A#2427 #ACR23 @RheumNow PR3+ cell abundance higher in prolif LN, more than membranous. Mostly in tuberulointerstitium Density of PR3+ higher in glomueruli of prolif LN Correlates with activity, not chronicity Urinary PR3 predict renal fxn loss at 3y @jhrheumatology @andreafava https://t.co/vvC8lgZgWO