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Intracranial meningiomas after high-dose irradiation
D Soffer1, J M Gomori, T Siegal
1Department of Pathology, Hadassah University Hospital, Jerusalem, Israel.
Cancer
|April 15, 1989
Summary
High-dose radiation therapy can lead to the development of specific types of brain tumors called meningiomas years later. Early-life radiation exposure appears to increase the risk of aggressive, malignant meningiomas.
Area of Science:
- Neuro-oncology
- Radiation Oncology
- Pathology
Background:
- Therapeutic high-dose irradiation is used for primary brain tumors.
- Secondary intracranial meningiomas are rare but significant complications.
Observation:
- Three cases of intracranial meningiomas developing 12-20 years post-high-dose irradiation are presented.
- Patients received radiation at a young mean age (9.4 years).
- Latent period ranged from 2-47 years (mean 19.8 years).
Findings:
- Meningiomas post-high-dose irradiation represent a recognizable clinical entity.
- These tumors occur at a younger age compared to spontaneous meningiomas.
- A high proportion are malignant and aggressive, particularly with early-life exposure.
- Malignant transformation appears more likely than benign tumor induction.
Implications:
- High-dose radiation may contribute to meningioma pathogenesis.
- Early-life radiation exposure is a risk factor for aggressive secondary meningiomas.
- Understanding this link is crucial for long-term patient monitoring and risk assessment.