A case of mature teratoma with a falsely high serum estradiol value measured with an immunoassay
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Mayumi Hosokawa
Abstract
Background: Immunoassays (IAs) are widely used to measure concentration of serum estradiol (E2) despite some limitations including cross-reactivity. Liquid chromatography-tandem mass spectrometory (LC-MS/MS) for E2 measurement has a theoretically greater specificity and sensitivity than IAs. We report a case with unexpected discrepancy in E2 values measured by IA and LC-MS/MS.
Case presentation: A 7-year-old girl was referred because of an ovarian tumor. Physical examinations revealed prepubertal statuses. Serum E2 with ECLIA was 69 pg/mL. GnRH stimulation test revealed a prepubertal response. On imaging studies, the diagnosis was mature teratoma of the right ovary. After tumor enucleation, the diagnosis was pathologically confirmed. E2 with ECLIA decreased to 11 pg/mL. Preoperative E2 with LC-MS/MS was 1.15 pg/mL.
Conclusions: We conclude the preoperative E2 with ECLIA was falsely high. We speculate the antibody used in ECLIA had cross-reactivity to endogenous compounds. LC-MS/MS should be considered when high serum E2 measured with IA is inconsistent with physical and/or endocrinological data.
References
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©2016 by De Gruyter
Artikel in diesem Heft
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- A case of mature teratoma with a falsely high serum estradiol value measured with an immunoassay
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Artikel in diesem Heft
- Frontmatter
- Review
- Medullary thyroid carcinoma: a review on ethical considerations in treatment of children
- Original Articles
- Monocyte chemoattractant protein 1 and macrophage migration inhibitory factor in children with type 1 diabetes
- Organ-specific autoimmunity in relation to clinical characteristics in children with long-lasting type 1 diabetes
- Seasonality of diagnosis of type 1 diabetes mellitus in the Netherlands (Young Dudes-2)
- Health-related quality of life in children and adolescents with type 1 diabetes mellitus from Montenegro: relationship to metabolic control
- Relation of fetuin A levels with cardiac, subcutaneous lipid accumulation and insulin resistance parameters in Turkish obese children
- Prooxidant-antioxidant balance in patients with phenylketonuria and its correlation to biochemical and hematological parameters
- Serum vaspin concentrations in girls with anorexia nervosa
- Effect of intramuscular cholecalciferol megadose in children with nutritional rickets
- Focus on BMI and subclinical hypothyroidism in adolescent girls first examined for amenorrhea or oligomenorrhea. The emerging role of polycystic ovary syndrome
- Absence of a relationship between thyroid hormones and vitamin D levels
- Parathyroid hormone-ionized calcium dynamics over the first year of life
- Biochemical markers of bone turnover in children with clinical bone fragility
- Adipocytokines and bone metabolism markers in relation to bone mineral values in early pubertal boys with different physical activity
- Bone mineral density in young Chilean patients with type 1 diabetes mellitus
- Case Reports
- A case of mature teratoma with a falsely high serum estradiol value measured with an immunoassay
- Leigh syndrome associated with a novel mutation in the COX15 gene
- More than one way to skin a thyroid. Managing pediatric hypothyroidism with weekly intramuscular levothyroxine
- First case report of rare congenital adrenal insufficiency caused by mutations in the CYP11A1 gene in the Czech Republic
- Arg924X homozygous mutation in insulin receptor gene in a Tunisian patient with Donohue syndrome
- Corrigendum
- Corrigendum to: Exposure to sunshine early in life prevented development of type 1 diabetes in Danish boys
