Efficacy of a monthly compared to 3-monthly depot GnRH analogue (goserelin) in the treatment of children with central precocious puberty

H Isaac, L Patel, S Meyer, C M Hall, C Cusick, D A Price, P E Clayton
Hormone Research 2007, 68 (4): 157-63

AIMS: To compare the efficacy of goserelin 10.8 mg (Zoladex LA-ZLA) administered 9-12 weekly with 3.6 mg (Zoladex-Z) given monthly in suppressing pubertal development, and effect on body mass index (BMI).

METHODS: Children with central precocious puberty (CPP) treated with Z (n = 34) or ZLA (n = 28) were studied retrospectively. Pubertal scores and BMI SDS during 24 months' treatment were compared.

RESULTS: To attain adequate pubertal suppression, more patients on ZLA than Z required increase in injection frequency (p = 0.02) and this was so for 7/8 patients with a structural aetiology for CPP on ZLA and 2/8 on Z. A greater proportion of patients on ZLA had BMI >+2 SDS before (p = 0.05), and at 18 and 24 months (p = 0.02 and 0.04). BMI SDS transiently increased during the first 6 months on ZLA (p = 0.04).

CONCLUSION: Both Z and ZLA were effective in suppressing puberty. To achieve adequate suppression, increased injection frequency was more likely with ZLA than Z, and particularly in patients with structural defects. Children with CPP had an elevated BMI at the onset of therapy and ZLA had a transient positive influence on BMI.

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