Fig. 1.
(A) Kidney biopsy with two glomeruli: one showing advanced tuft collapse (left lower corner) and the other with capillaries showing a double contour appearance. PAS stain, magnification 200×. (B and C) Segment of a glomerulus with thickened, double-contoured capillaries and increased mesangial matrix with entrapped fragmented red blood cells. H & E (B) and PAS stain (C), magnification 400×.