title: Carcinoembryonic antigen: immunohistologic identification in invasive and intraepithelial carcinomas of the lung.
abstract: A total of 58 pulmonary lesions from 48 patients were examined for carcinoembryonic antigen (CEA). The three-layer immunoperoxidase procedure for antigen detection was used with a monospecific anti-CEA antiserum. The control serum was the same antiserum with its specificity removed by affinity chromatography. Normal goat serum was also used as a control. Carcinoembryonic antigen was present in the majority of pulmonary adenocarcinomas and generally absent in the squamous cancers. The major exception was in the well-differentiated squamous lesions where CEA was occasionally found in the keratinizing areas. Of special interest was the finding of CEA in all areas of intraepithelial squamous neoplasia studied.
mesh_terms: D000230:Adenocarcinoma / Q000276:immunology; D002272:Carcinoembryonic Antigen / Q000032:analysis*; D002294:Carcinoma, Squamous Cell / Q000276:immunology; D006651:Histocytochemistry; D006801:Humans; D007124:Immunoenzyme Techniques; D008175:Lung Neoplasms / Q000276:immunology*
chemical_list: D002272:Carcinoembryonic Antigen