Fig. 1.

(A) Two glomeruli show segmental necrotizing lesions and are involved by cellular crescents compressing the glomerular tufts. A periglomerular inflammatory infiltrate is present (Jones silver stain; original magnification ×100). (B) A glomerulus involved by a circumferential cellular crescent (Jones silver stain; original magnification ×600). (C) IF staining revealed finely granular staining of 2+ intensity for IgG predominantly in glomerular capillary walls but also involving a few mesangial regions (original magnification ×200).