[A] a case of MCG; the se section shows one glomerulus with mild mesangial hypercellularity, H & E x 400, [B] a case of FSGS; it shows a lobulated glomerulus with segmental glomerulosclerosis(arrow) and moderate global hypercellularity, H & E x 400. [C] A glomerulus with collapsed tuft, fibrocellular crescent, periglomerular fibrosis, and interstitial inflammation, H & E x 400. [D] A glomerulus with global sclerosis, adhesions (single arrow), fibrous crescent (double arrow) with interstitial inflammation and tubular atrophy, PAS x 400.