histochemical and immunohistochemical study by the immunoperoxidase technique revealed that most of the tumors ( 13/21 ) contained mucosubstances , and that all examples of the uc were immunoreactive for epithelial membrane antigen ( ema ) , keratin , and carcinoembryonic antigen ( cea ) , thereby indicating the epithelial nature of the neoplastic cells .
C0205698
uc
C1513959
epithelial