Radiofrequency ablation (RFA) is a treatment that is used for some types of cancer. RFA uses heat to destroy cancer cells. It uses a probe called an electrode to apply an electrical current (radiofrequency) to a tumour. The electrical current heats the cancer cells to high temperatures, which destroys (ablates) the cells. The cancer cells die and the area that's been treated gradually shrinks and becomes scar tissue.
RFA doesn't always manage to destroy all the cancer cells. You may need to be treated more than once. RFA can be repeated if the tumour starts to grow again.