RESUMEN
Systemic treatment and local treatment of metastatic lesion can improve the survival of patients with colorectal cancer liver metastasis (CRLM). Stereotactic body radiotherapy, also known as stereotactic ablative radiotherapy (SABR), is an effective method for local treatment of metastatic lesion and also has a certain impact on systemic immune status. SABR can directly kill tumor cells and change tumor immune microenvironment through influence on tumor cells and non-tumor cells. SABR combined with immunotherapy may increase the incidence rate of abscopal effect outside the irradiated area by affecting different links of immune response. Stereotactic ablative brachytherapy (SABT) is an independent minimally invasive treatment system with the characteristics of short treatment course, high accuracy, and definite therapeutic effect. This article reviews the application of SABR and SABT in CRLM.