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Observational Study
. 2015 Sep;167(3):674-8.e1.
doi: 10.1016/j.jpeds.2015.05.039. Epub 2015 Jun 18.

Accuracy of Endocrine Tests for Detecting Hypogonadotropic Hypogonadism in Girls

Gerhard Binder  1 , Roland Schweizer  2 , Peter Haber  2 , Gunnar Blumenstock  3 , Regina Braun  2
Affiliations
Observational Study

Accuracy of Endocrine Tests for Detecting Hypogonadotropic Hypogonadism in Girls

Gerhard Binder et al. J Pediatr. 2015 Sep.

Abstract

Objective: To assess the accuracy of inhibin B and the gonadotropin releasing hormone agonist test for the diagnosis of hypogonadotropic hypogonadism (HH).

Study design: We performed a retrospective analysis of data collected 2009-2014 using a strict clinical protocol. All prepubertal nonunderweight girls, aged 13-17.5 years with Tanner breast stage B1/B2 and low estradiol levels, were tested and re-examined at 6-month intervals (n = 21). Constitutional delay of growth and puberty was defined by spontaneous menarche; HH was identified by association with specific causes of HH or no spontaneous progress of puberty during follow-up. Inhibin B was measured using enzyme-linked immunosorbent assay, and follicle-stimulating hormone and luteinizing hormone (basal and stimulated by triptorelin) were measured using a chemiluminescence immunoassay.

Results: The cohort comprised 12 girls with constitutional delay of growth and puberty and 9 girls with HH. The causes of HH included hypopituitarism (n = 3), Prader-Willi syndrome, chromosomal aberration, intellectual disability syndrome with ataxia, and idiopathic causes (n = 2). Each measurement, basal inhibin B <20 pg/mL or stimulated follicle-stimulating hormone (4 hours) <11 IU/L, demonstrated a sensitivity and a specificity of 100% for the detection of HH. Stimulated luteinizing hormone (4 hours) <9 IU/L showed 100% sensitivity but only 83% specificity.

Conclusions: Inhibin B seems to be the ideal measurement for detecting HH in girls. The gonadotropin releasing hormone agonist test is an alternative diagnostic modality, although this approach is more invasive and laborious.

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