The morphological phenotypic aspects of C3 glomerulopathy may be either those of DDD, characterized by dense osmiophilic deposits, or those of C3 glomerulonephritis (C3GN), which isolated deposits of C3 with absent or scanty deposits of immunoglobulins (2, 8, 9). The gene discussed is C3; the disease is complement 3 glomerulopathy.