title: Carcinoembryonic antigen in malignant pleural effusions. A negative report.
mesh_terms: D002272:Carcinoembryonic Antigen / Q000302:isolation & purification*; D006801:Humans; D008175:Lung Neoplasms / Q000276:immunology*; D010996:Pleural Effusion / Q000276:immunology*
chemical_list: D002272:Carcinoembryonic Antigen