title: Diagnosis of tumors of the parotid gland with anti-CEA immunoscintigraphy.
abstract: Twenty-nine consecutive patients with a palpable unilateral tumor in the parotid gland region had scintigraphy 22-28 hr after they were injected with 111In-labeled monoclonal anti-carcinoembryonic antigen (CEA) antibody (F023C5). Two patients were imaged at 48 hr also, and one patient was imaged additionally with single-photon emission CT. Twenty-seven of the patients had surgery within 2-3 weeks. The serum CEA concentrations were normal in 27 of 29 patients. Immunoglobulin G human anti-murine-antibody concentrations were elevated in three of 20 patients. Ten patients had scintigraphic findings suggesting a malignant tumor, six of them had histologically proved malignant tumors. The tumors associated with positive immunoscintigrams were stained immunohistochemically with anti-CEA, and four of the malignant tumors were positive in immunohistochemical staining. The results suggest that nonspecific anti-CEA-antibody imaging is helpful in predicting the presence of a malignant tumor in the parotid area. The radioantibody method could provide useful clinical information that has a high negative predictive value.
authors.affiliation: Department of Clinical Chemistry, Helsinki University Central Hospital, Finland.
authors.forename: K J
authors.initials: KJ
authors.lastname: Kairemo
authors.forename: E V
authors.initials: EV
authors.lastname: Hopsu
mesh_terms: D000328:Adult; D000368:Aged; D000911:Antibodies, Monoclonal; D002272:Carcinoembryonic Antigen / Q000032:analysis / Q000276:immunology*; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis; D007205:Indium Radioisotopes; D008297:Male; D008875:Middle Aged; D010307:Parotid Neoplasms / Q000000981:diagnostic imaging* / Q000276:immunology; D011237:Predictive Value of Tests; D011877:Radionuclide Imaging
chemical_list: D000911:Antibodies, Monoclonal; D002272:Carcinoembryonic Antigen; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007205:Indium Radioisotopes