# What is Stereotactic radiosurgery (SRS/SBRT)?

Source: https://oncologyistanbul.com/glossary/stereotactic-radiosurgery

> Highly focused, high-dose radiotherapy delivered in one to five sessions instead of the usual 25–30, using systems like CyberKnife or Gamma Knife.

Despite the name, radiosurgery involves no incision — it uses precisely aimed radiation beams (SRS for brain targets, SBRT for body targets) to destroy a small, well-defined tumor while sparing surrounding tissue. It's an option for tumors that are small and in a location that tolerates focused radiation, sometimes instead of open surgery.

## Related
- [CyberKnife](https://oncologyistanbul.com/treatments/cyberknife)
- [Gamma Knife](https://oncologyistanbul.com/treatments/gamma-knife)

## Authoritative references
- [Wikipedia](https://en.wikipedia.org/wiki/Radiosurgery)
- [Wikidata](https://www.wikidata.org/wiki/Q973234)

Full glossary: https://oncologyistanbul.com/glossary