Fig. 3

Pathological findings and Immunohistochemical staining of the recipient’s extrahepatic bile duct. a Hematoxylin and eosin staining of the recipient’s extrahepatic bile duct. b,c Enlarged view of duct tissue within the black box in a, with diffuse infiltration by eosinophils cells characterized by grooved and convoluted nuclei with scattered chromatin texture (white arrows). d Immunohistochemical staining for Langerin. e Immunohistochemical staining for S-100 protein. f Immunohistochemical staining for CD1a