Light microscopic analysis (A-D) and electron microscopy analysis (E,F) Light microscopic analysis (A-D) and electron microscopy analysis (E,F). A : A glomerulus showed podocyte hyperplasia (open arrowhead). Periodic acid-Schiff stain. B : Segmental glomerulosclerosis in perihilar lesion was observed in two glomeruli. This glomerulus contained perihilar hyalinosis (arrowheads). Periodic acid silver methenamine stain. C : Many glomerulus showed double contours of capillary walls (arrows). Periodic acid silver methenamine stain. D : Mild arteriolosclerosis were found (open arrows). Masson trichrome stain. E : Electron-dense deposits was observed within the mesangial and para-mesangial region (open arrows). F : A few electron-dense deposits were found within subendothelial space (arrows), but their densities looked sparser than typical dense deposits, implying that these deposits appeared to be formed previously.