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[Radiation effects in brain and spinal cord (author's transl)]
Strahlentherapie
|September 1, 1978
Summary
Radiation therapy can injure the brain and spinal cord at all ages, especially when combined with methotrexate. High radiation doses increase central nervous system injury risk, with over 60% of spinal cord radiolesions proving fatal.
Area of Science:
- Neuroscience
- Radiation Oncology
- Radiopathology
Context:
- Central nervous system (CNS) radiation sensitivity varies across developmental stages (prenatal, postnatal, infancy, adulthood).
- Combined treatments, such as radiation therapy with methotrexate, can influence CNS radiation effects.
- High-energy radiation doses in adults elevate the risk of severe CNS injury.
Purpose:
- To analyze radiation necrosis incidence, injury degrees, and frequencies across different dosage ranges, considering age and sex.
- To examine spinal cord tolerance doses using Strandquist diagrams and the Ellis formula.
- To report regression line slopes for skin, brain, and spinal cord responses to radiation therapy.
Summary:
- Radiation-induced CNS injuries, particularly spinal cord radiolesions, can be progressive and fatal in adults (>60%).
- Pathogenesis and predisposing factors for radiation necrosis are discussed.
- Strandquist diagrams and Ellis formula aid in evaluating spinal cord tolerance doses.
- Regression line slopes indicate organ-specific responses to radiation, with similar slopes observed for skin and spinal cord necroses under equivalent injury levels.
Impact:
- Provides critical data for optimizing radiation therapy protocols to minimize CNS damage.
- Enhances understanding of age-dependent radiation sensitivity in the brain and spinal cord.
- Informs clinical decision-making regarding radiation dosage and treatment strategies to mitigate long-term neurological sequelae.