Immunofluorescence microscopy of glomerular capillaries showing location of IgG

(A) Circulating anti-GBM antibodies with linear immunofluorescence staining of GBM.
(B) Glomerular immune complex localization with granular immunofluorescence staining.
(C) Circulating ANCA with paucity of glomerular immunofluorescence immunoglobulin staining.