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Collapsing glomerulopathy, showing collapse of glomerular tuft with overlying hypertrophy and hyperplasia of visceral epithelial cells and marked protein droplets in cases 1–6. Arrow, early segmental collapsing lesion. #1–#4 and #6, Jones methenamine silver; #5, Periodic acid–Schiff; original magnification, ×500 in #1 and ×400 in #2–#6.
