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Histological images of obstructed kidneys of rats with UUO. (A) Periodic acid-Schiff (PAS) staining of sham-operated kidney (Sham) and obstructed kidney (UUO). There was obvious renal tubular damage on days 7 and 14. Scale bar: 100 μm. (B) Masson’s trichrome staining microphotographs of sham-operated kidney (Sham) and obstructed kidney (UUO). Focal fibrotic changes on day 7 became severe on day 14. Scale bar: 100 μm.
