[Ultrastructural study of carcinoembryonic antigen (CEA) using the peroxidase-antiperoxidase (PAP) complex technic in patients with breast cancer].

In the studied material taken from 70 patients with the mammary carcinoma was tried to discover the presence of the CEA antigen in the cells on the ultrastructural level. In studies was used peroxidase-antiperoxidase method (PAP). The product of the immunocytochemical reaction was found on the surface of cell membrane. In 42 patients (60%) positive reaction was observed and in 28 (40%) reaction with PAP complex was negative. Just in 3 cases intracytoplasmic reaction was observed.