Please select the option that best describes you:
What is your approach for LINAC based radiosurgery when dealing with benign perioptic lesions very close to the optics apparatus?
For LINAC radiosurgery systems, when would you neither offer hypofractionated SRS or SRS for benign perioptic lesions? Is there a distance from the optics cutoff that you have in mind, especially when using at least a 1 mm tumor PTV?
Also, does the patients age factor into your decision making?
Answer from: Radiation Oncologist at Academic Institution
It all starts with the consideration of what I consider an effective dose of SRS or SRT (hypo-fractionated SRS). The minimum effective dose to achieve local control of a metastatic lesion is usually 18 Gy for single fraction, 27 Gy for 3 fractions, and 30 Gy in 5 fractions.I then consider the histol...
Sign in or Register to read more
Answer from: Radiation Oncologist at Academic Institution
Benign perioptic lesions, such as meningiomas or schwannomas, require less radiation than malignant lesions to control, I use the same reasoning as for malignant lesions but since doses used for benign lesions are smaller, it is usually easier to make the OARs metrics (see discussion below).I first ...