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Intracerebral cavernous malformation induced by radiosurgery. Case report
Yoshiyasu Iwai1, Kazuhiro Yamanaka, Masaki Yoshimura
1Department of Neurosurgery, Osaka City General Hospital, Japan.
Neurologia Medico-Chirurgica
|April 26, 2007
Summary
Gamma knife radiosurgery for brain metastasis may induce cavernous malformations. This case highlights a rare complication of radiation therapy, emphasizing the need for careful diagnosis and monitoring.
Area of Science:
- Neurology
- Oncology
- Radiology
Background:
- Lung cancer patients may develop brain metastases requiring treatment.
- Chemo-radiation therapy is a common treatment for lung cancer.
- Gamma knife radiosurgery is a stereotactic radiation technique used for treating brain tumors.
Observation:
- A 37-year-old man with lung cancer developed a ring-enhanced lesion in the temporal lobe after chemo-radiation therapy.
- The lesion was initially diagnosed as brain metastasis and treated with gamma knife radiosurgery.
- Despite repeated radiosurgery, the lesion showed irregular enhancement and swelling, necessitating emergency surgery.
Findings:
- Histological examination revealed the lesion to be a cavernous malformation, not a tumor recurrence.
- This suggests that gamma knife radiosurgery can induce or exacerbate cavernous malformations.
Implications:
- This case highlights a potential, albeit rare, complication of gamma knife radiosurgery.
- It underscores the importance of considering radiation-induced changes in the differential diagnosis of enhancing brain lesions after radiotherapy.
- Further research may be needed to understand the mechanisms and incidence of radiation-induced cavernous malformations.
