Light microscopy findings in endocarditis-associated glomerulonephritis

(A) Cellular crescents with necrotizing foci (Jones methenamine silver; original magnification 400x).
(B) Segmental cellular crescent with no underlying proliferation (periodic acid-Schiff; original magnification 400x).
(C) Diffuse crescentic glomerulonephritis (Jones methenamine silver; original magnification 400x).
(D) Acute focal proliferative glomerulonephritis (hematoxylin and eosin; original magnification 400x).
(E) Diffuse proliferative glomerulonephritis (periodic acid-Schiff; original magnification 400x). 
(F) Mesangial proliferative glomerulonephritis (periodic acid-Schiff; original magnification 400x).