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Prominent interstitial fibrosis without expression of urokinase-type plasminogen activator (uPA) and uPA receptor (uPAR) on podocytes. Note that the fibrosis in the interstitium is prominent (A, Masson's trichrome stain, ×200), while neither uPA (B, ×400) nor uPAR (C, ×400) is positive in the podocyte.
