Fig. 1.

Kidney biopsy findings. a Jones Methenamine Silver, magnification × 200. Glomerulus presenting a typical lesion of collapsing variant of focal and segmental glomerulosclerosis. Collapsed capillary loops with overlying podocyte hypertrophy and hyperplasia; b Masson’s Trichrome, magnification × 50. Moderate lesions of tubular atrophy and interstitial fibrosis. Microcystic dilations of renal tubules that are reminiscent of HIVAN lesions. Some lymphocytes may also be noticed on the background