immunohistochemical evaluation was carried out using a peroxidase-antiperoxidase technique and specific antibodies against surfactant high molecular weight glycoproteins , keratin proteins , iga + secretory piece , carcinoembryonic antigen ( cea ) , human chorionic gonadotropin ( hcg ) , and alpha-fetoprotein ( afp ) .
C0017968
glycoproteins
C0007082
carcinoembryonic antigen