title: Misperception of estrogen activity in patients treated with an estrogen receptor antagonist.
abstract: Measurement of estradiol is an important marker of ovarian function. At low levels, accurate measurement has been difficult because of unique characteristics of immunoassay kits. We present this case to emphasize the importance of accurate estimation of estrogen activity and estradiol levels to avoid unnecessary surgical intervention.
authors.affiliation: Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University Hospitals Case Medical Center, Cleveland, OH. Electronic address: sonia.elguero@uhhospitals.org.
authors.forename: Sonia
authors.initials: S
authors.lastname: Elguero
authors.affiliation: Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University Hospitals Case Medical Center, Cleveland, OH.
authors.forename: Bansari
authors.initials: B
authors.lastname: Patel
authors.affiliation: Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University Hospitals Case Medical Center, Cleveland, OH.
authors.forename: James H
authors.initials: JH
authors.lastname: Liu
mesh_terms: D000328:Adult; D001943:Breast Neoplasms / Q000097:blood / Q000188:drug therapy*; D004958:Estradiol / Q000031:analogs & derivatives* / Q000097:blood* / Q000627:therapeutic use; D020847:Estrogen Receptor Modulators / Q000627:therapeutic use*; D005260:Female; D000077267:Fulvestrant; D006801:Humans; D011933:Reagent Kits, Diagnostic
chemical_list: D020847:Estrogen Receptor Modulators; D011933:Reagent Kits, Diagnostic; D000077267:Fulvestrant; D004958:Estradiol
keywords: estradiol; estrogen activity; immunoassay; postmenopausal