Idiopathic adulthood ductopenia

This is a low power view of a liver biopsy using a CK7 cytokeratin immunostain specific for biliary epitheium from a patient with idiopathic adulthood ductopenia. The central vein is in the center of the slide with portal triads visible at the periphery. There is no well defined bile duct present. The brown staining in the area of the portal triads represents focal ductular proliferation.