Long-term observation of 87 girls with idiopathic central precocious puberty treated with gonadotropin-releasing hormone analogs: impact on adult height, body mass index, bone mineral content, and reproductive function

Anna Maria Pasquino, Ida Pucarelli, Fabiana Accardo, Vitan Demiraj, Maria Segni, Raffaella Di Nardo
Journal of Clinical Endocrinology and Metabolism 2008, 93 (1): 190-5

OBJECTIVE: We assessed in a retrospective unicenter study the impact of treatment with GnRH analogs (GnRHa) on adult height (AH), body mass index (BMI), bone mineral density (BMD), and reproductive function in girls with idiopathic central precocious puberty (ICPP).

PATIENTS: Eighty-seven ICPP patients were treated with GnRHa for 4.2 +/- 1.6 yr (range 3-7.9) and observed for 9.9 +/- 2.0 yr (range 4-10.6 yr) after discontinuation of treatment; to estimate the efficacy better, 32 comparable ICPP untreated girls were analyzed.

RESULTS: AH was 159.8 +/- 5.3 cm, significantly higher than pretreatment predicted AH (PAH) either for accelerated or for average tables of Bayley and Pinneau. The gain in centimeters between pretreatment PAH and AH was 5.1 +/- 4.5 and 9.5 +/- 4.6 cm, respectively. Hormonal values and ovarian and uterine dimensions, reduced during treatment, increased to normal after 1 yr without therapy. Age of menarche was 13.6 +/- 1.1 yr with an interval of 0.9 +/- 0.4 yr after therapy. Menstrual pattern was normal. Six girls became pregnant and delivered normal offspring. BMI sd score for chronological age increased, but not significantly, before, during, and after therapy. BMD at discontinuation of treatment was significantly lower and increased to control values after gonadal activity resumption.

CONCLUSIONS: GnRHa treatment in ICPP is safe for the reproductive system, BMD, and BMI and helpful in reaching AH close to target height; however, the variability of individual responses suggests that one choose more parameters than increment in height, especially in girls with pubertal onset over 8 yr of age.

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