Ultrastructural evaluation of carcinoembryonic antigen (CEA) using an immunocytochemical method with the peroxidase-antiperoxidase (PAP) complex technic in patients with laryngeal cancer

Peroxidase-antiperoxidase complex method (PAP) was used to reveal the CEA antigen in the larynx carcinoma cells by means of electron microscope. Studies were carried out on the material taken from 8 patients with the larynx carcinoma. In all cases positive immunoperoxidase reaction has been observed. The product of the reaction has been found on the surface of the cells. In one case intracytoplasmic positive reaction has been noticed.