CD79A and proliferative glomerulonephritis: The diagnosis mainly depended on renal pathology, which was characterized by diffuse endocapillary proliferative glomerulonephritis under light microscopy, IgA-dominant or codominant immune complex deposits under immunofluorescence and “hump-like” electron-dense deposits in the mesangial area and subepithelium under electron microscopy [1–4].