PMC5678821_01
Histologic findings in the initial biopsy specimen. (a) Light microscopy shows a glomerulus with cellular crescent (black arrow) (Jones silver methenamine stain, original magnification x 400). (b) The same glomerulus shows segmental fibrinoid necrosis (black arrow) (trichome stain, original magnification x 400). Immunofluorescence stains (all magnifications x 400) show staining of glomerular basement membranes for (c) IgG1, (d) kappa light chain, and (e) negative light chain lambda staining.
gr1.jpg
PMC5678821_01_gr1.jpg
fig1
A kidney biopsy was performed (Figure 1).