False-positive human chorionic gonadotropin levels caused by a heterophile antibody with the immunoradiometric assay.
A case of a false-positive test for the beta-subunit of human chorionic gonadotropin as performed by the immunoradiometric assay is described. Further studies revealed that this problem was secondary to a cross-reacting heterophile antibody.
D000910:Antibodies, Heterophile / Q000276:immunology*; D000911:Antibodies, Monoclonal / Q000276:immunology; D006063:Chorionic Gonadotropin / Q000097:blood* / Q000276:immunology; D018997:Chorionic Gonadotropin, beta Subunit, Human; D003429:Cross Reactions; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008875:Middle Aged; D010446:Peptide Fragments / Q000097:blood* / Q000276:immunology; D011247:Pregnancy; D011863:Radioimmunoassay
D000910:Antibodies, Heterophile; D000911:Antibodies, Monoclonal; D006063:Chorionic Gonadotropin; D018997:Chorionic Gonadotropin, beta Subunit, Human; D010446:Peptide Fragments