title: CA125 antigen levels in obstetric and gynecologic patients.
abstract: An immunoradiometric assay using a monoclonal antibody detects an antigenic determinant (CA125) that is present in more than 80% of epithelial ovarian cancers. CA125 levels are elevated in the sera of 16% of women in the first trimester of pregnancy and is found in very high concentration in amniotic fluid. In 988 nonpregnant patients with benign gynecologic disorders, CA125 was greater than 65 U/mL in 1% on a single determination and in 0.5% with two determinations. Given the low rate of positivity in benign gynecologic disease, the CA125 assay may deserve further evaluation for the early detection of ovarian carcinoma.
mesh_terms: D000328:Adult; D000368:Aged; D000653:Amniotic Fluid / Q000276:immunology; D000911:Antibodies, Monoclonal / Q000276:immunology; D000951:Antigens, Neoplasm / Q000032:analysis*; D015295:Antigens, Tumor-Associated, Carbohydrate; D000939:Epitopes / Q000032:analysis*; D005260:Female; D005831:Genital Diseases, Female / Q000276:immunology*; D006801:Humans; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000276:immunology; D011247:Pregnancy; D011863:Radioimmunoassay
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D015295:Antigens, Tumor-Associated, Carbohydrate; D000939:Epitopes