical research and understanding of vasculitis.
• Further epidemiological research is crucial to address knowledge gaps and improve global health outcomes for vasculitis patients.