The oligometastatic state was first defined in 1995 and refers to a stage of disease where cancer has spread beyond the site of origin, but is not yet widely metastatic. In such a state of limited metastatic disease, it is hypothesized that eradication of all sites of metastatic disease could result in long-term survival, or even cure, in some participants. Ablation of metastatic deposits can be achieved through several techniques, including surgery, radiofrequency ablation (RFA), or through Stereotactic ablative body radiotherapy (SABR), a new radiotherapy technology that delivers very large, hypofractionated doses of radiotherapy to small tumor targets, with high rates of local control.