Episcleral plaque brachytherapy is a type of radiation treatment used to treat ocular tumors, particularly those located in the choroid or retina. This technique involves placing a small, radioactive plaque directly on the surface of the eye, near the tumor. The plaque emits radiation, which targets and destroys the tumor cells while minimizing damage to surrounding tissues.

The procedure is often used for treating uveal melanomas, which are the most common type of eye cancer. It can also be used for other intraocular tumors that are difficult to access surgically. Episcleral plaque brachytherapy allows for targeted, localized treatment with fewer side effects than external beam radiation.

After the plaque is placed, it typically stays in position for several days before being removed. The patient’s vision is monitored throughout the treatment, and the outcome is generally positive for treating small to medium-sized tumors, preserving both eye function and vision.