Abstract Background and Aims The clinical significance of the morphological patterns glomerular injury each IgG subclass in proliferative glomerulonephritis (GN) with monoclonal immunoglobulin deposits (PGNMID) is not well understood. Literature suggests that PGNMID certain histological features such as membranous or mesangio-proliferative non-IgG3 staining may be associated a more favourable r...