Stereotactic radiosurgery

What it is

Stereotactic radiosurgery delivers a precise, high dose of radiation to a small, well-defined target in one or a few sessions. Despite the name, it is not actual surgery (no incision is made); it uses many finely focused beams converging on the target. It is used for select small or recurrent gliomas.

Understanding Stereotactic radiosurgery

Stereotactic radiosurgery focuses numerous radiation beams from different directions so they converge precisely on a small target, delivering a high dose there while each individual beam path receives little dose — sparing surrounding tissue. This precision suits small, well-defined targets. For gliomas, its role is more limited than for some other conditions, because diffuse gliomas infiltrate widely (a focused high-dose treatment cannot cover the full infiltrative extent). However, it may be used in select situations — such as a small, focal recurrence, or as part of treatment for certain limited tumor regrowth — where a precise boost can help. It is delivered using specialized systems and requires precise targeting and immobilization. Stereotactic radiosurgery is one specialized radiation option considered in specific circumstances, distinct from the broader fields used for diffuse gliomas. Understanding stereotactic radiosurgery in gliomas clarifies a precise, focused radiation approach for select targets.

Why it matters

Understanding stereotactic radiosurgery helps patients and families see a precise, focused radiation option — delivering a high dose to a small target in few sessions — used for select small or recurrent gliomas, distinct from broader radiation fields.