Brachytherapy
Pronunciation: /BRAY-kee-ther-ah-pee/
Radiation therapy technique where radioactive sources are placed directly into or near the tumor tissue.
Full Definition
Brachytherapy involves the direct placement of radioactive sources into or adjacent to brain tumor tissue, allowing delivery of high radiation doses to the tumor while minimizing exposure to surrounding normal brain. This technique is used for recurrent brain tumors, particularly in previously irradiated areas where additional external beam radiation would be harmful. Common approaches include interstitial implantation of radioactive seeds or balloon catheter placement in resection cavities. Treatment planning requires careful dosimetric calculations to optimize tumor coverage while protecting critical structures.
Usage
Usage note: Specify the type of brachytherapy technique used (interstitial, balloon catheter, etc.).
In Context
- "Brachytherapy was considered for the recurrent glioblastoma given prior external beam radiation therapy." — Radiation oncology consultation
- "The patient underwent balloon catheter brachytherapy following gross total resection." — Treatment summary