EULAR/PReS endorsed consensus criteria for the classification of childhood vasculitides.

EULAR/PReS endorsed consensus criteria for the classification of childhood vasculitides S Ozen, N Ruperto, M J Dillon, A Bagga, K Barron, J C Davin, T Kawasaki, C Lindsley, R E Petty, A M Prieur, A Ravelli, P Woo 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-Schonlein purpura (HSP), Kawasaki disease (KD), childhood polyarteritis nodosa (PAN), Wegener\u2019s 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 \u2018\u2018granulomatous\u2019\u2019 and \u2018\u2018nongranulomatous.\u2019\u2019 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. Ann Rheum Dis 2006;65:936\u201394