COMPARATIVE STUDY
JOURNAL ARTICLE

Time to menarche and final height after histrelin implant treatment for central precocious puberty

David Gillis, Gilad Karavani, Harry J Hirsch, David Strich
Journal of Pediatrics 2013, 163 (2): 532-6
23485026

OBJECTIVE: To compare final height, change in body mass index (BMI), and time from end of treatment until menarche in girls with central precocious puberty treated with the histrelin implant versus depot gonadotropin releasing hormone agonist injections.

STUDY DESIGN: Chart review, interview, and final height measurements of 2 groups of girls with central precocious puberty; triptorelin depot (TD) group: 23 girls were treated from age 8.4 ± 0.3 with monthly injections of TD, for 26.7 ± 2.5 months; histrelin implant group: 11 girls were treated from age 8.7 ± 0.3 years for 28.4 ± 3.7 months, of whom 9 initially received monthly TD injections for 1.5-39 months. Final height, BMI (pretreatment vs recent), and time between either implant removal or last injection to menarche were compared.

RESULTS: Time between removal of implant or last injection and menarche was 9.3 ± 1.5 (histrelin implant group) versus 16.1 ± 1.7 (TD group) months (P = .02). Predicted height at implant insertion was 156.8 ± 2.6 cm, and final height was 161.1 ± 2.0 cm (not significant [NS]). Predicted height for TD was 155.2 ± 1.9 cm and final height was 157.9 ± 1.7 cm (NS). Change from onset of treatment to final BMI-SDS for histrelin implant was -0.41 ± 0.3, and for TD was -0.03 ± 0.2 (NS).

CONCLUSIONS: Menarche occurred sooner after implant removal. There was no difference in final height or BMI outcomes between the 2 treatment modalities.

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