Immunohistochemistry in human liver cirrhosis. Immunohistochemistry on serial liver sections obtained from a cirrhotic patient with ductular proliferation. A) Representative images show negative control (C-) and immunostaining for cytokeratin 7 (CK-7), cytokeratin 19 (CK-19) and for SerpinB3. B) Serial liver sections immunostained for SerpinB3, EpCAM, CD-90, CD-34 and CD-117. Original magnification as indicated.