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By toluidine blue and immunohistochemistry we identified mast cells in other models of liver injury. (A) Toluidine blue positive mast cells are found in the rat liver following 70% PH (3 days) and in normal rats fed taurocholic acid for 1 week (B). (C) In human livers from patients with PSC coupled with cirrhosis mast cells are shown by toluidine blue staining. Red arrows mark mast cells. Images are 20× and 10× magnification.
