ANCA-associated vasculitis analysis of 6 European registries, 3868 pts (2434 GPA, 1434 MPA), age ~57 yrs. Identified 5 clusters: 3 w/ renal dz a) variable ANCA, Hi CRP & Cr; b) MPO+; c) PR3+ & 2 extrarenal 1) PR3+ multisystem; 2) ENT w/ low CRP. Clusters better predicted outcomes… https://t.co/XZcSZ6lGjH https://t.co/yEg64YGTrA