MUC5AC and lobular neoplasia: Regarding the average patient age, proteinuria, serum creatinine, blood urea nitrogen, hematuria, levels of serum complements, proportions of serum anti-dsDNA detection, SLEDAI, renal pathological AI of the renal biopsy, and pathological classes of LN, there was no obvious difference between the patients with TBM-C4d-positive staining and those with TBM-C4d-negative results (Tables 2, 3).