Background: There has been a lack of appropriate classification criteria for vasculitis in children.
Objective: To develop a widely accepted general classification for the vasculitides observed in children and specific and realistic classification criteria for common childhood vasculitides (Henoch-Schönlein purpura (HSP), Kawasaki disease (KD), childhood polyarteritis nodosa (PAN), Wegener’s granulomatosis (WG), and Takayasu arteritis (TA)).
Methods: The project was divided into two phases: (1) the Delphi technique was used to gather opinions from a wide spectrum of paediatric rheumatologists and nephrologists; (2) a consensus conference using nominal group technique was held. Ten international experts, all paediatricians, met for the consensus conference. Agreement of at least 80% of the participants was defined as consensus.
Results: Consensus was reached to base the general working classification for childhood vasculitides on vessel size. The small vessel disease was further subcategorised into “granulomatous” and “non-granulomatous.” Final criteria were developed to classify a child as HSP, KD, childhood PAN, WG, or TA, with changes introduced based on paediatric experience. Mandatory criteria were suggested for all diseases except WG.
Conclusions: It is hoped that the suggested criteria will be widely accepted around the world because of the reliable techniques used and the international and multispecialist composition of the expert group involved.
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- ACR, American College of Rheumatology
- ANCA, antineutrophil cytoplasmic antibodies
- ESPN, European Society of Paediatric Nephrology
- EULAR, European League against Rheumatism
- HSP, Henoch-Schönlein purpura
- KD, Kawasaki disease
- NGT, nominal group techniques
- PAN, polyarteritis nodosa
- PReS, Paediatric Rheumatology European Society
- TA, Takayasu arteritis
- WG, Wegener’s granulomatosis
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