brachytherapy
Pronunciation: BRAK-ee-ther-ah-pee
A form of radiation therapy using radioactive sources placed directly on or within the eye to treat ocular tumors.
Full Definition
Brachytherapy in ocular oncology involves the surgical placement of radioactive plaques or implants directly onto the sclera adjacent to intraocular tumors. This technique delivers high-dose radiation to the tumor while minimizing exposure to surrounding healthy tissues. Commonly used isotopes include iodine-125 and ruthenium-106. The procedure is often preferred for medium-sized choroidal melanomas as it may preserve vision while achieving local tumor control. Treatment duration typically ranges from several days to a week before plaque removal.
Usage
Usage note: Often preceded by 'episcleral' in ocular contexts to specify placement location.
In Context
- "Episcleral brachytherapy with iodine-125 plaques achieved excellent local control." — Radiation oncology treatment summary
- "The brachytherapy procedure required precise plaque positioning using ultrasound guidance." — Surgical technique description