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Post-stereotactic radiosurgery brain metastases: a review
1Department of Neurosurgery, Roswell Park Cancer Institute, Buffalo, NY, USA - Andrew.Fabiano@RoswellPark.org.
Journal of Neurosurgical Sciences
|January 21, 2015
Summary
Stereotactic radiosurgery (SR) for brain metastases can cause radiation necrosis (RN), a condition mimicking tumor recurrence. Differentiating RN from tumor recurrence non-invasively remains challenging, impacting treatment decisions.
Area of Science:
- Neurology
- Oncology
- Radiology
Background:
- Stereotactic radiosurgery (SR) is a primary treatment for brain metastases.
- Radiation necrosis (RN) is a potential complication of SR, presenting with brain necrosis and edema.
- RN symptoms often peak 9-12 months post-SR, complicating diagnosis.
Purpose of the Study:
- To review diagnostic challenges in differentiating post-SR RN from recurrent metastatic brain tumors.
- To discuss various imaging modalities used for evaluating RN.
- To outline treatment strategies for managing SR-induced RN.
Main Methods:
- Review of current literature on radiation necrosis following stereotactic radiosurgery.
- Discussion of advanced imaging techniques including MR imaging, MR spectroscopy, and positron emission tomography.
- Analysis of treatment options for radiation necrosis.
Main Results:
- No definitive non-invasive diagnostic study currently exists to reliably distinguish RN from recurrent metastatic disease.
- Various imaging modalities show promise but require further validation for accurate differentiation.
- A range of treatment options are available, from conservative management to surgical intervention.
Conclusions:
- Accurate differentiation between radiation necrosis and tumor recurrence after SR is clinically significant.
- Advanced imaging techniques play a crucial role in the diagnostic workup.
- Multimodal treatment approaches are necessary for managing radiation necrosis effectively.
