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Related Experiment Videos

Hypothalamic-pituitary-adrenal function following cranial irradiation

S E Oberfield1, A Nirenberg, J C Allen

  • 1Department of Pediatrics, New York University Medical Center, NY 10016, USA.

Hormone Research
|January 1, 1997
PubMed
Summary

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Cranial radiation therapy can impair hypothalamic-pituitary-adrenal function, leading to reduced cortisol levels and potential adrenal insufficiency in pediatric patients. Further monitoring is recommended for survivors.

Area of Science:

  • Pediatric Oncology
  • Endocrinology
  • Radiation Oncology

Background:

  • Cranial irradiation is a common treatment for pediatric cancers.
  • The hypothalamic-pituitary (HP) axis is sensitive to radiation, potentially affecting adrenal function.
  • Long-term effects of cranial radiation on endocrine function require thorough investigation.

Purpose of the Study:

  • To assess the impact of cranial irradiation on hypothalamic-pituitary-adrenal axis function in pediatric patients.
  • To evaluate cortisol and ACTH responses to corticotropin-releasing factor stimulation.
  • To investigate potential risks of adrenal insufficiency following cranial radiation therapy.

Main Methods:

  • Seventeen patients treated with cranial/craniospinal irradiation underwent testing.

Related Experiment Videos

  • Patients received an intravenous corticotropin-releasing factor (oCRF) stimulation test.
  • Cortisol and ACTH levels were measured at multiple time points post-stimulation.

    • Main Results:

    • Patients exhibited significantly lower baseline and peak cortisol levels compared to controls.
    • Twelve out of seventeen patients had peak cortisol levels below the normal range.
    • ACTH responses were not significantly different, but dehydroepiandrosterone sulfate levels were often reduced.

    Conclusions:

    • Cranial irradiation can lead to impaired HP-adrenal function and reduced cortisol response.
    • Pediatric patients treated with cranial radiation may be at risk for adrenal insufficiency.
    • Long-term endocrine monitoring is crucial for survivors of cranial radiation therapy.