Fig. 2
A Light microscopy showing a broadened fibrillary mesangium without associated hypercellularity. Some capillaries exhibit a double contoured appearance (→). (PAS stain × 400). B and C) Electron microscopy showing that the double contoured appearance seen by light microscopy is due to expansion of the subendothelial space by an electron-lucent, fluffy finely granular material with mesangial interposition. (L: capillary lumen, S: subendothelial space divided into subcompartments)