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European Journal of Pediatrics

, Volume 162, Issue 11, pp 776–780 | Cite as

Quantitative calcaneal ultrasound parameters and bone mineral density at final height in girls treated with depot gonadotrophin-releasing hormone agonist for central precocious puberty or idiopathic short stature

  • Simone Kapteijns-van Kordelaar
  • Kees NoordamEmail author
  • Barto Otten
  • Joop van den Bergh
Original Paper

Abstract

To evaluate the effect of gonadotrophin-releasing hormone (GnRH) agonist treatment on bone quality at final height, we studied girls with central precocious puberty (CPP) and with idiopathic short stature (ISS). A total of 25 Caucasian girls were included: group A ( n =14) with idiopathic CPP (mean age at start 7.4 years) and group B ( n =11) with ISS (mean age at start 11.7 years). Treatment duration was 3.8 and 1.7 years respectively. The quantitative ultrasound parameters (QUS) broadband ultrasound attenuation (BUA) and speed of sound (SOS) were measured at the calcaneus (UBIS 3000 device). Lumbar spine bone mineral density (BMD; L2–L4) was measured by dual energy X-ray absorptiometry (DXA) (Hologic QDR1000). Measurements were performed at final height and expressed as Z-scores corrected for bone age. Mean Z-scores of QUS parameters, areal BMD and volumetric BMD (BMDvol) were above −1 in both groups (group A: BUA Z-score −0.21, SOS Z-score −0.29, BMD Z-score 0.02, BMDvol Z-score 0.05, group B: BUA Z-score −0.93, SOS Z-score −0.40, BMD Z-score −0.86, BMDvol Z-score −0.68), although mean Z-scores of BUA and areal BMD in group B were significantly different from zero ( P =0.03 and P =0.02 respectively). Mean Z-score BMDvol was not significantly different from zero ( P =0.05), we found no significant difference between the groups for BMDvol ( P =0.13). Conclusion:although quantitative ultrasound parameters parameters and bone mineral density were normal in girls with central precocious puberty at final height after gonadotrophin-releasing hormone agonist treatment, mean Z-score for broadband ultrasound attenuation and areal bone mineral density were significantly different from zero and mean Z-score for volumetric bone mineral density was (just) not significantly different from zero in idiopathic short stature girls with normal puberty treated with gonadotrophin-releasing hormone agonists. Therefore we cannot say that this treatment is safe in these girls with regard to bone health.

Keywords

Bone mineral density Central precocious puberty Gonadotrophin-releasing hormone agonist Idiopathic short stature Quantitative ultrasound parameters 

Abbreviations

BMD

bone mineral density

BMDvol

volumetric bone mineral density

BMI

body mass index

BUA

broadband ultrasound attenuation

CPP

central precocious puberty

DXA

dual X-ray absorptiometry

GnRH

gonadotrophin-releasing hormone

ISS

idiopathic short stature

QUS

quantitative ultrasound

SDS

standard deviation score

SOS

speed of sound

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Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • Simone Kapteijns-van Kordelaar
    • 1
  • Kees Noordam
    • 1
    Email author
  • Barto Otten
    • 1
  • Joop van den Bergh
    • 2
  1. 1.Department of Paediatric EndocrinologyA University Medical CentreNijmegen The Netherlands
  2. 2.Department of Internal MedicineSint MaartensgasthuisVenlo The Netherlands

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