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The patient is a 19-year-old female who presents with hematuria, nephrotic range proteinuria, and a creatinine of 1.2 mg/dL. She has a recent diagnosis of systemic lupus erythematosus. Figure 1 shows a normal glomerulus without "spikes" and "holes" of the glomerular basement membranes. Figure 2 shows no significant interstitial fibrosis. Figures 3, 4, 5, & 6 shows IgG, kappa, lambda, and C1q respectively. Image 7 and 8 shows subepithelial deposits. This is a case of membranous lupus nephritis (ISN/RPS Class V). By definition, no proliferative changes (crescents, fibrinoid necrosis, endocapillary hypercellularity) are seen within the glomeruli in a pure class...