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Radiation-induced growth hormone deficiency
1Department of Endocrinology, Christie Hospital NHS Trust, Manchester, UK.
Hormone Research
|February 5, 2003
Summary
External irradiation can cause anterior pituitary hormone deficiency, particularly affecting the hypothalamus. The severity and onset of hypopituitarism depend on the radiation dose and location.
Area of Science:
- Endocrinology
- Oncology
- Radiation Oncology
Background:
- External irradiation for various cancers and conditions can impact the hypothalamic-pituitary axis.
- Anterior pituitary hormone deficiencies are a known sequela of radiation therapy involving this axis.
Purpose of the Study:
- To investigate the relationship between external irradiation and anterior pituitary hormone deficiency.
- To understand the dose-dependency and site of radiation damage in the hypothalamic-pituitary axis.
Main Methods:
- Review of patient cases receiving radiation therapy impacting the hypothalamic-pituitary axis.
- Analysis of radiation dose and its correlation with pituitary hormonal deficits.
- Assessment of the primary site of radiation-induced damage (hypothalamus vs. pituitary).
Main Results:
- Radiation doses to the hypothalamic-pituitary axis can lead to deficiency in one or more anterior pituitary hormones.
- Lower doses may result in isolated growth hormone deficiency, while higher doses can cause hypopituitarism.
- The onset of hormone deficit is dose-dependent, with the hypothalamus being the primary site of damage.
Conclusions:
- External irradiation is a significant cause of anterior pituitary hormone deficiency.
- Radiation-induced hypopituitarism is dose-dependent and primarily affects the hypothalamus.
- Understanding these effects is crucial for managing patients undergoing radiation therapy.