C3 and lobular neoplasia: Clinical and demographic information collected on 140 patients with biopsy proven lupus nephritis (LN) included age, gender, presence of anti-double-stranded DNA antibodies (dsDNA), serum C3 complement levels (C3C), serum C4 complement levels (C4C), urine protein to creatinine ratio (UrPrCr), and estimated glomerular filtration rate (EGFR).