When we divided the patients with systemic vasculitis into two groups [AAV group and non-AAV groups (including TA and PAN)] and compared the urinary CD163 levels of the two groups, we found that the difference was not statistically significant [AAV median 103.85, IQ (38.25-374.15) vs. non-AAV median 64.45, IQ (32.64-86.95), p = 0.096] (Figure 2(a)). The gene discussed is CD163; the disease is polyarteritis nodosa.