When should you order a renal bx in suspected #LN? Active urinary sediment Used to be #UPCR 500g/g or more Abst#772 looked at UPCR 250g/g to 499 71% + LN and half needed Rx esp if Low C3,C4 Black race Petri, Baltimore #lupus #cohort #ACR25 @ACRheum @RheumNow