With regard to the renal disease activity assessed from the cross-sectional analysis in 139 LN patients (63 with LN-A and 76 with LN-IR), a weak correlation was reported between SLEDAI-R and anti-C1q Abs (rho = 0.354; p = 6 × 10−5), while a very good correlation characterized urinary sCD163/creatinuria ratio levels (rho = 0.861; p < 10−15) (Fig. 4A–B). Here, CD163 is linked to lobular neoplasia.