Fig. 1From: Discordance of light chain isotypes between serum and glomerular deposits in proliferative glomerulonephritis with monoclonal IgG deposits: a case report and review of the literatureLight microscopy findings. There was an increase in mesangial cells and matrix without nodular lesions in periodic acid-Schiff staining (upper panel) or periodic acid-methenamine silver (PAM) staining (middle panel). There was no obvious spike formation under high magnification with PAM staining (lower panel). Bars = 50 μmBack to article page