Fig. 4From: Langerhans cell histiocytosis confined to extrahepatic bile duct causing sclerosing cholangitis in child: a case reportImmunohistochemical staining of the common bile duct. a Immunohistochemical staining of Langerin. b Immunohistochemical staining of S-100 protein. c Immunohistochemical staining of CD1aBack to article page