Related Experiment Videos
Stereotactically guided conformal radiotherapy for meningiomas
H Alheit1, F H Saran, A P Warrington
1Academic Unit of Radiotherapy and Oncology, The Institute of Cancer Research and The Royal Marsden NHS Trust, Sutton, Surrey, UK.
Summary
Stereotactically guided conformal radiotherapy (SCRT) offers a high-precision treatment for meningiomas, reducing normal tissue exposure. Preliminary results show good tolerance and promising survival rates, warranting further study.
Area of Science:
- Neurosurgery
- Radiation Oncology
- Medical Physics
Background:
- Meningiomas are tumors arising from the meninges.
- Conventional radiotherapy (RT) can lead to significant normal tissue toxicity.
- High-precision RT techniques aim to minimize radiation exposure to surrounding healthy tissues.
Purpose of the Study:
- To describe the technique of stereotactically guided conformal radiotherapy (SCRT).
- To report preliminary results of SCRT in patients with inoperable, residual, or recurrent meningiomas.
- To evaluate the feasibility and early outcomes of SCRT for meningioma treatment.
Main Methods:
- 24 patients with skull base or falx/upper skull meningiomas were treated with SCRT.
- Immobilization used a Gill-Thomas-Cosman (GTC) frame and CT localization with a Brown-Roberts-Wells (BRW) fiducial system.
- Treatment involved 50-55 Gy in 30-33 fractions using conformal blocking with MLC or lead alloy blocks.
Main Results:
- SCRT was well tolerated with minimal toxicity.
- Of 15 patients with neurological deficits, 7 improved and 8 remained unchanged at 3 months.
- One-year progression-free and overall survival rates were 100%.
Conclusions:
- SCRT is a feasible, high-precision conformal RT technique for meningiomas.
- Potential advantages in tumor control, survival, and toxicity require further investigation.
- Long-term prospective studies are needed to confirm the benefits of SCRT over conventional RT.