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(A) Glomerular mesangial expansion and hypercellularity (black arrow) (hematoxylin-eosin, ×200). (B) Strong glomerular mesangial deposits for IgA antisera (immunofluorescence study, ×200). (C) Ultrastructural evaluation revealed immune-type electron-dense deposits involving the mesangium (black arrow) (transmission electron microscopy, ×4,000).
