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Representative renal histopathologic findings of aristolochic acid nephropathy (AAN). Kidney biopsy was performed in 35-year-old female patient suspected AAN. Her initial estimated glomerular filtration rate was 5.3 mL/min/1.73 m2 and she underwent emergent hemodialysis with uremic symptoms. (A) Interstitial inflammatory cell infiltration (H&E, ×400). (B) Severe interstitial fibrosis and tubular atrophy (Trichrome, ×400). (C) Relatively preserved glomeruli (H&E, ×40).
