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Assessing Results
Periodic MRIs are scheduled to detect shrinkage and other changes at the radiation site. The result of the Gamma Knife treatment appears over days, weeks or months after the treatment. Some of the lesions dissolve or sclerose gradually, while others cease to grow.
The Gamma Knife team maintains contact with the referring physician throughout this period of post-operative assessment.
Gamma Knife Results
Gamma Knife radiosurgery destroys the ability of tumor cells to grow. Long-term studies have shown favorable success rates as follows:
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| Acoustic Neuromas |
90-95% tumor control rate |
|
| AVMs |
80-90% obliteration (2 yrs) |
|
| Glioblastoma Multiforme |
25-35% mediian survival rate (2.5 yrs) |
|
| Meningiomas |
95-97% tumor control rate |
|
| Metastases (all types) |
95-98% control rate |
|
| Pituitary Tumors: |
|
|
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Secretory
|
65-85% tumor control rate |
|
|
Non-Secretory
|
90% tumor control rate |
|
| Trigeminal Neuralgia |
80-85% good to excellent relief |
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