The levels of both serum MASP-1 (median 4245.42 ng/mL; IQR 1735.04, 5354.05 ng/mL) and MASP-2 (median 155.70 ng/mL; IQR 138.70, 178.65) in the M-LN patients were comparable to those of NHCs. This evidence concerns the gene MASP2 and lobular neoplasia.