Successful treatment of pyoderma gangrenosum with concomitant immunoglobulin A nephropathy: A case report and review of literature

Figure 3 Light microscopy of the biopsied kidney tissue. The mesangial area is moderately enlarged due to an increase in mesangial cells (black arrow) and the matrix. Endothelial cells (green arrow) show diffuse proliferation and degeneration. Infiltrated neutrophils (red arrow) are present [hematoxylin and eosin (HE) staining, × 200].