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CDH6 expression in CC. High immunoreactivity for CDH6 in (A) normal biliary epithelium (large intrahepatic bile ducts) and (D) exemplary in one intrahepatic cholangiocarcinoma. Low immunoreactivity for CDH6 in (B) one extrahepatic cholangiocarcinoma and (C) one intrahepatic cholangiocarcinoma. Original magnification: 50x, 200x (inset).
