Pubertal Development Following Paediatric Gonadotoxic Treatment and Immature Testicular Tissue Banking

Emily Delgouffe1, Marius Regin1,2, Veerle Vloeberghs3

  • 1Genetics, Reproduction and Development (GRAD) Research Group, Brussels Health Campus/Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel (VUB), Laarbeeklaan 103, 1090 Brussels, Belgium.

Insights

Testicular tissue banking (TTB) is a safe fertility preservation method for prepubertal boys undergoing gonadotoxic treatments. Studies show TTB does not harm testicular function or structure, enabling normal puberty and testosterone production.

Area of Science:

  • Reproductive Medicine
  • Paediatric Oncology
  • Endocrinology

Background:

  • Paediatric gonadotoxic treatments pose risks to male fertility.
  • Prospective data on pubertal development post-treatment are limited.
  • Immature testicular tissue banking (TTB) is an experimental fertility preservation option for prepubertal boys, but its long-term safety and interaction with treatments require further investigation.

Purpose of the Study:

  • To systematically evaluate the long-term safety and effects of TTB on pubertal development in boys treated for malignant or non-malignant conditions.
  • To assess the impact of gonadotoxic treatments and TTB on testicular structure, function, and hormonal profiles.
  • To provide multidimensional data on pubertal development in this cohort.

Main Methods:

  • Single-centre prospective cohort study of 23 boys (2017-2025), with 15 undergoing TTB.
  • Repeated assessments included pubertal staging, testicular volumes, parenchymal integrity, reproductive hormones (luteinising hormone, follicle-stimulating hormone, inhibin B, anti-Müllerian hormone, testosterone), bone age, and bone density.
  • Median follow-up was 4.0 years.

Main Results:

  • Gonadotoxic treatments, especially myeloablative conditioning, were linked to reduced post-pubertal testicular volumes and altered hormone profiles (elevated LH/FSH, reduced inhibin B).
  • Anti-Müllerian hormone levels remained stable.
  • All patients experienced spontaneous puberty and preserved testosterone production.
  • Testicular parenchyma integrity was unaffected by biopsy; volume reductions were comparable between biopsied and non-biopsied testes.

Conclusions:

  • TTB appears safe, with no discernible adverse effects on testicular structure or function.
  • The procedure does not impede spontaneous puberty or testosterone production.
  • Larger multicentric prospective studies are necessary to validate these findings and confirm TTB safety in paediatric populations.

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