Lupus patients with cylindruria (N = 5) also had elevated serum levels of MASP2 than that in patients without the parameter (N = 56) (13 414.07 ± 1472.66 vs 12 124.85 ± 605.53 pg/mL, P < .001). The gene discussed is MASP2; the disease is systemic lupus erythematosus.