Fig. 2

In the light microscope, glomerulus was hypertrophy (a, HE staining), and segmental mesangial proliferation(b, PASM staining) could be observed. b. In the electronic microscope, few electronic density deposited in the mesangial area (c), but increased lysosomes could be observed in proximal tubules (d). Note: The immunofluorescent results were all negative for IgG, IgA, IgM, C3, C4, C1q