title: False-positive hemagglutination inhibition tests for pregnancy with tubo-ovarian abscess.
abstract: A 21% incidence of false-positive hemagglutination inhibition tests for pregnancy associated with tubo-ovarian abscess is described. Five illustrated cases and the causes for such false-positive reactions are discussed. Substances generated by pelvic inflammatory masses may interfere with immunologic assays for pregnancy, resulting in misdiagnosis or inappropriate management.
mesh_terms: D000038:Abscess / Q000175:diagnosis*; D000328:Adult; D003937:Diagnosis, Differential; D005184:Fallopian Tube Diseases / Q000175:diagnosis*; D005189:False Positive Reactions; D005260:Female; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D010049:Ovarian Diseases / Q000175:diagnosis*; D011247:Pregnancy; D011259:Pregnancy Tests, Immunologic