High serum MBL level was reported to be associated with thrombocytopenia and seizure in patients with SLE [22], and serum MBL was reported to be positively correlated with Birmingham Vasculitis Activity Score in patients with antineutrophil cytoplasmic antibody-associated vasculitis [23]. The gene discussed is MBL2; the disease is anti-neutrophil cytoplasmic antibody-associated vasculitis.