Figure 3.

Biopsy findings. (a–c) Patient 3, full-house category. (a) Light microscopy (periodic acid-Schiff [PAS] stain) showing capillary wall double contours with deposit (black arrow) and endocapillary hypercellularity (red arrows). (b) Immunofluorescence microscopy (IgG immune staining) showing diffuse granular capillary wall deposit. (c) Electron microscopy showing abundant subendothelial and mesangial deposits (arrows). (d–f) Patient 9, quasi-full-house category. (d) Light microscopy (PAS stain) showing glomerulitis and slight mesangial hypercellularity. (e) Immunofluorescence microscopy (C1q immune staining) showing segmental mesangial and capillary wall staining. (f) Electron microscopy showing subendothelial and mesangial electron-dense deposits (arrows). Bars = (a,b,d,e) 50 μm and (c,f) 2 μm.