Table 1.

C4d staining in immune complex-mediated GN

Patient	Pathology Diagnosis	C4d	C3	C1q	Ig
1	Chronic MPGN, monoclonal gammopathy associated (κ light chains)	1–2	3	0	κ 3+negative IgG, IgM, IgA, λ
2	MPGN, hepatitis C associated	2	3	0	IgM 3+, IgG 2+, κ 3+, λ 2+
3	MPGN, monoclonal gammopathy associated (IgM κ)	3	3	0	IgM 3+, κ 3+negative IgA, IgG
4	IgA nephropathy	0	1	0	IgA 3+, IgM 1+, κ 2+, λ 2+
5	Lupus nephritis	3	3	1	IgA 2+, IgG 3+, IgM 2+, κ 3+, λ 3+
6	Membranous nephropathy	3	3	0	IgG 3+, κ 3+, λ 3+
7	Membranous nephropathy	3	3	0	IgG 3+, IgM 2+, κ 3+, λ 3+
8	IgA nephropathy	0	2	0	IgA 3+, κ 2+, λ 3+
9	Lupus nephritis	3	3	2	IgA 3+, IgG 3+, IgM 2+, κ 3+, λ 3+
10	MPGN, autoimmune	3	3	2	IgG 3+, IgA 3+, IgM 3+, κ 3+, λ 3+
11	Fibrillary GN	3	3	0	IgG 3+, κ 2+, λ 3+
12	Membranous nephropathy	2	3	0	IgG 3+, κ 3+, λ 3+
13	MPGN (C3GN versus immune complex-mediated)	3	3	0	IgG 1+, κ 1+
14	Lupus membranous, early	2	3	0	IgG 3+, κ 2–3+, λ 2–3+
15	Membranous nephropathy	2	3	0	IgG 3+, κ 3+, λ 3+
16	Lupus nephritis	3	3	3	IgA 3+, IgG 3+, IgM 1+, κ 3+, λ 3+
17	Lupus nephritis	3	2	3	IgA 3+, IgG 3+, IgM 2+, κ 3+, λ 3+
18	Fibrillary GN	3	3	0	IgG 3+, κ 2+, λ 3+