CD79A and focal segmental glomerulosclerosis: Ultrastructural results (Figure 1B) revealed that the thickness of the glomerular basement membrane was 180–380 nm, the foot process was segmentally fused, and a few electron-dense deposits were observed in individual mesangial areas.Pathological diagnosis revealed focal segmental glomerulosclerosis (FSGS), and immunofluorescence indicated the presence of IgA deposition.