IGHG3 and ganglioneuroma: Glomerulonephritides with MC Ig deposits, also known as “Proliferative GN with Monoclonal Immune Deposits (PGNMID)”, have been only recently described, usually as membrano-proliferative GN with IgG3 selective deposition (no immune complexes), with or without an MC κ chain [7,58,59] (Table 2).