In particular, light microscopy showed diffuse mesangial expansion with focal areas of hypercellularity, moderate glomerulosclerosis and chronic tubulointerstitial disease, immunofluorescence showed segmental IgA deposition in the mesangium and capillary loops, and electron microscopy showed occasional mesangial and intramembranous electron-dense deposits. The gene discussed is CD79A; the disease is glomerulosclerosis.